7248 + Interview Questions in Chemistry Page 85 InterviewSolution

4201.	260. Aration of the plates isdoubled and the interspace between the plates is filled with wax. If the capacity is increasedn air filled parallel plate condenser has a capacity of 2 pF. The sepato 6 pF, the dielectric constant of wax is
Answer» 260. Aration of the plates isdoubled and the interspace between the plates is filled with wax. If the capacity is increasedn air filled parallel plate condenser has a capacity of 2 pF. The sepato 6 pF, the dielectric constant of wax is

Discussion

4202.	Explain physical state and hardness of metals.
Answer» Explain physical state and hardness of metals.

Discussion

4203.	Question 9Give a reason for the following statement – Sewage should not be disposed of in rivers or oceans before treatment.
Answer» Question 9 Give a reason for the following statement – Sewage should not be disposed of in rivers or oceans before treatment.

4203.

Question 9Give a reason for the following statement – Sewage should not be disposed of in rivers or oceans before treatment.

Answer»

Question 9

Give a reason for the following statement – Sewage should not be disposed of in rivers or oceans before treatment.

Discussion

4204.	Corrosion of iron can be prevented by :-
Answer» Corrosion of iron can be prevented by :-

Discussion

4205.	How will you separate a mixture containing kerosene and petrol, which are miscible with each other?
Answer» How will you separate a mixture containing kerosene and petrol, which are miscible with each other?

Discussion

4206.	Why do Sodium and Potassium need to be kept in kerosene? Define noble metals? Give examples.
Answer» Why do Sodium and Potassium need to be kept in kerosene? Define noble metals? Give examples.

Discussion

4207.	40. At a given temperature , total vapour pressure in a torr of a mixture of volatile components A and B is given by P(total) =120 – 75 X(B) Hence, vapour pressure of pure A and B respectively ( in torr) are
Answer» 40. At a given temperature , total vapour pressure in a torr of a mixture of volatile components A and B is given by P(total) =120 – 75 X(B) Hence, vapour pressure of pure A and B respectively ( in torr) are

Discussion

4208.	List any five important uses of metals. [5 MARKS]
Answer» List any five important uses of metals. [5 MARKS]

Discussion

4209.	Which of the following options has a pair of exhaustible natural resources?
Answer» Which of the following options has a pair of exhaustible natural resources?

Discussion

4210.	A ball of uniform density 2/3 that of water is dropped freely into a pond from a height of 10m above the surface. The maximum depth the ball can travel in water is
Answer» A ball of uniform density 2/3 that of water is dropped freely into a pond from a height of 10m above the surface. The maximum depth the ball can travel in water is

Discussion

4211.	Which of the following can remove all types of hardness of water?(1) Soap(2) Washing soda(3) Ca(OH)2(4) None
Answer» Which of the following can remove all types of hardness of water?(1) Soap(2) Washing soda(3) Ca(OH)2(4) None

Discussion

4212.	Why the evaporation rate is faster in the hill station
Answer» Why the evaporation rate is faster in the hill station

Discussion

4213.	How to calculate formula unit
Answer» How to calculate formula unit

Discussion

4214.	Question 6 On placing an inverted tumbler over a burning candle, the flame extinguishes after some time. This is because of non availability of (a) Oxygen (b) Water vapours (c) Carbon dioxide (d) Was covered with tumbler
Answer» Question 6 On placing an inverted tumbler over a burning candle, the flame extinguishes after some time. This is because of non availability of (a) Oxygen (b) Water vapours (c) Carbon dioxide (d) Was covered with tumbler

Discussion

4215.	Question 5Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?(a) iron(b) sodium(c) gold(d) magnesium
Answer» Question 5 Metals are generally hard. Which of the following metals is an exception and can be cut with a knife? (a) iron (b) sodium (c) gold (d) magnesium

Discussion

4216.	In a hydroelectric power plant, moving water is used for driving the wheels of a turbine to generate electricity. If the change in kinetic energy of turbine is 1200 J in 2 minutes then the power generated is:
Answer» In a hydroelectric power plant, moving water is used for driving the wheels of a turbine to generate electricity. If the change in kinetic energy of turbine is 1200 J in 2 minutes then the power generated is:

Discussion

4217.	the difference between enthalpy change at cons†an t pressure and internal energy change at cons†an t volume for the combustion of carbon monoxide at 300 K is a.0.3kcal b. 0.58kcal c. 0.42 kcal d. 0.74 kcal
Answer» the difference between enthalpy change at cons†an t pressure and internal energy change at cons†an t volume for the combustion of carbon monoxide at 300 K is a.0.3kcal b. 0.58kcal c. 0.42 kcal d. 0.74 kcal

Discussion

4218.

Which of the following statements regarding thermoplastics and thermosetting plastics is/are true? ThermoplasticsThermosetting plasticsASoftHardBAble to withstand heatCannot withstand heatCNo cross-linkagesCross-linkage present

Answer»

Which of the following statements regarding thermoplastics and thermosetting plastics is/are true?

	Thermoplastics	Thermosetting plastics
A	Soft	Hard
B	Able to withstand heat	Cannot withstand heat
C	No cross-linkages	Cross-linkage present

Discussion

4219.	Can solids diffuse.Why or why not?
Answer» Can solids diffuse.Why or why not?

Discussion

4220.	65 What is the mechanism for the reaction of Oxidation of aldehydes by Selenium dioxide?
Answer» 65 What is the mechanism for the reaction of Oxidation of aldehydes by Selenium dioxide?

Discussion

4221.	Categorise the following materials as metals and non-metals:Silver, sulphur, copper, carbon, and phosphorous.
Answer» Categorise the following materials as metals and non-metals: Silver, sulphur, copper, carbon, and phosphorous.

Discussion

4222.	Question 4How the terms sewers and sewerage are linked with each other?
Answer» Question 4 How the terms sewers and sewerage are linked with each other?

4222.

Question 4How the terms sewers and sewerage are linked with each other?

Answer»

Question 4

How the terms sewers and sewerage are linked with each other?

Discussion

4223.

Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties. Properties Metals Non-metals 1. Appearance 2. Hardness 3. Malleability 4. Ductility 5. Heat Conduction 6. Conduction of Electricity

Answer» Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties.

Properties	Metals	Non-metals
1. Appearance
2. Hardness
3. Malleability
4. Ductility
5. Heat Conduction
6. Conduction of Electricity

Discussion

4224.	Which of the following substance is generally used as a fuel?
Answer» Which of the following substance is generally used as a fuel?

Discussion

4225.	Which among the following does not undergo sublimation?
Answer» Which among the following does not undergo sublimation?

Discussion

4226.	Distance (x) travelled by a particle depends on time t as x = αt + β. The dimensions of (α/β) is?
Answer» Distance (x) travelled by a particle depends on time t as x = αt + β. The dimensions of (α/β) is?

Discussion

4227.	If weight of hydrogen in a sample of NH3 is 30g. Find the weight of sample
Answer» If weight of hydrogen in a sample of NH3 is 30g. Find the weight of sample

Discussion

4228.	Which of the following metal doesn't react even with steam?
Answer» Which of the following metal doesn't react even with steam?

4228.

Which of the following metal doesn't react even with steam?

Answer»

Which of the following metal doesn't react even with steam?

Discussion

4229.	The component present in greater proportion in water gas is
Answer» The component present in greater proportion in water gas is

Discussion

4230.	What are the properties of suspension?
Answer» What are the properties of suspension?

Discussion

4231.	Is fire living?
Answer» Is fire living?

Discussion

4232.	Oil is forced out of the earth's crust by
Answer» Oil is forced out of the earth's crust by

Discussion

4233.	16 At 1.23atm &727^° C total equilibrium pressure partially dissociate in SO3,SO2 and O2 SO3(g) >SO2(g)+1/2O2(g) If the density of equilibrium mixture is 0.9gm/lit so what is the dissociation value 1)1/3 2)2/3 3)1/4 4)1/5
Answer» 16 At 1.23atm &727^° C total equilibrium pressure partially dissociate in SO3,SO2 and O2 SO3(g) >SO2(g)+1/2O2(g) If the density of equilibrium mixture is 0.9gm/lit so what is the dissociation value 1)1/3 2)2/3 3)1/4 4)1/5

Discussion

4234.	Why solids have least Potential Energy?
Answer» Why solids have least Potential Energy?

Discussion

4235.	What is the most basic definition of enthalpy?
Answer» What is the most basic definition of enthalpy?

Discussion

4236.	It is possible for a substance to coexist in all three phases in equilibrium, when the substance is at
Answer» It is possible for a substance to coexist in all three phases in equilibrium, when the substance is at

4236.

It is possible for a substance to coexist in all three phases in equilibrium, when the substance is at

Answer»

It is possible for a substance to coexist in all three phases in equilibrium, when the substance is at

Discussion

4237.	(1)In the boxes of Column I the letters of some words got jumbled.Arrange them in proper form in the boxes given in Column II.(2)In the boxes of Column I the letters of some words got jumbled.Arrange them in proper form in the boxes given in Column II.(3)In the boxes of Column I the letters of some words got jumbled.Arrange them in proper form in the boxes given in Column II.(4)In the boxes of Column I the letters of some words got jumbled.Arrange them in proper form in the boxes given in Column II.
Answer» (1) In the boxes of Column I the letters of some words got jumbled. Arrange them in proper form in the boxes given in Column II. (2) In the boxes of Column I the letters of some words got jumbled. Arrange them in proper form in the boxes given in Column II. (3) In the boxes of Column I the letters of some words got jumbled. Arrange them in proper form in the boxes given in Column II. (4) In the boxes of Column I the letters of some words got jumbled. Arrange them in proper form in the boxes given in Column II.

4237.

(1)In the boxes of Column I the letters of some words got jumbled.Arrange them in proper form in the boxes given in Column II.(2)In the boxes of Column I the letters of some words got jumbled.Arrange them in proper form in the boxes given in Column II.(3)In the boxes of Column I the letters of some words got jumbled.Arrange them in proper form in the boxes given in Column II.(4)In the boxes of Column I the letters of some words got jumbled.Arrange them in proper form in the boxes given in Column II.

Answer» (1)

In the boxes of Column I the letters of some words got jumbled.

Arrange them in proper form in the boxes given in Column II.

(2)

In the boxes of Column I the letters of some words got jumbled.

Arrange them in proper form in the boxes given in Column II.

(3)

In the boxes of Column I the letters of some words got jumbled.

Arrange them in proper form in the boxes given in Column II.

(4)

In the boxes of Column I the letters of some words got jumbled.

Arrange them in proper form in the boxes given in Column II.

Discussion

4238.	Name the following: (a) A lustrous liquid metal.(b) A liquid non-metal(c) A metal which can be cut with a knife(d) A non-metal which is good conductor of electricity.
Answer» Name the following: (a) A lustrous liquid metal. (b) A liquid non-metal (c) A metal which can be cut with a knife (d) A non-metal which is good conductor of electricity.

Discussion

4239.	Which among the following is a light metal that pollutes water?
Answer» Which among the following is a light metal that pollutes water?

Discussion

4240.	Every substance has to be heated to a minimum temperature in order for the combustion process to start, this temperature is known as __ temperature.
Answer» Every substance has to be heated to a minimum temperature in order for the combustion process to start, this temperature is known as __ temperature.

Discussion

4241.	ammonium perchlorate nh4clo4 used in the fuel in the booster rockets on the space shuttle is prepeared from sodium perchlorate which is produced commercially by the electrolysis of hot stirred solution of sodium chloride .how many faradays are required to produce 1 kg of sodium perchlorate ?
Answer» ammonium perchlorate nh4clo4 used in the fuel in the booster rockets on the space shuttle is prepeared from sodium perchlorate which is produced commercially by the electrolysis of hot stirred solution of sodium chloride .how many faradays are required to produce 1 kg of sodium perchlorate ?

Discussion

4242.	Q. If magnesium react with chlorine then mg donate 2 electrons to cl but cl accept only 1 electron then what does happen with the other unaccepted electron?
Answer» Q. If magnesium react with chlorine then mg donate 2 electrons to cl but cl accept only 1 electron then what does happen with the other unaccepted electron?

Discussion

4243.	The name hydrogen is derived from ___.
Answer» The name hydrogen is derived from ___.

Discussion

4244.	Explain the following sentence. "Saving energy is the need of the hour."
Answer» Explain the following sentence. "Saving energy is the need of the hour."

Discussion

4245.	Correct order of 3rd ionization energy of B, C, N and O will be. Explain
Answer» Correct order of 3rd ionization energy of B, C, N and O will be. Explain

Discussion

4246.	A solution is said to be ___ if no more solute can be dissolved in it.
Answer» A solution is said to be ___ if no more solute can be dissolved in it.

Discussion

4247.	The energy of activation of a first order reaction is 187.06 kJ mol−1 at 750 K and the value of pre-exponential factor A is 1.97×1012s−1. Calculate the half life. (e−30=9.35×10−14)
Answer» The energy of activation of a first order reaction is $187.06 k J m o l^{- 1}$ at 750 K and the value of pre-exponential factor A is $1.97 \times 10^{12} s^{- 1}$ . Calculate the half life. $(e^{- 30} = 9.35 \times 10^{- 14})$

Discussion

4248.	In hydrated salt, why the salt does not wet by the action of water?
Answer» In hydrated salt, why the salt does not wet by the action of water?

Discussion

4249.	Write few uses of Bakelite and Melamine.
Answer» Write few uses of Bakelite and Melamine.

Discussion

4250.	CAN CONSTITUENTS OF A HOMOGENEOUS MIXTURE BE SEPARATED BY ANY PROCESS.IF YES THEN WHY MILK IS A HETERGENOUS MIXTURE
Answer» CAN CONSTITUENTS OF A HOMOGENEOUS MIXTURE BE SEPARATED BY ANY PROCESS. IF YES THEN WHY MILK IS A HETERGENOUS MIXTURE

Discussion

Explore topic-wise InterviewSolutions in .

260. Aration of the plates isdoubled and the interspace between the plates is filled with wax. If the capacity is increasedn air filled parallel plate condenser has a capacity of 2 pF. The sepato 6 pF, the dielectric constant of wax is

Explain physical state and hardness of metals.

Question 9Give a reason for the following statement – Sewage should not be disposed of in rivers or oceans before treatment.

Corrosion of iron can be prevented by :-

How will you separate a mixture containing kerosene and petrol, which are miscible with each other?

Why do Sodium and Potassium need to be kept in kerosene? Define noble metals? Give examples.

40. At a given temperature , total vapour pressure in a torr of a mixture of volatile components A and B is given by P(total) =120 – 75 X(B) Hence, vapour pressure of pure A and B respectively ( in torr) are

List any five important uses of metals. [5 MARKS]

Which of the following options has a pair of exhaustible natural resources?

A ball of uniform density 2/3 that of water is dropped freely into a pond from a height of 10m above the surface. The maximum depth the ball can travel in water is

Which of the following can remove all types of hardness of water?(1) Soap(2) Washing soda(3) Ca(OH)2(4) None

Why the evaporation rate is faster in the hill station

How to calculate formula unit

Question 6 On placing an inverted tumbler over a burning candle, the flame extinguishes after some time. This is because of non availability of (a) Oxygen (b) Water vapours (c) Carbon dioxide (d) Was covered with tumbler

Question 5Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?(a) iron(b) sodium(c) gold(d) magnesium

In a hydroelectric power plant, moving water is used for driving the wheels of a turbine to generate electricity. If the change in kinetic energy of turbine is 1200 J in 2 minutes then the power generated is:

the difference between enthalpy change at cons†an t pressure and internal energy change at cons†an t volume for the combustion of carbon monoxide at 300 K is a.0.3kcal b. 0.58kcal c. 0.42 kcal d. 0.74 kcal

Which of the following statements regarding thermoplastics and thermosetting plastics is/are true? ThermoplasticsThermosetting plasticsASoftHardBAble to withstand heatCannot withstand heatCNo cross-linkagesCross-linkage present

Can solids diffuse.Why or why not?

65 What is the mechanism for the reaction of Oxidation of aldehydes by Selenium dioxide?

Categorise the following materials as metals and non-metals:Silver, sulphur, copper, carbon, and phosphorous.

Question 4How the terms sewers and sewerage are linked with each other?

Which of the following substance is generally used as a fuel?

Which among the following does not undergo sublimation?

Distance (x) travelled by a particle depends on time t as x = αt + β. The dimensions of (α/β) is?

If weight of hydrogen in a sample of NH3 is 30g. Find the weight of sample

Which of the following metal doesn't react even with steam?

The component present in greater proportion in water gas is

What are the properties of suspension?

Is fire living?

Oil is forced out of the earth's crust by

16 At 1.23atm &727^° C total equilibrium pressure partially dissociate in SO3,SO2 and O2 SO3(g) >SO2(g)+1/2O2(g) If the density of equilibrium mixture is 0.9gm/lit so what is the dissociation value 1)1/3 2)2/3 3)1/4 4)1/5

Why solids have least Potential Energy?

What is the most basic definition of enthalpy?

It is possible for a substance to coexist in all three phases in equilibrium, when the substance is at

Name the following: (a) A lustrous liquid metal.(b) A liquid non-metal(c) A metal which can be cut with a knife(d) A non-metal which is good conductor of electricity.

Which among the following is a light metal that pollutes water?

Every substance has to be heated to a minimum temperature in order for the combustion process to start, this temperature is known as __ temperature.

ammonium perchlorate nh4clo4 used in the fuel in the booster rockets on the space shuttle is prepeared from sodium perchlorate which is produced commercially by the electrolysis of hot stirred solution of sodium chloride .how many faradays are required to produce 1 kg of sodium perchlorate ?

Q. If magnesium react with chlorine then mg donate 2 electrons to cl but cl accept only 1 electron then what does happen with the other unaccepted electron?

The name hydrogen is derived from ___.

Explain the following sentence. "Saving energy is the need of the hour."

Correct order of 3rd ionization energy of B, C, N and O will be. Explain

A solution is said to be ___ if no more solute can be dissolved in it.

The energy of activation of a first order reaction is 187.06 kJ mol−1 at 750 K and the value of pre-exponential factor A is 1.97×1012s−1. Calculate the half life. (e−30=9.35×10−14)

In hydrated salt, why the salt does not wet by the action of water?

Write few uses of Bakelite and Melamine.

CAN CONSTITUENTS OF A HOMOGENEOUS MIXTURE BE SEPARATED BY ANY PROCESS.IF YES THEN WHY MILK IS A HETERGENOUS MIXTURE