52639 + Interview Questions in Secondary School in Chemistry

1.	You discovered a novel bacterium that glyceraldehyde 3-phosphate is phosphorylated and oxidized byATP in the following reaction: ATP + H2O + NAD+ + glyceraldehyde 3-phosphate --> ADP + NADH +H+ + 1,3-bisphosphoglycerate a) How is this different from the reaction that occurs in most species? b)Do you think the AG for this reaction is going to be more negative or less negative than the reactionthat occurs in most species? Why or why not?
Answer» EXPLANATION: By using the numbers 22,9,7,13 you have to use these numbers once and by adding ,subtracting ,multiplying and dividing you have to MAKE the ANSWER as 24.

1.

You discovered a novel bacterium that glyceraldehyde 3-phosphate is phosphorylated and oxidized byATP in the following reaction: ATP + H2O + NAD+ + glyceraldehyde 3-phosphate --> ADP + NADH +H+ + 1,3-bisphosphoglycerate a) How is this different from the reaction that occurs in most species? b)Do you think the AG for this reaction is going to be more negative or less negative than the reactionthat occurs in most species? Why or why not?

Answer»

By using the numbers 22,9,7,13 you have to use these numbers once and by adding ,subtracting ,multiplying and dividing you have to MAKE the ANSWER as 24.

Discussion

2.	Which of the following does not represents bond dissociation energy(1) H2(e) → 2H)(2) Cl2) 2016)(3) H2O → 2Hg) + O2)(4) 0218) ► 20%
Answer» ANSWER: 3 NUMBER is the answer of this QUESTION

2.

Which of the following does not represents bond dissociation energy(1) H2(e) → 2H)(2) Cl2) 2016)(3) H2O → 2Hg) + O2)(4) 0218) ► 20%

Answer»

ANSWER:

3 NUMBER is the answer of this QUESTION

Discussion

3.	For oxidation of iron,4Fe(s) + 302(g) 2Fc,0,(s) entropy change is - 549.4 JK'mol at 298K.A.Hº for this reaction is - 1648 10' JmolAbove reaction is :-(1) Spontancous(2) Non-spontaneous(3) At equilibrium(4) Can't predict
Answer» OPTION 1 SPONTANEOUS REACTION

3.

For oxidation of iron,4Fe(s) + 302(g) 2Fc,0,(s) entropy change is - 549.4 JK'mol at 298K.A.Hº for this reaction is - 1648 10' JmolAbove reaction is :-(1) Spontancous(2) Non-spontaneous(3) At equilibrium(4) Can't predict

Answer»

OPTION 1 SPONTANEOUS REACTION

Discussion

4.	PH of saturated solution of a metal hydroxide M(OH), is 10. The solubilityproduct (Ksp) of M(OH), will be :(1) 2 x 10-20(2) 4 x 10-30(3) 1 x 10-10(4) 5 * 10-1
Answer» ANSWER: The SOLUBILITY product of a sparingly soluble metal hydroxide M(OH)2 at 298 K is 5 × 10^-16 mol^3 dm^-9 . The pH value of its aqueous and saturated ... Top answer · 2 votes M(OH)2 M^2 + + 2OH^- Ksp = (s)(2s)^2 = 4s^3 = 5 × 10^-16 s = √( 5 × 10^-164) = √( 500 × 10^-184) = 5 × 10^-6 Conc. of OH^- = 2s = 2 × 5 × ...

4.

PH of saturated solution of a metal hydroxide M(OH), is 10. The solubilityproduct (Ksp) of M(OH), will be :(1) 2 x 10-20(2) 4 x 10-30(3) 1 x 10-10(4) 5 * 10-1

Answer»

ANSWER:

The SOLUBILITY product of a sparingly soluble metal hydroxide M(OH)2 at 298 K is 5 × 10^-16 mol^3 dm^-9 . The pH value of its aqueous and saturated ...

5.	PH of saturated solution of a metal hydroxide M(OH)2 is 10. The solubilityproduct (K52) of M(OH), will be:(1) 2 x 10-20(2) 4 x 10-30(3) 1* 10-10(4) 5 x 10-13
Answer» ANSWER: it's 2 answer OK under STAND

PH of saturated solution of a metal hydroxide M(OH)2 is 10. The solubilityproduct (K52) of M(OH), will be:(1) 2 x 10-20(2) 4 x 10-30(3) 1* 10-10(4) 5 x 10-13

Answer»

ANSWER:

it's 2 answer OK under STAND

Discussion

6.	A solution has pH
Answer» ANSWER: Answer ( a) is correct only BASIC

6.

A solution has pH

Answer»

ANSWER:

Answer ( a) is correct

only BASIC

Discussion

7.	SREE VIVEKANANDA MATRIC HIGHER SECONDARY SCHOOL KOOTTUMANGALAM, MONDAIKADU(P.O) MODEL EXAMINATION 2021 MATHEMATICSTIME: 1.30hrsMARKS: 505x1=5(4) 12STD:XI. Choose the correct answer1. If (5,7(3,P) and (6,6) are collinear then the value of P is(1)3(2) 6(3) 92. The equation of a line passing through the origin and perpendicular to the line 7x-3y+4-0 is(1) 7x-3y+4-0(2)3x-7y+4=0(3) 3x+7y=03. The area of triangle formed by pts (-5,00,-5) and (5,0) is(1) 0 sq.units (2) 25 sq.units (3) 5 sq.units4. The scope of the line joining (12,3) (4,a) is 1/8. The value of a is(1) 1(2) 4(3) (-5)(4) 7x-3y=0(4) None of these5. (2,1) is the pt of intersection of two lines (1) x-y-3-0,3x-y-7-0 (2) xty 3, 3x+y=7 (3) 3x+y=3, x+y=7 (4)x+3y-3-0. x-y-7-0(4) 2II. Answer the following questions (Any Six) Question No:13 is compulsory 6 x 2= 12 6. Solve 2m +19m+30-0 by factorization method.7. Solve 2x-5x+2-0 by formula method. 8. If the difference between a number and its reciprocal is Find the number9. Determine x-x-1=0 is the nature of roots of quadratic equation 10. If the pts P(-1.5,3) Q(6.-2) R(-3,4) are collinear or not?11. The line r pusses through the pis (-2,2) and (5,8) and the line S passes through the pts (-8,7) and (-2,0). Is the line are perpendicular to S?12. Find the equation of a straight line passing through (5,-3) and (7,-4).13 13. If a, B are the roots of 7x+ax+2=0 and if B-a = Find value of 'a"III. Answer the following questions (Any Five) Question No.20 is compulsory 14. Solve 9x-12x+4 0 by completing the square method.5x5 2515. A passenger train takes 1hr more than an express train to travel a distance of 240km fromChennai to Virudhachalam. The speed of passenger train is less than that of an express train by20km per hour. Find the average speed of both the trains?16. If the roots of equation (c-ab)x-2(a-bc)x+b-ac=0 are real and equal. Prove that either a-0 (or) a'+b+c=3abe.17. If a, B are the roots of equation 2x-x-1=0 then form a equation whose roots are18. Find the value of k if area of a quadrilateral is 28 sq.units, whose vertices are (-4,-2) (-3,k) (3,-2) and (2,3)19. Using the concept of slope, show that the pts (-2,5) (6,-1) and (2,2) are collinear. 20. A line makes positive intercepts on co-ordinate axes whose sum is 7 and its passes through(-3,8). Find its equation.IV. Answer the following questions1x8-821. Construct a APQR which PQ=&em. R = 60° and the median RG from R to PQ is 5.8cm.
Answer» Explanation: 5.8 CM. I HOPE it HELPS you

7.

SREE VIVEKANANDA MATRIC HIGHER SECONDARY SCHOOL KOOTTUMANGALAM, MONDAIKADU(P.O) MODEL EXAMINATION 2021 MATHEMATICSTIME: 1.30hrsMARKS: 505x1=5(4) 12STD:XI. Choose the correct answer1. If (5,7(3,P) and (6,6) are collinear then the value of P is(1)3(2) 6(3) 92. The equation of a line passing through the origin and perpendicular to the line 7x-3y+4-0 is(1) 7x-3y+4-0(2)3x-7y+4=0(3) 3x+7y=03. The area of triangle formed by pts (-5,00,-5) and (5,0) is(1) 0 sq.units (2) 25 sq.units (3) 5 sq.units4. The scope of the line joining (12,3) (4,a) is 1/8. The value of a is(1) 1(2) 4(3) (-5)(4) 7x-3y=0(4) None of these5. (2,1) is the pt of intersection of two lines (1) x-y-3-0,3x-y-7-0 (2) xty 3, 3x+y=7 (3) 3x+y=3, x+y=7 (4)x+3y-3-0. x-y-7-0(4) 2II. Answer the following questions (Any Six) Question No:13 is compulsory 6 x 2= 12 6. Solve 2m +19m+30-0 by factorization method.7. Solve 2x-5x+2-0 by formula method. 8. If the difference between a number and its reciprocal is Find the number9. Determine x-x-1=0 is the nature of roots of quadratic equation 10. If the pts P(-1.5,3) Q(6.-2) R(-3,4) are collinear or not?11. The line r pusses through the pis (-2,2) and (5,8) and the line S passes through the pts (-8,7) and (-2,0). Is the line are perpendicular to S?12. Find the equation of a straight line passing through (5,-3) and (7,-4).13 13. If a, B are the roots of 7x+ax+2=0 and if B-a = Find value of 'a"III. Answer the following questions (Any Five) Question No.20 is compulsory 14. Solve 9x-12x+4 0 by completing the square method.5x5 2515. A passenger train takes 1hr more than an express train to travel a distance of 240km fromChennai to Virudhachalam. The speed of passenger train is less than that of an express train by20km per hour. Find the average speed of both the trains?16. If the roots of equation (c-ab)x-2(a-bc)x+b-ac=0 are real and equal. Prove that either a-0 (or) a'+b+c=3abe.17. If a, B are the roots of equation 2x-x-1=0 then form a equation whose roots are18. Find the value of k if area of a quadrilateral is 28 sq.units, whose vertices are (-4,-2) (-3,k) (3,-2) and (2,3)19. Using the concept of slope, show that the pts (-2,5) (6,-1) and (2,2) are collinear. 20. A line makes positive intercepts on co-ordinate axes whose sum is 7 and its passes through(-3,8). Find its equation.IV. Answer the following questions1x8-821. Construct a APQR which PQ=&em. R = 60° and the median RG from R to PQ is 5.8cm.

Answer»

Explanation:

5.8 CM.

I HOPE it HELPS you

Discussion

8.	Law of gravitation explains the gravitational force between____1️⃣ the earth and a point mass only2️⃣ the earth and sun only3️⃣ any two bodies having some mass4️⃣ two charged bodies onlyanswer me
Answer» Answer: OPTION 3 Explanation: Any two BODIES having some mass Mark BRAINLIEST please:)

8.

Law of gravitation explains the gravitational force between____1️⃣ the earth and a point mass only2️⃣ the earth and sun only3️⃣ any two bodies having some mass4️⃣ two charged bodies onlyanswer me

Answer»

Answer:

OPTION 3

Explanation:

Any two BODIES having some mass

Mark BRAINLIEST please:)

Discussion

9.	Assertion: The chemical properties of an isotope are similarReason Each isotope of an element is a pure substance
Answer» ANSWER: yes Explanation: ISOTOPE of some element can be separated by CHEMICAL method such as electrolysis. each isotope of element is a PURE SUBSTANCE

9.

Assertion: The chemical properties of an isotope are similarReason Each isotope of an element is a pure substance

Answer»

ANSWER:

yes

Explanation:

ISOTOPE of some element can be separated by CHEMICAL method such as electrolysis. each isotope of element is a PURE SUBSTANCE

Discussion

10.	Define democracy ?bye EVERYONE meet u on Monday..Hapiee holi..Take care..byeee
Answer» ANSWER: DEMOCRACY is of the PEOPLE, for the people, and by the people..

10.

Define democracy ?bye EVERYONE meet u on Monday..Hapiee holi..Take care..byeee

Answer»

ANSWER:

DEMOCRACY is of the PEOPLE, for the people, and by the people..

Discussion

11.	SHORTWhat do you observe when you are visiting a nearbyList the steps involved in the preparation of fabric.
Answer» EXPLANATION: smsmsk to be ADDED to your own SCRIPT and it and

11.

SHORTWhat do you observe when you are visiting a nearbyList the steps involved in the preparation of fabric.

Answer»

EXPLANATION:

smsmsk to be ADDED to your own SCRIPT and it and

Discussion

12.	♡Tera Saath hai Toh kya kami hai ♡♡Teri har muskan se mili mujhe khushi♡♡Muskuraate Rehna isi tarah humesha♡♡Kyuki teri iss muskan mein meri jaan basi hai..♡#for u my lil..siso#Dhoklu..#love u bhena..❣
Answer» Answer: hayeee so sweet THANKS ÇØÇKRØÀÇH XD!! I thought AP bhul GAYE but .. you are the best brother ✌️

12.

♡Tera Saath hai Toh kya kami hai ♡♡Teri har muskan se mili mujhe khushi♡♡Muskuraate Rehna isi tarah humesha♡♡Kyuki teri iss muskan mein meri jaan basi hai..♡#for u my lil..siso#Dhoklu..#love u bhena..❣

Answer»

Answer:

hayeee so sweet THANKS ÇØÇKRØÀÇH XD!!

I thought AP bhul GAYE but ..

you are the best brother ✌️

Discussion

13.	0-27). (a) Arrange the following species in increasing order of their ionic sizesN-NaF 0²-(b) How does atomic radius vary in a period and in a group? How do you explainvariation?
Answer» Answer: Explanation: B ) In a period, from left to right, with INCREASE in the ATOMIC number, the atomic radius DECREASES due to increase in the nuclear charge which increases the attraction of the NUCLEUS for the valence electrons. In a group, on moving from TOP to bottom, the ionic

13.

0-27). (a) Arrange the following species in increasing order of their ionic sizesN-NaF 0²-(b) How does atomic radius vary in a period and in a group? How do you explainvariation?

Answer»

Answer:

Explanation:

B ) In a period, from left to right, with INCREASE in the ATOMIC number, the atomic radius DECREASES due to increase in the nuclear charge which increases the attraction of the NUCLEUS for the valence electrons. In a group, on moving from TOP to bottom, the ionic

Discussion

14.	Define democracy?'♡Aankho Me Rahen Walo Ko Yaad Nahi Karte,♡♡Dil Me Rehne Walo Ki Baat Nahi Karte:♡♡Humari To Rooh Me Bus Gaye Hai Woh,♡♡Tabhi To Hum Milne Ki Fariyad Nahi Karte.♡
Answer» DEMOCRACY is a form of CONSTITUTION where people can ELECT or what their own representatives. #always KEEP smiling^_^

14.

Define democracy?'♡Aankho Me Rahen Walo Ko Yaad Nahi Karte,♡♡Dil Me Rehne Walo Ki Baat Nahi Karte:♡♡Humari To Rooh Me Bus Gaye Hai Woh,♡♡Tabhi To Hum Milne Ki Fariyad Nahi Karte.♡

Answer»

DEMOCRACY is a form of CONSTITUTION where people can ELECT or what their own representatives.

#always KEEP smiling^_^

Discussion

15.	A compound contains 4.07% hydrogen, 24.27% carbon and 71.65 % chlorine by mass. Its molar mass is 98.96 g. What is its empirical formula ? Atomic masses of hydrogen, carbon and chlorine are 1.008, 12.000 and 35.453 u, respectively
Answer» Explanation: Divide the given percentages of atoms with their molecular masses H---4.07/1 =4.07 C---24.27/12 =2.02 Cl--71.65/35.5=2.01 step 2 divide all values with the LOWEST VALUE obtained. H---4.07/2.01=2 C---2.02/2.01=1 Cl---2.01/2.01=1 therefore the empirical FORMULA is CH 2 Cl WEIGHT OF EMPIRICAL FORMULA=12+2+35.5=49.5 Given molecular weight =98.96 which is double of empirical weight .therefore molecular formula is C 2 H 4 Cl 2 . BY TEJAS KULKARNI PLEASE FOLLOW AND MARK AS BRAINLIST AND FOLLOW FOR MORE ANSWERS!!

15.

A compound contains 4.07% hydrogen, 24.27% carbon and 71.65 % chlorine by mass. Its molar mass is 98.96 g. What is its empirical formula ? Atomic masses of hydrogen, carbon and chlorine are 1.008, 12.000 and 35.453 u, respectively

Answer»

Explanation:

Divide the given percentages of atoms with their molecular masses

H---4.07/1 =4.07

C---24.27/12 =2.02

Cl--71.65/35.5=2.01

step 2

divide all values with the LOWEST VALUE obtained.

H---4.07/2.01=2

C---2.02/2.01=1

Cl---2.01/2.01=1

therefore the empirical FORMULA is

CH

2

Cl

WEIGHT OF EMPIRICAL FORMULA=12+2+35.5=49.5

Given molecular weight =98.96 which is double of empirical weight .therefore molecular formula is C

2

H

4

Cl

2

.

BY TEJAS KULKARNI PLEASE FOLLOW AND MARK AS BRAINLIST AND FOLLOW FOR MORE ANSWERS!!

Discussion

16.	2. Which of the following changes is not correctly matched?a. Formation of cloudDesirable change b. Growth of a plant - Slow changeC. Swinging of a pendulum – Periodic change d. Burning of wood - Physical change
Answer» ANSWER: OPTION (c) BCOZ it has periodic change it

16.

2. Which of the following changes is not correctly matched?a. Formation of cloudDesirable change b. Growth of a plant - Slow changeC. Swinging of a pendulum – Periodic change d. Burning of wood - Physical change

Answer»

ANSWER:

OPTION (c)

BCOZ it has periodic change it

Discussion

17.	24. Which statement does not describe a property of a weak acid in solution?a it forms a salt with sodium hydroxide
Answer» Answer: *sorry* I am trying to GET the answer to your site and I will GIVE you the answer to your site and I will give you the answer *you* *are* *not* *you* I would LIKE to DAY

17.

24. Which statement does not describe a property of a weak acid in solution?a it forms a salt with sodium hydroxide

Answer»

Answer:

sorry I am trying to GET the answer to your site and I will GIVE you the answer to your site and I will give you the answer you are not you I would LIKE to DAY

Discussion

18.	3. Which of the following changes is a fast change?Formation of day and nightc. Burning of paperb. Changes in sedd. Weathering ofed
Answer» ANSWER: BURNING of paper Explanation: here is the RIGHT answer

18.

3. Which of the following changes is a fast change?Formation of day and nightc. Burning of paperb. Changes in sedd. Weathering ofed

Answer»

ANSWER:

BURNING of paper

Explanation:

here is the RIGHT answer

Discussion

19.	Give the name of the substances produced from the hydrolysis of thetriacyl glyceride given below .O//CH2OC(CH2)16CH3O//CHOC(CH2)7CH=CH(CH2)7CH3O//CH2OC(CH2)14CH3
Answer» EXPLANATION: OPTION 3 is CORRECT ANSWER

19.

Give the name of the substances produced from the hydrolysis of thetriacyl glyceride given below .O//CH2OC(CH2)16CH3O//CHOC(CH2)7CH=CH(CH2)7CH3O//CH2OC(CH2)14CH3

Answer»

EXPLANATION:

OPTION 3 is CORRECT ANSWER

Discussion

20.	An organic compound 'A' on oxidation with PCC to give an aldehyde having molecular formula C2H4O. What is the IUPAC name of 'A' compound?
Answer» PCC is a mild reducing AGENT, and it converts primary alcohols to aldehydes and secondary alcohols into ketones The formula of the given oxidised aldehyde is: C₂H₄O So, the REDUCED structure of the product is: C₂H₆O So, the organic COMPOUND is ethanol C₂H₅OH please mark me brainliest

20.

An organic compound 'A' on oxidation with PCC to give an aldehyde having molecular formula C2H4O. What is the IUPAC name of 'A' compound?

Answer»

PCC is a mild reducing AGENT, and it converts primary alcohols to aldehydes and secondary alcohols into ketones

The formula of the given oxidised aldehyde is: C₂H₄O

So, the REDUCED structure of the product is: C₂H₆O

So, the organic COMPOUND is ethanol

C₂H₅OH

please mark me brainliest

Discussion

21.	Explain the term chemical formula
Answer» Answer: hey MATE here is your answer A chemical formula tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the ELEMENTS present in the compound as WELL as how many there are for each element in the form of SUBSCRIPTS.... HOPE it will help you.....

21.

Explain the term chemical formula

Answer»

Answer:

hey MATE here is your answer

A chemical formula tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the ELEMENTS present in the compound as WELL as how many there are for each element in the form of SUBSCRIPTS....

HOPE it will help you.....

Discussion

22.	Which metals do not react with acids
Answer» ANSWER: PLATINUM , COPPER and Mercury. Explanation: REMARK me on BRAINLIEST

22.

Which metals do not react with acids

Answer»

ANSWER:

PLATINUM , COPPER and Mercury.

Explanation:

REMARK me on BRAINLIEST

Discussion

23.	Which of the following does not contain water of crystallization.....A. Copper SulphateB. Baking sodaC. Washing sodaD. Gypsum
Answer» Answer: d gypsum Explanation: GIVE me LIKE MARK me branliest and FOLLOW me and vote me

23.

Which of the following does not contain water of crystallization.....A. Copper SulphateB. Baking sodaC. Washing sodaD. Gypsum

Answer»

Answer:

d gypsum

Explanation:

GIVE me LIKE MARK me branliest and FOLLOW me and vote me

Discussion

24.	What is tearm hallucination means
Answer» Answer: an EXPERIENCE involving the APPARENT PERCEPTION of something not present.

24.

What is tearm hallucination means

Answer»

Answer:

an EXPERIENCE involving the APPARENT PERCEPTION of something not present.

Discussion

25.	Ethyl chloride is treated with aqueous koh
Answer» Answer: ETHYL chloride can undergo both nucleophilic substitution as well as elimination reactions with strong alkali like KOH. When it UNDERGOES nucleophilic substitution, ethyl alcohol is formed as major product. Explanation: hope it helps you plzz mark me as UR BRAINLIAST ❤️❤️❤️❤️

25.

Ethyl chloride is treated with aqueous koh

Answer»

Answer:

ETHYL chloride can undergo both nucleophilic substitution as well as elimination reactions with strong alkali like KOH. When it UNDERGOES nucleophilic substitution, ethyl alcohol is formed as major product.

Explanation:

hope it helps you

plzz mark me as UR BRAINLIAST ❤️❤️❤️❤️

Discussion

26.	Formula for sodium hydroxide
Answer» Answer: HAI mate here is UR answer ❤️❤️ ❣️❣️Sodium hydroxide = NaOH❣️❣️ Hope U understand ❤️ Tag me as brainliest ❤️❤️ Thank me ❤️❤️❤️

26.

Formula for sodium hydroxide

Answer»

Answer:

HAI mate here is UR answer ❤️❤️

❣️❣️Sodium hydroxide = NaOH❣️❣️

Hope U understand ❤️

Tag me as brainliest ❤️❤️

Thank me ❤️❤️❤️

Discussion

27.	What is lawof conservation of mass
Answer» Explanation: The law of conservation of mass or principle of mass conservation STATES that for any system CLOSED to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be ADDED nor be REMOVED.

27.

What is lawof conservation of mass

Answer»

Explanation:

The law of conservation of mass or principle of mass conservation STATES that for any system CLOSED to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be ADDED nor be REMOVED.

Discussion

28.	Calculate charge and mas of lithium nucleus
Answer» Answer: A nucleus consists of Z protons and N neutrons. Let the MASS of the nucleus be M (Z, N ). If a nucleus is assumed to be a SIMPLE collection of Z protons and N neutrons, the mass of the nucleus WOULD be just the sum of the masses of these constituent NUCLEONS, i.e. , where is the mass of proton and is that of NEUTRON.. Explanation: please mark me as a BRAINLIEST..

28.

Calculate charge and mas of lithium nucleus

Answer»

Answer:

A nucleus consists of Z protons and N neutrons. Let the MASS of the nucleus be M (Z, N ). If a nucleus is assumed to be a SIMPLE collection of Z protons and N neutrons, the mass of the nucleus WOULD be just the sum of the masses of these constituent NUCLEONS, i.e. , where is the mass of proton and is that of NEUTRON..

Explanation:

please mark me as a BRAINLIEST..

Discussion

29.	What is the drugs abuse?
Answer» PLS MARKS me as BRANLIEST

Discussion

30.	What is formula for rust
Answer» ANSWER: the above MENTIONED answer MAY HELP you

30.

What is formula for rust

Answer»

ANSWER:

the above MENTIONED answer MAY HELP you

Discussion

31.	write a balanced net ionic equation for the neutralisation of equal molar amount of nitric acid and methylamine (CH3NH2).indicate whether pH after neutralisation is greater than,equal to,or less than 7
Answer» Answer: I am so SORRY but I did not get your QUESTION... Please FOLLOW me......

31.

write a balanced net ionic equation for the neutralisation of equal molar amount of nitric acid and methylamine (CH3NH2).indicate whether pH after neutralisation is greater than,equal to,or less than 7

Answer»

Answer:

I am so SORRY but I did not get your QUESTION...

Please FOLLOW me......

Discussion

32.	Plz answer correctly
Answer» ANSWER: i THINK it the number a that should be the answer ok hope its hlep full Explanation:

32.

Plz answer correctly

Answer»

ANSWER:

i THINK it the number a that should be the answer ok hope its hlep full

Explanation:

Discussion

33.	Highest rank of hierarchy level is family
Answer» GOOD morning mate here is your answer if you like then MARK me BRAINLIST.. Explanation: A hierarchy (from the Greek ἱεραρχία hierarkhia, "rule of a high priest", from hierarkhes, "president of sacred rites") is an arrangement of items (objects, names, values, categories, etc.) in which the items are represented as being "above", "below", or "at the same level as" one another. Hierarchy is an important concept in a wide variety of fields, such as philosophy, mathematics, computer science, organizational theory, systems theory, and the social sciences (especially POLITICAL philosophy).

33.

Highest rank of hierarchy level is family

Answer»

GOOD morning mate here is your answer if you like then MARK me BRAINLIST..

Explanation:

A hierarchy (from the Greek ἱεραρχία hierarkhia, "rule of a high priest", from hierarkhes, "president of sacred rites") is an arrangement of items (objects, names, values, categories, etc.) in which the items are represented as being "above", "below", or "at the same level as" one another. Hierarchy is an important concept in a wide variety of fields, such as philosophy, mathematics, computer science, organizational theory, systems theory, and the social sciences (especially POLITICAL philosophy).

Discussion

34.	Write conversion of 1,4-dichlorobutane to hexan-1,6-diamine
Answer» ANSWER: Hello mate here is your answer ⬇️✍️ *1,4 dichlorobutane is treated with ethanolic SODIUM cyanide to GET didinitrile which is REDUCED to get Hexan-1,6-diamine.* Hope it helps......✌️❤️

34.

Write conversion of 1,4-dichlorobutane to hexan-1,6-diamine

Answer»

ANSWER:

Hello mate here is your answer ⬇️✍️

1,4 dichlorobutane is treated with ethanolic SODIUM cyanide to GET didinitrile which is REDUCED to get Hexan-1,6-diamine.

Hope it helps......✌️❤️

Discussion

35.	Balanced ionicequationHNO₃ +CH3 NH2
Answer» this is not at all an EQUATION .it only has REACTANTS no PRODUCT.

Discussion

36.	Write conversion of methyl chloride to ethyl amine
Answer» Mthylamine is first converted into Methanol. This is than treated with IODINE to get mthyl iodide Than by USING KON , we get METHYL CYANIDE. It is than treated with alcohol to get ethyl amine

36.

Write conversion of methyl chloride to ethyl amine

Answer»

Mthylamine is first converted into Methanol. This is than treated with IODINE to get mthyl iodide

Than by USING KON , we get METHYL CYANIDE. It is than treated with alcohol to get ethyl amine

Discussion

37.	Which metal is more reactive : iron or zinc
Answer» Answer: So ZINC is more reactive than IRON and copper. In a displacement reaction ( a more reactive metal DISPLACES a less reactive metal from its compound SOLUTION) zinc displaces iron from ironsulphate solution and becomes zinc sulphate.so zinc is more reactive than iron

37.

Which metal is more reactive : iron or zinc

Answer»

Answer:

So ZINC is more reactive than IRON and copper. In a displacement reaction ( a more reactive metal DISPLACES a less reactive metal from its compound SOLUTION) zinc displaces iron from ironsulphate solution and becomes zinc sulphate.so zinc is more reactive than iron

Discussion

38.	Q1 :-What is fossil? Q2 :-Which petroleum product is used as fuel in airplane? Give two other uses of product. Q3:-Which product was used earlier for Metalling road?
Answer»

Discussion

39.	Name the crystal showing both schottky and frenkel defect
Answer» Answer: silver HALDIES Video Explanation. AGBR has both schottky and frenkel DEFECTS. In general, silver haldies show both schottky and frenkel defects. In schottky DEFECT, EQUAL number of cations and anions are missing from crystal lattice.Oc

39.

Name the crystal showing both schottky and frenkel defect

Answer»

Answer:

silver HALDIES

Video Explanation. AGBR has both schottky and frenkel DEFECTS. In general, silver haldies show both schottky and frenkel defects. In schottky DEFECT, EQUAL number of cations and anions are missing from crystal lattice.Oc

Discussion

40.	Sample A (blue) + heat → Residue B (black) +Gas C(acidic) + Gas D [2] (reddish brown) ( neutral) Identify A, B, C and D
Answer» EXPLANATION: Cu 2+ ion on strongly heating leaves a black residue. Copper SULFATE is normally found in the form of blue crystals, copper (II) sulfate pentahydrate. When you heat copper sulfate pentahydrate it turns white as the water which is driven off by the heat. The white solid remaining is anhydrous copper sulfate. On further heating, it changes to black color. If you ADD water to the anhydrous copper sulfate an exothermic reaction occurs, you can FEEL the test-tube getting hot, as the blue copper sulfate pentahydrate is re-formed.

40.

Sample A (blue) + heat → Residue B (black) +Gas C(acidic) + Gas D [2] (reddish brown) ( neutral) Identify A, B, C and D

Answer»

EXPLANATION:

Cu

2+

ion on strongly heating leaves a black residue.

Copper SULFATE is normally found in the form of blue crystals, copper (II) sulfate pentahydrate. When you heat copper sulfate pentahydrate it turns white as the water which is driven off by the heat. The white solid remaining is anhydrous copper sulfate. On further heating, it changes to black color. If you ADD water to the anhydrous copper sulfate an exothermic reaction occurs, you can FEEL the test-tube getting hot, as the blue copper sulfate pentahydrate is re-formed.

Discussion

41.	Vii.A compound forms hcp structure.Number of octahedral and tetrhedralvoids in 0.5 mole 6f substance isrespectivelya. 3.0111023, 6.022x1023b. 6.022x1023, 3.0111023c. 4.011x1023, 2.011x1023d. 6.011x1023, 12.022x1023
Answer» ANSWER:This may HELP you Explanation: Number of close-packed PARTICLES = 0.5×6.022×1023= 3.011×1023 Therefore, number of OCTAHEDRAL voids = 3.011×1023 And, number of tetrahedral voids = 2×3.011×1023= 6.022×1023 Therefore, total number of voids = 3.011×1023+ 6.022×1023= 9.033×1023

41.

Vii.A compound forms hcp structure.Number of octahedral and tetrhedralvoids in 0.5 mole 6f substance isrespectivelya. 3.0111023, 6.022x1023b. 6.022x1023, 3.0111023c. 4.011x1023, 2.011x1023d. 6.011x1023, 12.022x1023

Answer»

ANSWER:This may HELP you

Explanation:

Number of close-packed PARTICLES

= 0.5×6.022×1023= 3.011×1023

Therefore, number of OCTAHEDRAL voids = 3.011×1023

And, number of tetrahedral voids

= 2×3.011×1023= 6.022×1023

Therefore, total number of voids

= 3.011×1023+ 6.022×1023= 9.033×1023

Discussion

42.	Write the name of any five metals which are used in counstruction buildings
Answer» ANSWER: iron steel .., EXPLANATION: *PLEASE* *FOLLOW* me *and*❤

42.

Write the name of any five metals which are used in counstruction buildings

Answer»

ANSWER:

iron
steel
..,

EXPLANATION:

PLEASE FOLLOW me and❤

Discussion

43.	4.What are the important steps in the preparation of soil?
Answer» answer.. In agriculture, ploughing, leveling, and MANURING are the three steps of soil preparation. Ploughing INCLUDES loosening and digging of soil. During ploughing, the soil BECOMES LOOSE and the NUTRIENTS in deep soil come to the top. Mark me as brainliest and follow me (◔‿◔)

43.

4.What are the important steps in the preparation of soil?

Answer»

answer..

In agriculture, ploughing, leveling, and MANURING are the three steps of soil preparation. Ploughing INCLUDES loosening and digging of soil. During ploughing, the soil BECOMES LOOSE and the NUTRIENTS in deep soil come to the top.

Mark me as brainliest and follow me

(◔‿◔)

Discussion

44.	Q1 - Which fuel is used to run heavy motor vehicles , electric generator? Q2- What is diesel? How is it useful? Plz Answer fast and short answer too
Answer» Answer: 1 DIESEL,diesel is a PRODUCT of petroleum.it is USEFUL for RUNNING vehciles and and other MACHINES

44.

Q1 - Which fuel is used to run heavy motor vehicles , electric generator? Q2- What is diesel? How is it useful? Plz Answer fast and short answer too

Answer»

Answer:

1 DIESEL,diesel is a PRODUCT of petroleum.it is USEFUL for RUNNING vehciles and and other MACHINES

Discussion

45.	Which metal appears dull
Answer» ANSWER: Metals GENERALLY appear to be dull because of the reaction of them with moisture of AIR. Their brightness can be restored by rubbing with shining PAPER.

45.

Which metal appears dull

Answer»

ANSWER:

Metals GENERALLY appear to be dull because of the reaction of them with moisture of AIR. Their brightness can be restored by rubbing with shining PAPER.

Discussion

46.	Find the number of oxygen atoms in 18g of CO
Answer» ANSWER: Explanation: The number of OXYGEN ATOMS is 6.022 x 10^23 Pls mark as BRAINLIEST

46.

Find the number of oxygen atoms in 18g of CO

Answer»

ANSWER:

Explanation:

The number of OXYGEN ATOMS is 6.022 x 10^23

Pls mark as BRAINLIEST

Discussion

47.	What do you understand by the term ductile
Answer» Answer: Hola Explanation: Ductile is a PROPERTY of METALS. which MEANS that the metals can be drown into thin WIRES ..... ♥♥✌♥♥

47.

What do you understand by the term ductile

Answer»

Answer:

Hola

Explanation:

Ductile is a PROPERTY of METALS.

which MEANS that the metals can be drown into thin WIRES .....

♥♥✌♥♥

Discussion

48.	Calculae no. Of SO4 ions in 1.96 g of Cr2(SO4) 3
Answer» EXPLANATION: SINCE Cr2(SO4)3 is a MOLECULE, it's oxidation number is 0. And the oxidation number of (SO4) is ALWAYS -2. Therefore, the oxidation number of Cr in Cr2(SO4)3 is +3.

48.

Calculae no. Of SO4 ions in 1.96 g of Cr2(SO4) 3

Answer»

EXPLANATION:

SINCE Cr2(SO4)3 is a MOLECULE, it's oxidation number is 0. And the oxidation number of (SO4) is ALWAYS -2. Therefore, the oxidation number of Cr in Cr2(SO4)3 is +3.

Discussion

49.	Stepwise formula of pottasium nitrate
Answer» ANSWER:The chemical or molecular formula of POTASSIUM Nitrate is KNO3. It is a crystalline solid WHITE to DIRTY grey in colour, which is ODOURLESS and has a cooling, saline pungent taste. hope this helps you mate plz mark me as the brainliest

49.

Stepwise formula of pottasium nitrate

Answer»

ANSWER:The chemical or molecular formula of POTASSIUM Nitrate is KNO3. It is a crystalline solid WHITE to DIRTY grey in colour, which is ODOURLESS and has a cooling, saline pungent taste.

hope this helps you mate

plz mark me as the brainliest

Discussion

50.	at constant pressure, the volume of a gas is 500l at 300k. what is the volume of the gas if temperature is increased to 600k?
Answer» Given: Pressure is constant. Initial VOLUME (v1) = 500 L Initial temperature(T1) = 300 K. FINAL temperature (T2) = 600 K. To find: The final volume of the gas(v2) Solution: Pressure is constant through out the process. Initial volume(v1) = 500 L. Initial temperature(T1) = 300 K. Final temperature(T2) = 600 K. From the Charle's law equation we get that, $\dfrac{v1}{T1} = \dfrac{v2}{T2}$ [ At constant pressure.] $or, \dfrac{500}{300} = \dfrac{v2}{600}$ $or, \dfrac{v2}{600} = \dfrac{500}{300}$ or, v2 = (500×600)/300 or, v2 = (500×2) or, v2 = 1000 L. ∴ The volume of the gas will be 1000 L. Answer: The volume of the gas will be 1000 L.

50.

at constant pressure, the volume of a gas is 500l at 300k. what is the volume of the gas if temperature is increased to 600k?

Answer»

Given:

Pressure is constant.
Initial VOLUME (v1) = 500 L
Initial temperature(T1) = 300 K.
FINAL temperature (T2) = 600 K.

To find:

The final volume of the gas(v2)

Solution:

Pressure is constant through out the process.

Initial volume(v1) = 500 L.

Initial temperature(T1) = 300 K.

Final temperature(T2) = 600 K.

From the Charle's law equation we get that,

$\dfrac{v1}{T1} = \dfrac{v2}{T2}$ [ At constant pressure.]

$or, \dfrac{500}{300} = \dfrac{v2}{600}$

$or, \dfrac{v2}{600} = \dfrac{500}{300}$

or, v2 = (500×600)/300

or, v2 = (500×2)

or, v2 = 1000 L.

∴ The volume of the gas will be 1000 L.

Answer:

The volume of the gas will be 1000 L.

Discussion

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❣️❣️Sodium hydroxide = NaOH❣️❣️

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To find:

Solution:

Answer:

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