52639 + Interview Questions in Secondary School in Chemistry

1.	Give two reaction that show the acidic nature of phenol. compare acidity of phenol with that of ethanol
Answer» I will SAY you answer TOMORROW today I WANT REST PLEASE follow me I follow you

Discussion

2.	ARRANGE IN ORDER OF INCREASING IONIZATION POTENTIAL; K, Cs, Li
Answer» Answer: Li>k>cs EXPLANATION: the above order is due to the reason that the atomic RADIUS increases down the group and INVERSELY proportional to the IONISATION POTENTIAL

2.

ARRANGE IN ORDER OF INCREASING IONIZATION POTENTIAL; K, Cs, Li

Answer»

Answer:

Li>k>cs

EXPLANATION:

the above order is due to the reason that the atomic RADIUS increases down the group and INVERSELY proportional to the IONISATION POTENTIAL

Discussion

3.	A 25% alcohol solution means
Answer» ANSWER: PURE alcohol Explanation: but in water VINEGAR which is used in the PRESERVATION of the PICKLES

3.

A 25% alcohol solution means

Answer»

ANSWER:

PURE alcohol

Explanation:

but in water VINEGAR which is used in the PRESERVATION

of the PICKLES

Discussion

4.	Seperating Technique To Seperate Sulphur And Camphor
Answer» Answer : HEAT is the BEST WAY to separate sulphur and camphor because camphor EVAPORATES.

4.

Seperating Technique To Seperate Sulphur And Camphor

Answer»

Answer : HEAT is the BEST WAY to separate sulphur and camphor because camphor EVAPORATES.

Discussion

5.	Define Decomposition reaction ( In a simple way )
Answer» Explanation: In the reaction one reactant and FORM two and more product is CALLED as DICOMPOSITION reaction

5.

Define Decomposition reaction ( In a simple way )

Answer»

Explanation:

In the reaction one reactant and FORM two and more product is CALLED as DICOMPOSITION reaction

Discussion

6.	Why does distilled water not conduct electricity ? whereas rain water does
Answer» BECAUSE IT IS PURE AND DOESN'T CONTAIN ANY MINERALS FOLLOW ME THANK YOU

6.

Why does distilled water not conduct electricity ? whereas rain water does

Answer»

BECAUSE IT IS PURE AND DOESN'T CONTAIN ANY MINERALS

FOLLOW ME

THANK YOU

Discussion

7.	Levis structure for H2 C2 o4 2 H2O
Answer» ANSWER: this is the answer.. the LEWIS DOT STRUCTURES

7.

Levis structure for H2 C2 o4 2 H2O

Answer»

ANSWER:

this is the answer.. the LEWIS DOT STRUCTURES

Discussion

8.	Kharash effect example
Answer» ANSWER:The Kharasch ADDITION is an organic reaction and a metal-catalysed free RADICAL addition of CXCl3 compounds (X = CL, Br, H) to alkenes. ... and proceeds through the CXCl2 free radical. Examples of organohalides are carbon tetrachloride and chloroform. Explanation:

8.

Kharash effect example

Answer»

ANSWER:The Kharasch ADDITION is an organic reaction and a metal-catalysed free RADICAL addition of CXCl3 compounds (X = CL, Br, H) to alkenes. ... and proceeds through the CXCl2 free radical. Examples of organohalides are carbon tetrachloride and chloroform.

Explanation:

Discussion

9.	For the formation of CH, of deltaU° = -x kJ mol-1then what will be value of deltaH° kJ mol-1.(1) -x - RT(2) -x + 2RT(3) -x + RT(4) -2x - 4RT
Answer» EXPLANATION: here is the ANSWER for your QUESTION

9.

For the formation of CH, of deltaU° = -x kJ mol-1then what will be value of deltaH° kJ mol-1.(1) -x - RT(2) -x + 2RT(3) -x + RT(4) -2x - 4RT

Answer»

EXPLANATION:

here is the ANSWER for your QUESTION

Discussion

10.	B2H6+NH2=complete the reaction
Answer» Answer: B2H6 + NH3 --------> B3N3H6 Borazene Inorganic BENZENE Explanation: it is ALSO isoelectronic polarity gives it better solvent than benzene same STRUCTURE as benzene

10.

B2H6+NH2=complete the reaction

Answer»

Answer:

B2H6 + NH3 --------> B3N3H6

Borazene

Inorganic BENZENE

Explanation:

it is ALSO isoelectronic

polarity gives it better solvent than benzene

same STRUCTURE as benzene

Discussion

11.	How does the decrease in surface tension benefit washing of clothes?
Answer» On INCREASING temperature surface tension of soap solution decrease because FORCE of attraction between soap MOLECULES decrease. Thus HOT water colleases with mare dirt particles and is used to wash dirty clothes. MARK ME BRAINLIEST ✌✌✌✌✌✌

11.

How does the decrease in surface tension benefit washing of clothes?

Answer»

On INCREASING temperature surface tension of soap solution decrease because FORCE of attraction between soap MOLECULES decrease.

Thus HOT water colleases with mare dirt particles and is used to wash dirty clothes.

MARK ME BRAINLIEST ✌✌✌✌✌✌

Discussion

12.	how do you balance the equation nitrogen oxide gas reacts with carbon monoxide gas to produce nitrogen gas and carbon dioxide gas.
Answer» Answer:2NO2+4CO--4CO2+N2 Hope HELPS...

12.

how do you balance the equation nitrogen oxide gas reacts with carbon monoxide gas to produce nitrogen gas and carbon dioxide gas.

Answer»

Answer:2NO2+4CO--4CO2+N2

Hope HELPS...

Discussion

13.	51) Find the molecular mass of the acid. Givencondition is 1.25 of solid basis acid is completelyneutralised by 25 ml of 0.25 molar Ba(OH)2solution.A) 150B) 120C) 200D) 100
Answer» YOUR ANSWER IS IN THE ATTACHMENT PLZZ REFER TO THE ATTACHMENT MARK ME BRAINLIEST ✌✌✌✌ OPTION C IS CORRECT IGNORE THAT CALCULATION

13.

51) Find the molecular mass of the acid. Givencondition is 1.25 of solid basis acid is completelyneutralised by 25 ml of 0.25 molar Ba(OH)2solution.A) 150B) 120C) 200D) 100

Answer»

YOUR ANSWER IS IN THE ATTACHMENT PLZZ REFER TO THE ATTACHMENT

MARK ME BRAINLIEST ✌✌✌✌

OPTION C IS CORRECT

IGNORE THAT CALCULATION

Discussion

14.	In which of the following reaction only one product is formeda) Displacement reaction, (bCombination reaction, (c) Precipitate reaction, (d) Decomposition
Answer» ANSWER: a DISPLACEMENT REACTION

14.

In which of the following reaction only one product is formeda) Displacement reaction, (bCombination reaction, (c) Precipitate reaction, (d) Decomposition

Answer»

ANSWER:

a DISPLACEMENT REACTION

Discussion

15.	Pick up the odd one out and tell the scientific reason a book on a table ,moving train , flying bird ,falling leaves
Answer»

Discussion

16.	How much 0.1m hcl in ml is required to neutralize 1 gm of equimolar mixture of na2co3 and nahco3
Answer» REFER to the attachment. ❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️ FOLLOW ME ON INSTA @malikmoh.aman

16.

How much 0.1m hcl in ml is required to neutralize 1 gm of equimolar mixture of na2co3 and nahco3

Answer»

REFER to the attachment.

❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️

FOLLOW ME ON INSTA @malikmoh.aman

Discussion

17.	What is the end product during catalytic oxidation of methane
Answer» Answer: Explanation: since METHANE is HYDROCARBON so it will OXIDISE into CO2 and H2O BRAINLY...

17.

What is the end product during catalytic oxidation of methane

Answer»

Answer:

Explanation:

since METHANE is HYDROCARBON so it will OXIDISE into CO2 and H2O

BRAINLY...

Discussion

18.	Give one axample of nucleophilic substitution reaction of alkyl halide
Answer» Answer: *Heyaa♡♡ Here* is *the* *example* :- *2-bromopropane has UNDERGONE an elimination reaction to GIVE an alkene - propene.* *Hope* it *helped* *you*.

18.

Give one axample of nucleophilic substitution reaction of alkyl halide

Answer»

Answer:

Heyaa♡♡

Here is the example :-

2-bromopropane has UNDERGONE an elimination reaction to GIVE an alkene - propene.

Hope it helped you.

Discussion

19.	Calculate the enthalpy of combustion of ethylene gas to form CO2, and H2Oat 298K and 1 atm pressure. the enthalpies of formation of CO2, H2O and C2H4 are -393.7, -241.8 and +52.3 kJ per moles respectively.
Answer» ANSWER: this you will find in the MOLE content of10th CLASS physical science text BOOK hope it will HELP you

19.

Calculate the enthalpy of combustion of ethylene gas to form CO2, and H2Oat 298K and 1 atm pressure. the enthalpies of formation of CO2, H2O and C2H4 are -393.7, -241.8 and +52.3 kJ per moles respectively.

Answer»

ANSWER:

this you will find in the MOLE content of10th CLASS physical science text BOOK hope it will HELP you

Discussion

20.	6. किसी तत्त्व का आवर्त सारणी में स्थान की सहायता से उसकेगुणों का पूर्वानुमान कैसे किया जा सकता है?
Answer» ANSWER: द्रव्यमान और घनत्व के आधार पर

20.

6. किसी तत्त्व का आवर्त सारणी में स्थान की सहायता से उसकेगुणों का पूर्वानुमान कैसे किया जा सकता है?

Answer»

ANSWER:

द्रव्यमान और घनत्व के आधार पर

Discussion

21.	Definition of and metals nonmetals
Answer» Answer: Metal is a solid material which conduct HEAT & electricity ,hard, shiny, malleable, fusible, and DUCTILE. Nonmetal is a substance that do not EXHIBIT properties of metals such as hardness, luster, malleability ,DUCTILITY and the ABILITY to conduct electricity. Explanation: please add me to brainliest

21.

Definition of and metals nonmetals

Answer»

Answer:

Metal is a solid material which conduct HEAT & electricity ,hard, shiny, malleable, fusible, and DUCTILE. Nonmetal is a substance that do not EXHIBIT properties of metals such as hardness, luster, malleability ,DUCTILITY and the ABILITY to conduct electricity.

Explanation:

please add me to brainliest

Discussion

22.	Gap between Bohr's atomic radii of he +ve of 3rd orbit and 5 orbit will be.
Answer» HEYA, BOHR's ORBIT for a orbit n of ELEMENT having atomic number z is GIVEN by :- ( in angstrom) $\frac{0.529 {n}^{2} }{z}$ For He, z = 2, for n = 3 $\frac{.529 \times 9}{2} \\ \\ for \: n = 5 \\ \\ \frac{.529 \times 25}{2} \\ \\ hence \: gap = \frac{0.529( \frac{25}{2} - \frac{9}{2}) }{} \\ \\ = 0.529 \times 8 \\ = 4.232 \: angstrom$ Regards Kshitij

22.

Gap between Bohr's atomic radii of he +ve of 3rd orbit and 5 orbit will be.

Answer»

HEYA,

BOHR's ORBIT for a orbit n of ELEMENT having atomic number z is GIVEN by :- ( in angstrom)

$\frac{0.529 {n}^{2} }{z}$

For He, z = 2,

for n = 3

$\frac{.529 \times 9}{2} \\ \\ for \: n = 5 \\ \\ \frac{.529 \times 25}{2} \\ \\ hence \: gap = \frac{0.529( \frac{25}{2} - \frac{9}{2}) }{} \\ \\ = 0.529 \times 8 \\ = 4.232 \: angstrom$

Regards

Kshitij

Discussion

23.	Explain nuclear mode of atom
Answer» Answer: Rutherford's atomic model became known as the NUCLEAR model. In this model, the protons and neutrons, which comprise nearly all of the MASS of the atom, are LOCATED in a NUCLEUS at the center of the atom. The electrons are distributed around the nucleus and OCCUPY most of the volume of the atom. HOPE IT HELPS MARK ME BRAINLOEST

23.

Explain nuclear mode of atom

Answer»

Answer:

Rutherford's atomic model became known as the NUCLEAR model. In this model, the protons and neutrons, which comprise nearly all of the MASS of the atom, are LOCATED in a NUCLEUS at the center of the atom. The electrons are distributed around the nucleus and OCCUPY most of the volume of the atom.

HOPE IT HELPS

MARK ME BRAINLOEST

Discussion

24.	The amount of product formation in a reversible reactionwhen the periodicremoval of the product takes place.a) increasesb) decreasesc)first decreases then increasesd) first increases and then decreases
Answer» ANSWER: ANSWERS is FIRST DECREASES then INCREASES

24.

The amount of product formation in a reversible reactionwhen the periodicremoval of the product takes place.a) increasesb) decreasesc)first decreases then increasesd) first increases and then decreases

Answer»

ANSWER:

ANSWERS is FIRST DECREASES then INCREASES

Discussion

25.	Easy trick to learn Group 18 of periodic table.
Answer» YOUR ANSWER IS IN THE ATTACHMENT PLZZ REFER TO THE ATTACHMENT MARK ME BRAINLIEST ✌✌✌

25.

Easy trick to learn Group 18 of periodic table.

Answer»

YOUR ANSWER IS IN THE ATTACHMENT PLZZ REFER TO THE ATTACHMENT

MARK ME BRAINLIEST ✌✌✌

Discussion

26.	Can we replace the potassium permanganatewith any other substance to release oxygen
Answer» Explanation: TREES release oxygen when they use energy from sunlight to make glucose from CARBON dioxide and water. Like all PLANTS, trees also use oxygen when they SPLIT glucose BACK down to release energy to power their metabolisms.

26.

Can we replace the potassium permanganatewith any other substance to release oxygen

Answer»

Explanation:

TREES release oxygen when they use energy from sunlight to make glucose from CARBON dioxide and water. Like all PLANTS, trees also use oxygen when they SPLIT glucose BACK down to release energy to power their metabolisms.

Discussion

27.	Write position isomers of Propanol.
Answer» Answer: Hey DEAR here is ur answer : Propanol has two POSITION isomers : PROPAN- 1-ol, CH3CH2CH2OH. propan- 2-ol, CH3CH(OH)CH. ❤️*Please* mark me as a brainlist and follow me ❤️

27.

Write position isomers of Propanol.

Answer»

Answer:

Hey DEAR here is ur answer :

Propanol has two POSITION isomers :

PROPAN- 1-ol, CH3CH2CH2OH.
propan- 2-ol, CH3CH(OH)CH.

❤️Please mark me as a brainlist and follow me ❤️

Discussion

28.	for 118%labelled oleum if the number of miles of H2SO4&free SO3 be X&Y what is the value of X+Y/X-Y
Answer» ANSWER: you you you you you you you

28.

for 118%labelled oleum if the number of miles of H2SO4&free SO3 be X&Y what is the value of X+Y/X-Y

Answer»

ANSWER:

you you you you you you you

Discussion

29.	Li Cl is more covalent than Kel. Why?
Answer» ANSWER: Don't KNOW EXPLANATION: FOLLOW me as you can follow

29.

Li Cl is more covalent than Kel. Why?

Answer»

ANSWER:

Don't KNOW

EXPLANATION:

FOLLOW me as you can follow

Discussion

30.	9. What is biodegradable polymer? Give one example.
Answer» The COMMON examples of aliphaticbiodegradable polymers are polyglycolic acid(PGA), POLYHYDROXY butyrate (PHB), Polyhydroxy butyrates-co-beta hydroxyl valerate( PHBV), Polycaprolactone(PCL), Nylon-2-nylon-6. Explanation: follow me narks as brainlist

30.

9. What is biodegradable polymer? Give one example.

Answer»

The COMMON examples of aliphaticbiodegradable polymers are polyglycolic acid(PGA), POLYHYDROXY butyrate (PHB), Polyhydroxy butyrates-co-beta hydroxyl valerate( PHBV), Polycaprolactone(PCL), Nylon-2-nylon-6.

Explanation:

follow me narks as brainlist

Discussion

31.	I. What is Peroxide or Kharash effect with example?
Answer» Answer: Peroxide is one of the state of oxygen in combined FORM with another oxygen atom so as to attain a net oxidation state of '1'. –O–O– E.g. Hydrogen Peroxide(H₂O₂) H–O–O–H *** Kharash Effect or also also popularly named as anti markownikoff's rule is the effect when alkenes REACT with alkyl halides asymmetrically in the presence of peroxides( mostly of benzenes). It happens only with the addition of HBR. The REACTION proceeds via free radical MECHANISM.

31.

I. What is Peroxide or Kharash effect with example?

Answer»

Answer:

Peroxide is one of the state of oxygen in combined FORM with another oxygen atom so as to attain a net oxidation state of '1'.

–O–O–

E.g. Hydrogen Peroxide(H₂O₂)

H–O–O–H

***

Kharash Effect or also also popularly named as anti markownikoff's rule is the effect when alkenes REACT with alkyl halides asymmetrically in the presence of peroxides( mostly of benzenes). It happens only with the addition of HBR. The REACTION proceeds via free radical MECHANISM.

Discussion

32.	1. Define antiseptics and disinfectants.
Answer» Answer: $\huge{\boxed{\mathcal\pink{♡}{\purple{hey!¡!}\pink{♡}}}}$ Explanation: Disinfectants and antiseptics are both USED for KILLING the microbes but still, there is a difference between them. An antiseptic is used for killing the microbes on the LIVING tissues whereas a disinfectant is applied on a non-living object.! THANKS ❤

32.

1. Define antiseptics and disinfectants.

Answer»

Answer:

$\huge{\boxed{\mathcal\pink{♡}{\purple{hey!¡!}\pink{♡}}}}$

Explanation:

Disinfectants and antiseptics are both USED for KILLING the microbes but still, there is a difference between them. An antiseptic is used for killing the microbes on the LIVING tissues whereas a disinfectant is applied on a non-living object.!

THANKS ❤

Discussion

33.	Why oxygen is formed in oxide form.
Answer» Answer:Featured snippet from the web.The DECAY of organic matter is a highly complex chemical phenomenon, with a LARGE variety of chemical products formed in the reaction. Inorganic MATERIALS ALSO react slowly with oxygen. When iron and certain other metals are exposed to oxygen (in the presence of water), they form oxides Explanation:

33.

Why oxygen is formed in oxide form.

Answer»

Answer:Featured snippet from the web.The DECAY of organic matter is a highly complex chemical phenomenon, with a LARGE variety of chemical products formed in the reaction. Inorganic MATERIALS ALSO react slowly with oxygen. When iron and certain other metals are exposed to oxygen (in the presence of water), they form oxides

Explanation:

Discussion

34.	SHURT ANSVERTEL1. Briefly discuss elevation in boiling point.
Answer» ANSWER: decrease of surface tension Explanation: when a non volatile solute is added to solvent then the solute PARTICLE DECREASES the surface tension of the solvent SINCE the surface tension decreases the more heat is require to boil the solvent to its boiling POINT and thus this is how elevation in boiling point occur.

34.

SHURT ANSVERTEL1. Briefly discuss elevation in boiling point.

Answer»

ANSWER:

decrease of surface tension

Explanation:

when a non volatile solute is added to solvent then the solute PARTICLE DECREASES the surface tension of the solvent

SINCE the surface tension decreases the more heat is require to boil the solvent to its boiling POINT and thus this is how elevation in boiling point occur.

Discussion

35.	What method is used to separate Sulphur and camphor
Answer» SUBLIMATION can be USED

Discussion

36.	The total number of atoms per unit cell of a fase center cubic crystal is
Answer» ANSWER: 4 ATOMS are present in face center CRYSTALS Explanation: HOPE the answer will help you

36.

The total number of atoms per unit cell of a fase center cubic crystal is

Answer»

ANSWER:

4 ATOMS are present in face center CRYSTALS

Explanation:

HOPE the answer will help you

Discussion

37.	....,...is not ferroelectric compoundRochelle saltK4[Fe(CN)6]BaTiO3KH2PO4
Answer» It is a spontaneous electric POLARIZATION of a material that can be reversed by the application of an external electric field. Hence the ANSWER is..... K₄[FE(CN)₆]

37.

....,...is not ferroelectric compoundRochelle saltK4[Fe(CN)6]BaTiO3KH2PO4

Answer»

It is a spontaneous electric POLARIZATION of a material that can be reversed by the application of an external electric field.

Hence the ANSWER is..... K₄[FE(CN)₆]

Discussion

38.	Aloha !Explain, with suitable examples, the following:i) Electron deficient ii) Electron-precise iii)Electron-rich hydrides With Examples
Answer» Explanation: Hey bro!!! (i) Electron-deficient compounds of hydrogen: - The hydrides of some compounds are deficient of electrons as these elements like gp 13 elements do not have enough electrons. Examples are BH3 and AlH3 . . These compounds exist in polymeric form to make up for the deficiency of electrons. Example B2H6, B4H10 . (ii) Electron- precise compounds of hydrogen :- The elements which form hydrides have exact number of electrons required for forming BOND. Example of such elements are C and Si.They form CH4 and SiH4.The electrons are Precise and hence they are CALLED as electron- precise compounds of hydrogen. (iii) Electron-rich compounds of hydrogen :- Some elements like N, P S Cl ETC have more electrons than required for bonding. Some of their compounds are NH3, PH3, and HCl. Since there is a excess of electrons these hydrides are called electron-rich compounds of hydrogen. keep LOVING.....❣️☺️

38.

Aloha !Explain, with suitable examples, the following:i) Electron deficient ii) Electron-precise iii)Electron-rich hydrides With Examples

Answer»

Explanation:

Hey bro!!!

(i) Electron-deficient compounds of hydrogen: - The hydrides of some compounds are deficient of electrons as these elements like gp 13 elements do not have enough electrons. Examples are BH3 and AlH3 . . These compounds exist in polymeric form to make up for the deficiency of electrons. Example B2H6, B4H10 .

(ii) Electron- precise compounds of hydrogen :- The elements which form hydrides have exact number of electrons required for forming BOND. Example of such elements are C and Si.They form CH4 and SiH4.The electrons are Precise and hence they are CALLED as electron- precise compounds of hydrogen.

(iii) Electron-rich compounds of hydrogen :- Some elements like N, P S Cl ETC have more electrons than required for bonding. Some of their compounds are NH3, PH3, and HCl. Since there is a excess of electrons these hydrides are called electron-rich compounds of hydrogen.

keep LOVING.....❣️☺️

Discussion

39.	3. Calculate Ecell of given reaction?Mg(s) + 2 Ag+(0.0001M) → Mg+(0.130M) + 2 Ag(s)Given:- E mg^2+\| mg = -2.37V, E ag^+\| ag = +0.80V
Answer» ANSWER: - 4.15 APPROX EXPLANATION: HOPE the answer will HELP you

39.

3. Calculate Ecell of given reaction?Mg(s) + 2 Ag+(0.0001M) → Mg+(0.130M) + 2 Ag(s)Given:- E mg^2+| mg = -2.37V, E ag^+| ag = +0.80V

Answer»

ANSWER:

- 4.15 APPROX

EXPLANATION:

HOPE the answer will HELP you

Discussion

40.	Does corrosion occurs only in metals? In whst other types of substances corrosion occurs? No spam.....
Answer» Yes and No !!!! Explanation: "Corrosion" is just a result of DEGRADATION of metal LAYER and the TERM is SPECIFIC to metals only For materials such as Ceremics "Degradation" is the term . HOPE it helps Please Mark me the brainliest

40.

Does corrosion occurs only in metals? In whst other types of substances corrosion occurs? No spam.....

Answer»

Yes and No !!!!

Explanation:

"Corrosion" is just a result of DEGRADATION of metal LAYER and the TERM is SPECIFIC to metals only

For materials such as Ceremics "Degradation" is the term .

HOPE it helps

Please Mark me the brainliest

Discussion

41.	Guys please solve thae question
Answer» Answer: Explanation: 1) NUCLEONS is proton+neutron which is N=14 and O=16 now mole =molar mass/molecular WEIGHT and also to find out the no. of NUCLEON it will be N=(1/28)*14 =0.5 and for o=0.5 so it is true 2) it is true is fact 3) don't KNOW

41.

Guys please solve thae question

Answer»

Answer:

Explanation:

1) NUCLEONS is proton+neutron which is N=14 and O=16 now

mole =molar mass/molecular WEIGHT and also to find out the no. of NUCLEON it will be N=(1/28)*14 =0.5 and for o=0.5 so it is true

2) it is true is fact

3) don't KNOW

Discussion

42.	Plese tell me 10 properties of metal and non-metal for my practical exam .
Answer» METAL. 1 metal is luster. 2 metal is GOOD conductor of electricity. 3 metals have HIGH MELTING point. non metals are OPPO. to metal I hope understand you

42.

Plese tell me 10 properties of metal and non-metal for my practical exam .

Answer»

METAL.

1 metal is luster.

2 metal is GOOD conductor of electricity.

3 metals have HIGH MELTING point.

non metals are OPPO. to metal

I hope understand you

Discussion

43.	How to calculate the atoms of an element
Answer» ANSWER: SEARCH on google it is FASTEST,very easy way to get answer(always correct) plzzzzzzzzzzzzzzzz mark brainliest

43.

How to calculate the atoms of an element

Answer»

ANSWER:

SEARCH on google

it is FASTEST,very easy way to get answer(always correct)

plzzzzzzzzzzzzzzzz mark brainliest

Discussion

44.	Central metal ion?Pent a mine carbon a to chromium(\|\|\|)chloride
Answer» ANSWER: CHROMIUM is the CENTRAL metal ion. Explanation: hope the answer will HELP you

44.

Central metal ion?Pent a mine carbon a to chromium(|||)chloride

Answer»

ANSWER:

CHROMIUM is the CENTRAL metal ion.

Explanation:

hope the answer will HELP you

Discussion

45.	What about sugar and salt ? when kept in different jar these take the shape of the jar . Are they solid
Answer» Answer: YES they are solids Explanation: They don't CHANGE their SHAPE at the macroscopic level You can't easily with your hands change the shape of an INDIVIDUAL crystal of sugar or salt very easily. This easily disobeys one of the important properties of fluids that they easily change their shape hence sugar and salt are solids. Hope this answer helps

45.

What about sugar and salt ? when kept in different jar these take the shape of the jar . Are they solid

Answer»

Answer:

YES they are solids

Explanation:

They don't CHANGE their SHAPE at the macroscopic level

You can't easily with your hands change the shape of an INDIVIDUAL crystal of sugar or salt very easily.

This easily disobeys one of the important properties of fluids that they easily change their shape

hence sugar and salt are solids.

Hope this answer helps

Discussion

46.	Give two examples of the salt containing the water of crustallization which you do know
Answer» ANSWER: MgSO4.7H2o Explanation:

46.

Give two examples of the salt containing the water of crustallization which you do know

Answer»

ANSWER:

MgSO4.7H2o

Explanation:

Discussion

47.	What is exothermic reaction
Answer» REACTION in which heat is released along with the formation of products is called EXOTHERMIC reactions EXAMPLES: CH4+2O2 -------->CO2+2H2O hope this will help you please mark this ANSWER as briainlist and follow me

47.

What is exothermic reaction

Answer»

REACTION in which heat is released along with the formation of products is called EXOTHERMIC reactions

EXAMPLES: CH4+2O2 -------->CO2+2H2O

hope this will help you please mark this ANSWER as briainlist and follow me

Discussion

48.	Which of the following species cannot act as a Lewis base? O2–A)OH–B)C)CH4D)H2SE)NH3
Answer» Answer: O2 , CH4, H2S Explanation: all of THREE ELEMENT do not GIVE your electron to ACID

48.

Which of the following species cannot act as a Lewis base? O2–A)OH–B)C)CH4D)H2SE)NH3

Answer»

Answer:

O2 , CH4, H2S

Explanation:

all of THREE ELEMENT do not GIVE your electron to ACID

Discussion

49.	Which amongst the following is used for white washinga) CaO mixed with water, (b) CaCO3 mixed with water, (c) CaSO4 mixed with waterb) Ca(OH)2 mixed with water
Answer» ANSWER: CA(oh)2 *mixed* *with* *water......... foll*ow me ✌️

49.

Which amongst the following is used for white washinga) CaO mixed with water, (b) CaCO3 mixed with water, (c) CaSO4 mixed with waterb) Ca(OH)2 mixed with water

Answer»

ANSWER:

CA(oh)2 mixed with water.........

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Discussion

50.	Ethane cynaide to propanoic acid
Answer» ANSWER: Convert ethyl cyanide into propanoic acid by ADDING H+/OH- in presence of water, then react it with ammonia to MAKE propylamide. Use HOFFMAN Bromamide reaction to make it Ethyl amine. Now, react it with HNO2 to make ethanol, and then react it CrO3 with conc. H2SO4 to PRODUCE ethanoic acid

50.

Ethane cynaide to propanoic acid

Answer»

ANSWER:

Convert ethyl cyanide into propanoic acid by ADDING H+/OH- in presence of water, then react it with ammonia to MAKE propylamide. Use HOFFMAN Bromamide reaction to make it Ethyl amine. Now, react it with HNO2 to make ethanol, and then react it CrO3 with conc. H2SO4 to PRODUCE ethanoic acid

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