10223 + Interview Questions in Chemistry Page 91 InterviewSolution

4501.	What is covalent compound? How does carbon form covalent bond?
Answer» What is covalent compound? How does carbon form covalent bond?

Discussion

4502.	2.24 l co2 gas at ntp find mass
Answer» 2.24 l co2 gas at ntp find mass

Discussion

4503.	If ionic product of water is K_w=10^{-16 }at 4^° C,then a solution with pH=7.5 at 4^° C will
Answer» If ionic product of water is K_w=10^{-16 }at 4^° C,then a solution with pH=7.5 at 4^° C will

Discussion

4504.	One litreof water at 30°C is mixed with one litre of water at 50°C.The temperature of the mixture will be (a) 80°C (b) more than 50°C but less than80°C(c) 20°C (d) between30°C and 50°C
Answer» One litre of water at 30°C is mixed with one litre of water at 50°C. The temperature of the mixture will be (a) 80°C (b) more than 50°C but less than 80°C (c) 20°C (d) between 30°C and 50°C

4504.

One litreof water at 30°C is mixed with one litre of water at 50°C.The temperature of the mixture will be (a) 80°C (b) more than 50°C but less than80°C(c) 20°C (d) between30°C and 50°C

Answer»

One litre
of water at 30°C is mixed with one litre of water at 50°C.
The temperature of the mixture will be

(a) 80°C (b) more than 50°C but less than
80°C

(c) 20°C (d) between
30°C and 50°C

Discussion

4505.	What is anion displacement reaction
Answer» What is anion displacement reaction

Discussion

4506.	Name two gases which are supplied in compressed form in homes and hospitals.
Answer» Name two gases which are supplied in compressed form in homes and hospitals.

Discussion

4507.	An element possessing similar properties as cobalt and nickel was placed far away from these elements by Newlands. The element is___.
Answer» An element possessing similar properties as cobalt and nickel was placed far away from these elements by Newlands. The element is___.

Discussion

4508.	Which of the following is a displacement reaction?
Answer» Which of the following is a displacement reaction?

Discussion

4509.	Sulphur and oxygen are known to form two compounds.the sulphur content in one of these is 51%while in the other is 41%.show that this data is in agreement with the law of multiple proportion
Answer» Sulphur and oxygen are known to form two compounds.the sulphur content in one of these is 51%while in the other is 41%.show that this data is in agreement with the law of multiple proportion

Discussion

4510.	(a) What is the significance of a chemical formula?(b) Define polyatomic ions with an example?
Answer» (a) What is the significance of a chemical formula? (b) Define polyatomic ions with an example?

4510.

(a) What is the significance of a chemical formula?(b) Define polyatomic ions with an example?

Answer»

(a) What is the significance of a chemical formula?

(b) Define polyatomic ions with an example?

Discussion

4511.	For which of the following elements the sequence of increasing atomic masses was inverted in Mendeleev’s periodic table?
Answer» For which of the following elements the sequence of increasing atomic masses was inverted in Mendeleev’s periodic table?

Discussion

4512.	How atoms get converted into energy?
Answer» How atoms get converted into energy?

Discussion

4513.	Name one lead compound that can be used to oxidise hydrogen chloride to chlorine.
Answer» Name one lead compound that can be used to oxidise hydrogen chloride to chlorine.

Discussion

4514.	When do we do partial differentiation and gradient
Answer» When do we do partial differentiation and gradient

Discussion

4515.	O3 is formed by a double bond and a coordinate covalent bond.But the coordinate covalent bond is considered as a single covalent bond.So how does the 3rd O atom attain stability?
Answer» O3 is formed by a double bond and a coordinate covalent bond.But the coordinate covalent bond is considered as a single covalent bond.So how does the 3rd O atom attain stability?

Discussion

4516.	it is said that we can change a solid into liquid by increasing the temperature , and a liquid into solid by decreasing the temperature . Then , what will happen if we decrease the temperature of a solid
Answer» it is said that we can change a solid into liquid by increasing the temperature , and a liquid into solid by decreasing the temperature . Then , what will happen if we decrease the temperature of a solid

Discussion

4517.	Question 41(c) Compound X and aluminium are used to join railway tracks. Write down its reaction.
Answer» Question 41(c) Compound X and aluminium are used to join railway tracks. Write down its reaction.

Discussion

4518.	Why is the latent heat of fusion of ice i.e 3.34×105 J/kg less than the latent heat of vapourisation i.e 22.5×105 J/kg? Particles of solids are more tightly packed than liquids so literally the should require more energy for separation than liquids.
Answer» Why is the latent heat of fusion of ice i.e 3.34×10⁵J/kg less than the latent heat of vapourisation i.e 22.5×10⁵J/kg? Particles of solids are more tightly packed than liquids so literally the should require more energy for separation than liquids.

Discussion

4519.	If a solution contains 60 g of common salt in 340 g of water, the mass by mass percentage will be:
Answer» If a solution contains 60 g of common salt in 340 g of water, the mass by mass percentage will be:

Discussion

4520.	Identify the dispersed phase and dispersed medium in milk.
Answer» Identify the dispersed phase and dispersed medium in milk.

Discussion

4521.	What is true about the complex tetraammine zinc (II) ion ?
Answer» What is true about the complex tetraammine zinc (II) ion ?

Discussion

4522.	19. Give the organic product of the following reaction ClCH2CH2CH2I + KCN(1 Mole each) --------(acetone)-------> ICH2CH2CH2CN
Answer» 19. Give the organic product of the following reaction ClCH2CH2CH2I + KCN(1 Mole each) --------(acetone)-------> ICH2CH2CH2CN

Discussion

4523.	Give me any 10 Examples for the following reactions 1Chemical combination 2 Chemical composition 3 Chemical displacement 4 Chemical double displacement or exchange
Answer» Give me any 10 Examples for the following reactions 1Chemical combination 2 Chemical composition 3 Chemical displacement 4 Chemical double displacement or exchange

4523.

Give me any 10 Examples for the following reactions 1Chemical combination 2 Chemical composition 3 Chemical displacement 4 Chemical double displacement or exchange

Answer»

Give me any 10 Examples for the following reactions

1Chemical combination

2 Chemical composition

3 Chemical displacement

4 Chemical double displacement or exchange

Discussion

4524.	The correct order of atomic radii in group 13 elements is
Answer» The correct order of atomic radii in group 13 elements is

Discussion

4525.	Which one of following carboxylic acid is most acidic(1)O-Methyl benzoic acid (2)m-methyl benzoic acid (3)p-methyl benzoic acid (4)benzoic acid
Answer» Which one of following carboxylic acid is most acidic (1)O-Methyl benzoic acid (2)m-methyl benzoic acid (3)p-methyl benzoic acid (4)benzoic acid

Discussion

4526.	The subatomic particle not present in a hydrogen atom is....................
Answer» The subatomic particle not present in a hydrogen atom is....................

Discussion

4527.	34. In diborane, the incorrect statement is: A) All 6 B--H bond are in the same plane B) 4 B--H bonds are on the same plane and two B--H bonds above and below the plane C) It is the 12 electron species D) Two BH3 are attached with three center electron pair bond
Answer» 34. In diborane, the incorrect statement is: A) All 6 B--H bond are in the same plane B) 4 B--H bonds are on the same plane and two B--H bonds above and below the plane C) It is the 12 electron species D) Two BH3 are attached with three center electron pair bond

Discussion

4528.	AT CONSTANT TEMPERATURE, THE GAS IS AT A PRESSURE OF 940mm OF Hg. AT WHAT PRESSURE, IT'S VOLUME DECREASES BY 40%?
Answer» AT CONSTANT TEMPERATURE, THE GAS IS AT A PRESSURE OF 940mm OF Hg. AT WHAT PRESSURE, IT'S VOLUME DECREASES BY 40%?

Discussion

4529.	Anode rays and Cathode rays are originated from ?
Answer» Anode rays and Cathode rays are originated from ?

Discussion

4530.	How can we separate a mixture of salt and ammonium chloride?
Answer» How can we separate a mixture of salt and ammonium chloride?

Discussion

4531.	WHAT IS DEGREE OF DISSOCIATION?
Answer» WHAT IS DEGREE OF DISSOCIATION?

Discussion

4532.	The scientists now say that there are actually five states of matter A, B, C, D and E. The state A has a fixed volume but no fixed shape. The sate B can be compressed very easily by applying pressure and state C has a fixed shape as well as a fixed volume. The state D is a mixture of free electrons and ions whereas state E is named after an Indian scientist and a famous Physicist. (a) Name the physical states (i) A (ii) B (iii) C (iv) D and (v) E. (b) Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as? (c) Name one substance which normally belongs to state B but whose solid form changes directly into a gaseous state. (d) Name the most common substance belonging to state A. (e) Which state of matter makes the sun and other stars to glow?
Answer» The scientists now say that there are actually five states of matter A, B, C, D and E. The state A has a fixed volume but no fixed shape. The sate B can be compressed very easily by applying pressure and state C has a fixed shape as well as a fixed volume. The state D is a mixture of free electrons and ions whereas state E is named after an Indian scientist and a famous Physicist. (a) Name the physical states (i) A (ii) B (iii) C (iv) D and (v) E. (b) Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as? (c) Name one substance which normally belongs to state B but whose solid form changes directly into a gaseous state. (d) Name the most common substance belonging to state A. (e) Which state of matter makes the sun and other stars to glow?

4532.

The scientists now say that there are actually five states of matter A, B, C, D and E. The state A has a fixed volume but no fixed shape. The sate B can be compressed very easily by applying pressure and state C has a fixed shape as well as a fixed volume. The state D is a mixture of free electrons and ions whereas state E is named after an Indian scientist and a famous Physicist. (a) Name the physical states (i) A (ii) B (iii) C (iv) D and (v) E. (b) Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as? (c) Name one substance which normally belongs to state B but whose solid form changes directly into a gaseous state. (d) Name the most common substance belonging to state A. (e) Which state of matter makes the sun and other stars to glow?

Answer»

The scientists now say that there are actually five states of matter A, B, C, D and E. The state A has a fixed volume but no fixed shape. The sate B can be compressed very easily by applying pressure and state C has a fixed shape as well as a fixed volume. The state D is a mixture of free electrons and ions whereas state E is named after an Indian scientist and a famous Physicist.

(a) Name the physical states (i) A (ii) B (iii) C (iv) D and (v) E.

(b) Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as?

(c) Name one substance which normally belongs to state B but whose solid form changes directly into a gaseous state.

(d) Name the most common substance belonging to state A.

(e) Which state of matter makes the sun and other stars to glow?

Discussion

4533.	CONVERT KELVIN INTO CELSIUS : A. 300K B.573K
Answer» CONVERT KELVIN INTO CELSIUS : A. 300K B.573K

4533.

CONVERT KELVIN INTO CELSIUS : A. 300K B.573K

Answer»

CONVERT KELVIN INTO CELSIUS :

A. 300K

B.573K

Discussion

4534.	68.A closed container has 2 non-reactive gases neon and oxygen with tgeir partial pressure ratio 3:2 . If the atomic mass of Ne = 20.2 u and molecular mass of O2 is 32u then find the ratio of their mass density.
Answer» 68.A closed container has 2 non-reactive gases neon and oxygen with tgeir partial pressure ratio 3:2 . If the atomic mass of Ne = 20.2 u and molecular mass of O2 is 32u then find the ratio of their mass density.

Discussion

4535.	All the gases form cathode rays and anode when electricity is passed through them:(i) What does the formation of cathode rays tell us about the atoms?(ii) What does the formation of anode rays tell us about the atoms?
Answer» All the gases form cathode rays and anode when electricity is passed through them: (i) What does the formation of cathode rays tell us about the atoms? (ii) What does the formation of anode rays tell us about the atoms?

Discussion

4536.	Why ionic compounds are not responsible for geometry
Answer» Why ionic compounds are not responsible for geometry

Discussion

4537.	KI in acetone undergoes Sn2 reaction with each of P ,Q ,R and S The rates of reaction vary as
Answer» KI in acetone undergoes Sn2 reaction with each of P ,Q ,R and S The rates of reaction vary as

Discussion

4538.	A block slides on a smooth inclined plane starting from rest. if Sn is the distance travelled in nth second, then Sn/Sn+1 is ;
Answer» A block slides on a smooth inclined plane starting from rest. if Sn is the distance travelled in nth second, then Sn/Sn+1 is ;

Discussion

4539.	Arrange in increasing order of electron gain enthalpy of the 2 nd period elements.
Answer» Arrange in increasing order of electron gain enthalpy of the 2 nd period elements.

Discussion

4540.	Give the assumptions of the kinetic molecular theory.
Answer» Give the assumptions of the kinetic molecular theory.

Discussion

4541.	Find the chemical formula of carbon tetrachloride. [3 MARKS]
Answer» Find the chemical formula of carbon tetrachloride. [3 MARKS]

Discussion

4542.	Question 6(a)Calculate the molar mass of the following substances:(a) Ethyne, C2H2
Answer» Question 6(a) Calculate the molar mass of the following substances: $(a) E t h y n e, C_{2} H_{2}$

Discussion

4543.	43.Solid ammonium carbamate dissociated into 2 moles of ammonia and 1 mole carbon dioxide. Total pressure of gases in equilibrium is 5 atm. Hence K_p will be?
Answer» 43.Solid ammonium carbamate dissociated into 2 moles of ammonia and 1 mole carbon dioxide. Total pressure of gases in equilibrium is 5 atm. Hence K_p will be?

Discussion

4544.	(a) State the law of conservation of mass. (b) What do you observe when barium chloride solution is mixed with sodium sulphate solution ?
Answer» (a) State the law of conservation of mass. (b) What do you observe when barium chloride solution is mixed with sodium sulphate solution ?

4544.

(a) State the law of conservation of mass. (b) What do you observe when barium chloride solution is mixed with sodium sulphate solution ?

Answer»

(a) State the law of conservation of mass.

(b) What do you observe when barium chloride solution is mixed with sodium sulphate solution ?

Discussion

4545.	Which of the following gas is formed when copper reacts with a hot dilute nitric acid?
Answer» Which of the following gas is formed when copper reacts with a hot dilute nitric acid?

Discussion

4546.	4.095 X 10 nitrogen atoms are filled in an enclosed gas cylinder of capacity 2 litre. The number ofmoles of nitrogen gas in the cylinder is?
Answer» 4.095 X 10 nitrogen atoms are filled in an enclosed gas cylinder of capacity 2 litre. The number ofmoles of nitrogen gas in the cylinder is?

Discussion

4547.	Draw neat and well labelled diagram of Rutherford’s scattering experiment.
Answer» Draw neat and well labelled diagram of Rutherford’s scattering experiment.

Discussion

4548.

Given below is the dictionary meaning ofSmirk: to smile in a silly or unpleasant way that shows that you are pleased with yourself.Look up the dictionary for the following words which are also related to facial expressions and write down the meaning of eachsmilegringrimacesneer

Answer»

Given below is the dictionary meaning of

Smirk: to smile in a silly or unpleasant way that shows that you are pleased with yourself.

Look up the dictionary for the following words which are also related to facial expressions and write down the meaning of each

smile

grin

grimace

sneer

Discussion

4549.	Why we should wear cotton clothes in summer and atomic mass
Answer» Why we should wear cotton clothes in summer and atomic mass

Discussion

4550.	For the reaction, N2O3 to NO+NO2,the value of equilibrium constant Kp at a fixed temperature is 4. What will be the amount of dissociation at the same temperature and 5atm?
Answer» For the reaction, N₂O₃ to NO+NO₂,the value of equilibrium constant Kp at a fixed temperature is 4. What will be the amount of dissociation at the same temperature and 5atm?

Discussion

Explore topic-wise InterviewSolutions in .

What is covalent compound? How does carbon form covalent bond?

2.24 l co2 gas at ntp find mass

If ionic product of water is K_w=10^{-16 }at 4^° C,then a solution with pH=7.5 at 4^° C will

One litreof water at 30°C is mixed with one litre of water at 50°C.The temperature of the mixture will be (a) 80°C (b) more than 50°C but less than80°C(c) 20°C (d) between30°C and 50°C

What is anion displacement reaction

Name two gases which are supplied in compressed form in homes and hospitals.

An element possessing similar properties as cobalt and nickel was placed far away from these elements by Newlands. The element is___.

Which of the following is a displacement reaction?

Sulphur and oxygen are known to form two compounds.the sulphur content in one of these is 51%while in the other is 41%.show that this data is in agreement with the law of multiple proportion

(a) What is the significance of a chemical formula?(b) Define polyatomic ions with an example?

For which of the following elements the sequence of increasing atomic masses was inverted in Mendeleev’s periodic table?

How atoms get converted into energy?

Name one lead compound that can be used to oxidise hydrogen chloride to chlorine.

When do we do partial differentiation and gradient

O3 is formed by a double bond and a coordinate covalent bond.But the coordinate covalent bond is considered as a single covalent bond.So how does the 3rd O atom attain stability?

it is said that we can change a solid into liquid by increasing the temperature , and a liquid into solid by decreasing the temperature . Then , what will happen if we decrease the temperature of a solid

Question 41(c) Compound X and aluminium are used to join railway tracks. Write down its reaction.

Why is the latent heat of fusion of ice i.e 3.34×105 J/kg less than the latent heat of vapourisation i.e 22.5×105 ​​​​​​J/kg? Particles of solids are more tightly packed than liquids so literally the should require more energy for separation than liquids.

If a solution contains 60 g of common salt in 340 g of water, the mass by mass percentage will be:

Identify the dispersed phase and dispersed medium in milk.

What is true about the complex tetraammine zinc (II) ion ?

19. Give the organic product of the following reaction ClCH2CH2CH2I + KCN(1 Mole each) --------(acetone)-------> ICH2CH2CH2CN

Give me any 10 Examples for the following reactions 1Chemical combination 2 Chemical composition 3 Chemical displacement 4 Chemical double displacement or exchange

The correct order of atomic radii in group 13 elements is

Which one of following carboxylic acid is most acidic(1)O-Methyl benzoic acid (2)m-methyl benzoic acid (3)p-methyl benzoic acid (4)benzoic acid

The subatomic particle not present in a hydrogen atom is....................

34. In diborane, the incorrect statement is: A) All 6 B--H bond are in the same plane B) 4 B--H bonds are on the same plane and two B--H bonds above and below the plane C) It is the 12 electron species D) Two BH3 are attached with three center electron pair bond

AT CONSTANT TEMPERATURE, THE GAS IS AT A PRESSURE OF 940mm OF Hg. AT WHAT PRESSURE, IT'S VOLUME DECREASES BY 40%?

Anode rays and Cathode rays are originated from ?

How can we separate a mixture of salt and ammonium chloride?

WHAT IS DEGREE OF DISSOCIATION?

CONVERT KELVIN INTO CELSIUS : A. 300K B.573K

68.A closed container has 2 non-reactive gases neon and oxygen with tgeir partial pressure ratio 3:2 . If the atomic mass of Ne = 20.2 u and molecular mass of O2 is 32u then find the ratio of their mass density.

All the gases form cathode rays and anode when electricity is passed through them:(i) What does the formation of cathode rays tell us about the atoms?(ii) What does the formation of anode rays tell us about the atoms?

Why ionic compounds are not responsible for geometry

KI in acetone undergoes Sn2 reaction with each of P ,Q ,R and S The rates of reaction vary as

A block slides on a smooth inclined plane starting from rest. if Sn is the distance travelled in nth second, then Sn/Sn+1 is ;

Arrange in increasing order of electron gain enthalpy of the 2 nd period elements.

Give the assumptions of the kinetic molecular theory.

Find the chemical formula of carbon tetrachloride. [3 MARKS]

Question 6(a)Calculate the molar mass of the following substances:(a) Ethyne, C2H2

43.Solid ammonium carbamate dissociated into 2 moles of ammonia and 1 mole carbon dioxide. Total pressure of gases in equilibrium is 5 atm. Hence K_p will be?

(a) State the law of conservation of mass. (b) What do you observe when barium chloride solution is mixed with sodium sulphate solution ?

Which of the following gas is formed when copper reacts with a hot dilute nitric acid?

4.095 X 10 nitrogen atoms are filled in an enclosed gas cylinder of capacity 2 litre. The number ofmoles of nitrogen gas in the cylinder is?

Draw neat and well labelled diagram of Rutherford’s scattering experiment.

Given below is the dictionary meaning ofSmirk: to smile in a silly or unpleasant way that shows that you are pleased with yourself.Look up the dictionary for the following words which are also related to facial expressions and write down the meaning of eachsmilegringrimacesneer

Why we should wear cotton clothes in summer and atomic mass

For the reaction, N2O3 to NO+NO2,the value of equilibrium constant Kp at a fixed temperature is 4. What will be the amount of dissociation at the same temperature and 5atm?

Why is the latent heat of fusion of ice i.e 3.34×105 J/kg less than the latent heat of vapourisation i.e 22.5×105 J/kg? Particles of solids are more tightly packed than liquids so literally the should require more energy for separation than liquids.