52639 + Interview Questions in Secondary School in Chemistry

1.	The most prominent gases in the atmosphere in terms of volume are
Answer» H҈ e҈ y҈ f҈ r҈ i҈ e҈ n҈ d҈ ⊙ NITROGEN $hope \: it \: helps$

Discussion

2.	How to prepare chemistry for exam.. Of class 11...
Answer» By STUDYING and what ? do HARDWORK you GET SUCCESS.

Discussion

3.	Why do helium change our voice?
Answer» Your QUESTION is CORRECT CHECK ONES

Discussion

4.	Give one example of artificial sweeteners
Answer» EXAMPLES are SACCHRIN and sucralose mark as BRAINLIEST

Discussion

5.	If the radius of hydrogen atom is 53 pm, the radius of he+ ion is close to
Answer» $\huge\red{As-Salamu-Alykum}$ _______________ $\huge\green{Answer:- }$ If RADIUS of Hydrogen = 53pm Then...... $\huge\pink{Radius of He+ = ? }$ Radius of hydrogen or hydrogen like species is GIVEN by :- {(52.9pm)(n square)} /Z n = 1 , Z for HELIUM = 2 52.9/2 = 26.45 Therefore $\huge\blue{Radius of He+ is 26.45pm }$ _______________ $\huge\purple{INSHALLAH it will help U}$

Discussion

6.	Draw structures of the following hydrocarbons:1) 3-Hexanone2) Heptanoic acid3) Pentanal4) 1,2-Pentanediol
Answer» Hey BUDDY here is UR answer in attachment Hope u like answer ND FIND helpful also ... ^_^

Discussion

7.	What is best reagent to covert nitril to primary amine?
Answer» LIALH4 is BEST I THINK

Discussion

8.	Name the scientist who prepared carbon compound first
Answer» Hey, here is your answer Friedrich WOHLER is the SCIENTIST who PREPARED CARBON compound in 1828. Hope it helps you

Discussion

9.	Nitrogen is chemically insert dueto
Answer» The triple bond is pretty strong. Therefore, it needs a lot of ENERGY to break those BONDS and participate in a reaction. So nitrogen is commonly referred to as and USED as an inert gas (high abundance & low cost.) However, it's not truly inert LIKE most NOBLE gases. :)

9.

Nitrogen is chemically insert dueto

Answer»

The triple bond is pretty strong. Therefore, it needs a lot of ENERGY to break those BONDS and participate in a reaction. So nitrogen is commonly referred to as and USED as an inert gas (high abundance & low cost.) However, it's not truly inert LIKE most NOBLE gases.

:)

Discussion

10.	Comparison of medeleeve and Henry Moseley periodic table..
Answer» med mos 1.elements r ARRANGED on the bases of here r atomic no. increasing atomic mass position of hydrogen could be explained H atom is plased above alkali metal 3. there r 7 groups and 6 PERIODS 18 groups and 7 periods 4.no distinguish position for metals metls r in left side and non and non metals metls in the RIGHT hand side may be helpfull

10.

Comparison of medeleeve and Henry Moseley periodic table..

Answer»

med mos

1.elements r ARRANGED on the bases of here r atomic no.

increasing atomic mass

position of hydrogen could be explained H atom is plased above alkali metal

3. there r 7 groups and 6 PERIODS 18 groups and 7 periods

4.no distinguish position for metals metls r in left side and non

and non metals metls in the RIGHT hand side

may be helpfull

Discussion

11.	What r the physical and chemical properties of carbon?with reaction plzzz
Answer» HEY mate here is your answer》》 The physical and CHEMICAL properties of carbon depend on the crystalline structure of the element. Its density fluctuates from 2.25 g/cm³ (1.30 ounces/in³) for GRAPHITE and 3.51 g/cm³ (2.03 ounces/in³) for diamond. The melting point of graphite is 3500ºC (6332ºF) and the extrapolated boiling point is 4830ºC (8726ºF). Hope this answer will help you..《《

Discussion

12.	Four examples of electropositive divalent radicals
Answer» AL2+, FE2+ GA2+, Cr2+ Hope this MAY HELPFUL

12.

Four examples of electropositive divalent radicals

Answer»

AL2+, FE2+ GA2+, Cr2+

Hope this MAY HELPFUL

Discussion

13.	Differentiate b/w electrode and electrolyte . with example
Answer» Electrode is the rod of METAL or terminal but electrolyte is the solution from which when electricity passed it completely breaks in ions example in GALVANIC CELL COPER rod is electrode and also zinc rod

Discussion

14.	Four examples of electro positive trivalent radicals
Answer» AL3+, FE3+ GA3+, CR3+ :)

14.

Four examples of electro positive trivalent radicals

Answer»

AL3+, FE3+ GA3+, CR3+

:)

Discussion

15.	What is geometry of carbon atom
Answer» HEY mate here is your answer》》 The central carbon will have 120 7deg BOND angles. The geometry around the first carbon is TETRAHEDRAL, around the second carbon atom is trigonal planar, and around the OXYGEN is bent. Hope this answer will help you..《《

Discussion

16.	What is a combination reaction guyssss plzzzzzzzzzzzzz tell..
Answer» HEYA MATES...UR ANSWER...here..

Discussion

17.	Why sodium form peroxide and Lithium forms monoxide
Answer» Lithium cannot form peroxide while sodium can because positive charge is located over small size of lithium and hence there is positive FIELD around it which will attract negative ion so strongly that it will not permit oxide ion to combine with another oxide ion Hence lithium forms monoxide while in case of sodium charge is located over COMPARATIVELY bigger ATOM which allows oxide ion to combine with another oxide ion hence.. Peroxide is formed While in other case superoxide is formed due to combination. Of two peroxide ions. :)

17.

Why sodium form peroxide and Lithium forms monoxide

Answer»

Lithium cannot form peroxide while sodium can because positive charge is located over small size of lithium and hence there is positive FIELD around it which will attract negative ion so strongly that it will not permit oxide ion to combine with another oxide ion

Hence lithium forms monoxide while in case of sodium charge is located over COMPARATIVELY bigger ATOM which allows oxide ion to combine with another oxide ion hence.. Peroxide is formed

While in other case superoxide is formed due to combination. Of two peroxide ions.

:)

Discussion

18.	What is the mass of Oxygen will be present with 6 gram of carbon in co2
Answer» Original ratio of CABON and oxygen mass in co2 = 12 : 32 NEW, ratio a/c to question = 6 : X , where, x = new mass of oxygen Since we know that, Ratio of mass of two elements in a compound always remains same . So , on comparing, 12/32 = 6/x 3/8 = 6/x 3/8×6 = 1/x 1/16 = 1/x 16 = x So, x = 16 u

Discussion

19.	For the rxn N2+3H2 is in equilibrium with 2NH3 (deltaH=92.4×5m/J) what are the favourable cases for ammonia?
Answer» As the formation of ammonia is an exothermic reaction, decreasing the TEMPERATURE and INCREASING the PRESSURE would FAVOUR more ammonia production.

Discussion

20.	Calculate the mass of 0.5 mole of O atoms.
Answer» MASS=Molar mass * no of moles =16*0.5gm =8gm :)

20.

Calculate the mass of 0.5 mole of O atoms.

Answer»

MASS=Molar mass * no of moles

=16*0.5gm

=8gm

:)

Discussion

21.	At 353 kelvin the ph of 0.001 M KOH will be
Answer» At 363, Kw = 3.80X10^-13 So, Kw = [H+][OH-] = 3.80X10^-13 In this SOLUTION, [OH-] = 0.001, so: [H+] = 3.8X10^-13 / 0.001 = 3.80X10^-10 PH = -log [H+] = 9.4 :)

21.

At 353 kelvin the ph of 0.001 M KOH will be

Answer»

At 363, Kw = 3.80X10^-13

So, Kw = [H+][OH-] = 3.80X10^-13

In this SOLUTION, [OH-] = 0.001, so:

[H+] = 3.8X10^-13 / 0.001 = 3.80X10^-10

PH = -log [H+] = 9.4

:)

Discussion

22.	Explain any two different between nuclear fusion and nuclear fission.
Answer» Nuclear FISSION - POLLUTION is high. Energy LIBERATE per gm is low. Ex-Atom BOMB Fusion-pollution is low Energy liberate per gm is high Ex-Hydrogen bomb

Discussion

23.	How much moles of hydrogen atoms will be there in 1 mole of hydrgen molecule
Answer» 1 MOLE of HYDROGEN will CONTAIN 6.023×10^-23 GRAM

Discussion

24.	Heya guys✌✌Q⬛What is Charles law?Explain with three examples.....♦Divjot♦
Answer» Charles law is a special case of ideal gas law . It states that the volume of a fixed mass of gas is directly proportional to the temperature. This law applies to ideal gases , held at a constant pressure , where only the temperature and volume are allowed to changed. This law is expressed as :- Vi/Ti = Vf/Tf where, Vi = initial volume Ti = initial absolute temperature Vf = final volume Tf = final absolute temperature It is important to remember that the temperatures are absolute temperature measured in Kelvin, not in Celsius or FAHRENHEIT . Example, A gas OCCUPIES 221 cm3 at a temperature of 0 C and pressure of 760 mm Hg. What will its volume be at 100 C? Solution, Since the pressure is constant and the mass of gas doesn't change, you know you can apply Charles' law. The temperatures are given in Celsius, so they must first be converted into absolute temperature (Kelvin) to apply the formula: V1 = 221cm3; T1 = 273K (0 + 273); T2 = 373K (100 + 273) Now the values can be plugged into the formula to solve for final volume: Vi/Ti = Vf/Tf 221cm3 / 273K = Vf / 373K Rearranging the equation to solve for final volume: Vf = (221 cm3)(373K) / 273K Vf = 302 cm3 I think 1 example is sufficient to understand. Hope it may help you . And i wanna know that in which class are you studying.... If you can answer me then please answer.

Discussion

25.	Why is atomic radius of sodium greater than that of zinc
Answer» There are so MANY FACTORS LIKE no of ELECTRONS,sheldingeffect,BONDS

Discussion

26.	Define Valcanization
Answer» ❤️hi mate ❤️ hope this helps you valcanization is a process USED to harden RUBBER. valcanization referred to the TREATMENT of rubber with SULFUR.

Discussion

27.	Determine the mass of 6.022×10^23 number of nitrogen molecules
Answer» ATOMIC mass of nitrogen is 14. Thus, the MOLECULAR mass of nitrogen molecule = 2 × 14 = 28 u

Discussion

28.	The gases liberated at anode in the electrolysis of sodium acetate are
Answer» GAS COMES out is HYDROGEN because this is a ACIDIC SOLUTION

Discussion

29.	Calculate the no. Of moles of iron in a sample containing 10^22 atoms of iron.
Answer» 1 MOLE of IRON = 6.02 * 10^23 ATOMS 10^22 atoms of iron = 10^22/6.02 * 10^23 = 1/60.2 = 0.0166 MOLES. Number of moles = 0.0166 moles.

29.

Calculate the no. Of moles of iron in a sample containing 10^22 atoms of iron.

Answer»

1 MOLE of IRON = 6.02 * 10^23 ATOMS

10^22 atoms of iron = 10^22/6.02 * 10^23

= 1/60.2

= 0.0166 MOLES.

Number of moles = 0.0166 moles.

Discussion

30.	What are the two elements of hydrocarbon
Answer» $\bold{Hey \: mate \: here \: is \:your \: ANSWER}$ HYDROCARBONS CONSIST of two elements carbon and hydrogen combined in DIFFERENT PROPORTION. $\large{\red{\boxed{\mathbb{HOPE \:IT \:HELPS}}}}$ $PLEASE MARK AS BRAINLIEST$

Discussion

31.	What is article in chemistry
Answer» Chemistry. Chemistry is a branch of SCIENCE that involves the study of the composition, structure and properties of matter. Often KNOWN as the central science, it is a creative discipline CHIEFLY concerned with atomic and MOLECULAR structure and its change, for INSTANCE through chemical reactions.

Discussion

32.	Calculate the no. Of particles present in 56 g of nitrogen molecule.
Answer» $\huge\pink{As-Salamu-Alykum}$ ___________ $\huge\green{Given:-}$ MASS of N2 = 56g MOLAR mass of N2 = 14×2=28g/mol $\huge\orange{Required:-}$ NUMBER of particles =? $\huge\red{Formula:- }$ MOLES of N2 = no. of particles /Avagadro number $\huge\purple{Solution:-}$ Moles of N2 = mass / molar mass Moles of N2 = 56 / 28 Moles of N2 = 2 mol Now....... Moles of N2 = number of particles / Avagadro number Number of particles = Moles of N2 × Avagadro number Number of particles = 2 × 6.023 ×10^23 $\huge\violet{Number of particles of N2 = 12.04 × 10^23}$ ________________ $\huge\brown{INSHALLAH it will help U}$

Discussion

33.	What are the importance of space research
Answer» Space research is very important for our CURIOSITY of the beyond the VISIBLE as well as the future of the earth. Followings are some of important aim of space research. 1. Promote Science Education and Knowledge of space 2. Culture and inspiration, GLOBAL partnership 3. Weather satellites and Environmental Research 4. NATURAL Resources 5. International Space Station, COMMUNICATION and our perspective

33.

What are the importance of space research

Answer»

Space research is very important for our CURIOSITY of the beyond the VISIBLE as well as the future of the earth.

Followings are some of important aim of space research.

1. Promote Science Education and Knowledge of space

2. Culture and inspiration, GLOBAL partnership

3. Weather satellites and Environmental Research

4. NATURAL Resources

5. International Space Station, COMMUNICATION and our perspective

Discussion

34.	The freezing point of a 0.01 M aqueous solution of Nacl will be‚
Answer» DELTA T = m X KF a. The 0.1m NaCl is 0.2m in ions delta T = 0.2 m x 1.86 C/m = 0.372C fp = -0.372C

34.

The freezing point of a 0.01 M aqueous solution of Nacl will be‚

Answer»

DELTA T = m X KF

a. The 0.1m NaCl is 0.2m in ions

delta T = 0.2 m x 1.86 C/m = 0.372C

fp = -0.372C

Discussion

35.	What is the hybrid state of carbon 1 and 2 in ethanal
Answer» Explanation: $sp^3$ Hybridization of carbon atom with four single bonds = $sp^2$ Hybridization of carbon atom with TWO single bonds and one DOUBLE BOND = $sp$ Hybridization of carbon atom with one single bond and one triple bond = In the molecule of an ethanal that is $CH_3CHO$ , their are two carbon atoms. Carbon atom marked as $C_1$ is forming 4 single bonds with three hydrogen atoms and one with another carbon atom that $C_2$ . $C_1$ $sp^3$ Hence, the hybridization of is . Carbon atom marked as $C_2$ is forming one double bond with an oxygen atom and two single bonds with one hydrogen atom and one with $C_1$ atom. $C_2$ $sp^2$ Hence, the hybridization of is .

35.

What is the hybrid state of carbon 1 and 2 in ethanal

Answer»

Explanation:

$sp^3$ Hybridization of carbon atom with four single bonds =

$sp^2$ Hybridization of carbon atom with TWO single bonds and one DOUBLE BOND =

$sp$ Hybridization of carbon atom with one single bond and one triple bond =

In the molecule of an ethanal that is $CH_3CHO$ , their are two carbon atoms. Carbon atom marked as $C_1$ is forming 4 single bonds with three hydrogen atoms and one with another carbon atom that $C_2$ . $C_1$ $sp^3$ Hence, the hybridization of is .

Carbon atom marked as $C_2$ is forming one double bond with an oxygen atom and two single bonds with one hydrogen atom and one with $C_1$ atom. $C_2$ $sp^2$ Hence, the hybridization of is .

Discussion

36.	What will be oxide of k in manslev table
Answer» K2O hope it HELPFUL for U plz mark me as a BRAIN LIST

Discussion

37.	How will you convert ethyl chloride in to Ethane
Answer» Ethyl chloride REACT with ALC Koh GIVE ethene and when ethene react [h] in PRESENCE of nickel it give ethane hoPe it's heLps

Discussion

38.	A silver sample contain 90% of Silver and the rest Mercury.How many atoms of silver are present in 1 gram of this sample of Silver?Please solve with accurate steps!!
Answer» $\huge\red{As-Salamu-Alykum}$ _____________ $\huge\pink{Given }$ In SAMPLE 90% silver means that mass of silver is 0.9g and 0.1 G is MERCURY So....... Mass of Ag = 0.9g Molar mass of Ag = 107g/mol $\huge\blue{Required:-}$ Atoms of silver =? $\huge\orange{Solution:-}$ Moles of Ag = mass / molar mass Moles of Ag = 0.9/107 Moles of Ag = 0.0084mol Now ...... Moles of Ag = number of atoms of Ag / Avagadro number Number of atoms of silver = moles of Ag × Avagadro number Number of atoms of Ag = 0.0084 × 6.023 ×10^23 Number of atoms of Ag = 0.05 ×10^23 Number of atoms of Ag = 5 ×10^21 ___________ $\huge\red{INSHALLAH it will help U}$

Discussion

39.	How does concentrated HNO3 oxidises non metal give example
Answer» Concentrated nitric acid is strong oxidising agent, especially in hot CONDITION. In these acids, the central atoms-nitrogen and sulphur- are in their maximum oxidation states of +5 and +6 respectively. So, their reactions with nonmetals like carbon or sulphur are TYPICAL REDOX reactions in which such moderately electronegative nonmetals are FORCED to behave as reducing agents EXAMPLE C + 4HNO3 = CO2 + 4NO2 + 2H2O :)

39.

How does concentrated HNO3 oxidises non metal give example

Answer»

Concentrated nitric acid is strong oxidising agent, especially in hot CONDITION. In these acids, the central atoms-nitrogen and sulphur- are in their maximum oxidation states of +5 and +6 respectively. So, their reactions with nonmetals like carbon or sulphur are TYPICAL REDOX reactions in which such moderately electronegative nonmetals are FORCED to behave as reducing agents

EXAMPLE

C + 4HNO3 = CO2 + 4NO2 + 2H2O

:)

Discussion

40.	Write general formula for series alkane , alkene and alkyne
Answer» GENERAL formula For ALKANE is CNH(2n+2) ; n is integer, n= 1, 2, 3…. For alkene it is CnH(2n) ; n = 2, 3, 4… For alkyne it is CnH(2n-2) ; n = 2,3,4… Since, alkene and alkynes refers to double bonded CARBONS & triple bonded carbons respectively, there must be at least 2 carbon ATOMS. :)

40.

Write general formula for series alkane , alkene and alkyne

Answer»

GENERAL formula

For ALKANE is CNH(2n+2) ; n is integer, n= 1, 2, 3….

For alkene it is CnH(2n) ; n = 2, 3, 4…

For alkyne it is CnH(2n-2) ; n = 2,3,4…

Since, alkene and alkynes refers to double bonded CARBONS & triple bonded carbons respectively, there must be at least 2 carbon ATOMS.

:)

Discussion

41.	Give the electronic configuration of al atom and its ion O atom and its ion
Answer» Answer: 1) Al ATOM and its ion : Al atom : K - 2, L- 8, M - 3 Al ion : K - 2, L - 8 2) O atom and its ion : O atom : K - 2, L - 6 O ion : K - 2, L - 8 Explanation: HOPE IT HELPS U, FRND!

41.

Give the electronic configuration of al atom and its ion O atom and its ion

Answer»

Answer:

1) Al ATOM and its ion :

Al atom : K - 2, L- 8, M - 3

Al ion : K - 2, L - 8

2) O atom and its ion :

O atom : K - 2, L - 6

O ion : K - 2, L - 8

Explanation:

HOPE IT HELPS U, FRND!

Discussion

42.	State law of coservation of mass with scientist name?
Answer» Antoine Lavoisier, the scientist credited with the DISCOVERY of the law of CONSERVATION of MASS. This law STATES that, despite chemical reactions or physical transformations, mass is conserved — that is, it cannot be created or destroyed — within an ISOLATED system. Hope it helps :)

42.

State law of coservation of mass with scientist name?

Answer»

Antoine Lavoisier, the scientist credited with the DISCOVERY of the law of CONSERVATION of MASS. This law STATES that, despite chemical reactions or physical transformations, mass is conserved — that is, it cannot be created or destroyed — within an ISOLATED system.

Hope it helps

:)

Discussion

43.	The mixture of three gas nitrogen oxygen and carbon dioxide is
Answer» Answer. Atmosphere(NITROGEN 78% OXYGEN 21% Carbon dioxide 0.03 %)

Discussion

44.	An atmospheric pollutant produced in lightning discharge
Answer» NITROGEN OXIDES A natural source of nitrogen oxides occurs from a lightning stroke. The very HIGH temperature in the VICINITY of a lightning BOLT causes the gases OXYGEN and nitrogen in the air to react to form nitric oxide. The nitric oxide very quickly reacts with more oxygen to form nitrogen dioxide. :)

44.

An atmospheric pollutant produced in lightning discharge

Answer»

NITROGEN OXIDES

A natural source of nitrogen oxides occurs from a lightning stroke. The very HIGH temperature in the VICINITY of a lightning BOLT causes the gases OXYGEN and nitrogen in the air to react to form nitric oxide. The nitric oxide very quickly reacts with more oxygen to form nitrogen dioxide.

:)

Discussion

45.	What is the d2sp3 hybridization of [cr (co)6]??explain?
Answer» It is a TYPE of HYBRIDIZATION.......

Discussion

46.	Name one element in which corrosion is not proved to be wasteful Explain
Answer» The thin (GENERALLY INVISIBLE) layer of aluminum OXIDE corrosion on aluminum protects the aluminum from further corrosion. It will even ALLOW aluminum to resist nitric acid because nitric acid is a very strong oxidizer that actually strengthens the corrosion coating. Other acids dissolve aluminum easily because they ALSO dissolve aluminum oxide. :)

46.

Name one element in which corrosion is not proved to be wasteful Explain

Answer»

The thin (GENERALLY INVISIBLE) layer of aluminum OXIDE corrosion on aluminum protects the aluminum from further corrosion. It will even ALLOW aluminum to resist nitric acid because nitric acid is a very strong oxidizer that actually strengthens the corrosion coating. Other acids dissolve aluminum easily because they ALSO dissolve aluminum oxide.

:)

Discussion

47.	Why atomicity of Na2O is 2
Answer» Na20- ATOMICITY of SODIUM is 1 and of oxugen is 2. as there are 2 Na ATOMS, overall atomicity of COMPOUND is 2 Hope it helps :)

47.

Why atomicity of Na2O is 2

Answer»

Na20- ATOMICITY of SODIUM is 1 and of oxugen is 2.

as there are 2 Na ATOMS, overall atomicity of COMPOUND is 2

Hope it helps

:)

Discussion

48.	Name the salt which have ph value 14
Answer» I THINK NaCL. HOPE IT HELPS YOU

Discussion

49.	The main excretory product in human beings is __urea__. (vi) sweat contains water and __salts__. (vii) kidneys eliminate the waste materials in the liquid form called __urine__.
Answer» Answer: v)The major wastes produced by US are: CARBON dioxide and Urea. vi)Sweat CONTAINS water and salts. vii) Kidneys eliminate the WASTE materials in the liquid form called URINE.

49.

The main excretory product in human beings is urea. (vi) sweat contains water and salts. (vii) kidneys eliminate the waste materials in the liquid form called urine.

Answer»

Answer:

v)The major wastes produced by US are: CARBON dioxide and Urea.

vi)Sweat CONTAINS water and salts.

vii) Kidneys eliminate the WASTE materials in the liquid form called URINE.

Discussion

50.	The aromic no of element is 17 the number of orbitals containing electron pairs in the valency shell
Answer» 2in FIRST shell 8 in the second 7 in the third and valency IS1

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The most prominent gases in the atmosphere in terms of volume are

How to prepare chemistry for exam.. Of class 11...

Why do helium change our voice?

Give one example of artificial sweeteners

If the radius of hydrogen atom is 53 pm, the radius of he+ ion is close to

Draw structures of the following hydrocarbons:1) 3-Hexanone2) Heptanoic acid3) Pentanal4) 1,2-Pentanediol

What is best reagent to covert nitril to primary amine?

Name the scientist who prepared carbon compound first

Nitrogen is chemically insert dueto

Comparison of medeleeve and Henry Moseley periodic table..

What r the physical and chemical properties of carbon?with reaction plzzz

Four examples of electropositive divalent radicals

Differentiate b/w electrode and electrolyte . with example

Four examples of electro positive trivalent radicals

What is geometry of carbon atom

What is a combination reaction guyssss plzzzzzzzzzzzzz tell..

Why sodium form peroxide and Lithium forms monoxide

What is the mass of Oxygen will be present with 6 gram of carbon in co2

For the rxn N2+3H2 is in equilibrium with 2NH3 (deltaH=92.4×5m/J) what are the favourable cases for ammonia?

Calculate the mass of 0.5 mole of O atoms.

At 353 kelvin the ph of 0.001 M KOH will be

Explain any two different between nuclear fusion and nuclear fission.

How much moles of hydrogen atoms will be there in 1 mole of hydrgen molecule

Heya guys✌✌Q⬛What is Charles law?Explain with three examples.....♦Divjot♦

Why is atomic radius of sodium greater than that of zinc

Define Valcanization

Determine the mass of 6.022×10^23 number of nitrogen molecules

The gases liberated at anode in the electrolysis of sodium acetate are

Calculate the no. Of moles of iron in a sample containing 10^22 atoms of iron.

What are the two elements of hydrocarbon

What is article in chemistry

Calculate the no. Of particles present in 56 g of nitrogen molecule.

What are the importance of space research

The freezing point of a 0.01 M aqueous solution of Nacl will be‚

What is the hybrid state of carbon 1 and 2 in ethanal

What will be oxide of k in manslev table

How will you convert ethyl chloride in to Ethane

A silver sample contain 90% of Silver and the rest Mercury.How many atoms of silver are present in 1 gram of this sample of Silver?Please solve with accurate steps!!

How does concentrated HNO3 oxidises non metal give example

Write general formula for series alkane , alkene and alkyne

Give the electronic configuration of al atom and its ion O atom and its ion

State law of coservation of mass with scientist name?

The mixture of three gas nitrogen oxygen and carbon dioxide is

An atmospheric pollutant produced in lightning discharge

What is the d2sp3 hybridization of [cr (co)6]??explain?

Name one element in which corrosion is not proved to be wasteful Explain

Why atomicity of Na2O is 2

Name the salt which have ph value 14

The main excretory product in human beings is __urea__. (vi) sweat contains water and __salts__. (vii) kidneys eliminate the waste materials in the liquid form called __urine__.

The aromic no of element is 17 the number of orbitals containing electron pairs in the valency shell

The main excretory product in human beings is urea. (vi) sweat contains water and salts. (vii) kidneys eliminate the waste materials in the liquid form called urine.