7248 + Interview Questions in Chemistry Page 101 InterviewSolution

5001.	Which catalyst is used in bosch process when water gas is mixed with excess steam?
Answer» Which catalyst is used in bosch process when water gas is mixed with excess steam?

Discussion

5002.	I am a microbe which lives in polluted water. During the rainy season I make many people fall ill. I cause a disease known as typhoid. Who am I?
Answer» I am a microbe which lives in polluted water. During the rainy season I make many people fall ill. I cause a disease known as typhoid. Who am I?

Discussion

5003.	Which of the following is not correct?
Answer» Which of the following is not correct?

Discussion

5004.	An energy level has a fixed number of electrons. But when electrons jump from ground state to their excited state...the number of electrons in the excited state should increase and in the ground state should decrease.... So the formula of 2n^2 would not work! !!
Answer» An energy level has a fixed number of electrons. But when electrons jump from ground state to their excited state...the number of electrons in the excited state should increase and in the ground state should decrease.... So the formula of 2n^2 would not work! !!

Discussion

5005.	Give two examples each. A.liquid element. B. Gaseous element. C.solid element. D. Homogeneous mixture. E. Colloid. F. Organic compound. G. Complex compound. H. Inorganic compound. I.metalloid. J. Element with valency 1. K. Element with valency 2
Answer» Give two examples each. A.liquid element. B. Gaseous element. C.solid element. D. Homogeneous mixture. E. Colloid. F. Organic compound. G. Complex compound. H. Inorganic compound. I.metalloid. J. Element with valency 1. K. Element with valency 2

5005.

Give two examples each. A.liquid element. B. Gaseous element. C.solid element. D. Homogeneous mixture. E. Colloid. F. Organic compound. G. Complex compound. H. Inorganic compound. I.metalloid. J. Element with valency 1. K. Element with valency 2

Answer»

Give two examples each.

A.liquid element.

B. Gaseous element.

C.solid element.

D. Homogeneous mixture.

E. Colloid.

F. Organic compound.

G. Complex compound.

H. Inorganic compound.

I.metalloid.

J. Element with valency 1.

K. Element with valency 2

Discussion

5006.	Which inert gas is used in the advertisement hoarding shown in the given picture?
Answer» Which inert gas is used in the advertisement hoarding shown in the given picture?

5006.

Which inert gas is used in the advertisement hoarding shown in the given picture?

Answer»

Which inert gas is used in the advertisement hoarding shown in the given picture?

Discussion

5007.	(a) Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 298 K are 200 mm Hg and 415 mm Hg respectively. Calculate the vapour pressure of the solution prepared by mixing 25.5 g of CHCl3 and 40 g of CH2Cl2 at 298 K (b) State Raoult’s law (c) What is meant by azeotropicmixture?
Answer» (a) Vapour pressure of chloroform $(C H C l_{3})$ and dichloromethane $(C H_{2} C l_{2})$ at 298 K are 200 mm Hg and 415 mm Hg respectively. Calculate the vapour pressure of the solution prepared by mixing 25.5 g of CHCl3 and 40 g of $C H_{2} C l_{2} a t 298 K$ (b) State Raoult’s law (c) What is meant by azeotropicmixture?

5007.

(a) Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 298 K are 200 mm Hg and 415 mm Hg respectively. Calculate the vapour pressure of the solution prepared by mixing 25.5 g of CHCl3 and 40 g of CH2Cl2 at 298 K (b) State Raoult’s law (c) What is meant by azeotropicmixture?

Answer»

(a) Vapour pressure of chloroform $(C H C l_{3})$ and dichloromethane $(C H_{2} C l_{2})$ at 298 K are 200 mm Hg and 415 mm Hg respectively. Calculate the vapour pressure of the solution prepared by mixing 25.5 g of CHCl3 and 40 g of $C H_{2} C l_{2} a t 298 K$

(b) State Raoult’s law

(c) What is meant by azeotropicmixture?

Discussion

5008.	Burning of wood and rusting of the iron bar are examples of ___________ reaction.
Answer» Burning of wood and rusting of the iron bar are examples of ___________ reaction.

Discussion

5009.	For the first order decomposition reaction of N2O5, it is observed that (i)N2O5(g)→2NO2(g)+12O2(g);−d[N2O5]dt=k[N2O5](ii)2N2O5(g)→4NO2(g)+O2(g);−d[N2O5]dt=k′[N2O5] Which of the following is true?
Answer» For the first order decomposition reaction of $N_{2} O_{5}$ , it is observed that $(i) N_{2} O_{5} (g) \to 2 N O_{2} (g) + \frac{1}{2} O_{2} (g); \frac{- d [N_{2} O_{5}]}{d t} = k [N_{2} O_{5}] (i i) 2 N_{2} O_{5} (g) \to 4 N O_{2} (g) + O_{2} (g); \frac{- d [N_{2} O_{5}]}{d t} = k^{'} [N_{2} O_{5}]$ Which of the following is true?

Discussion

5010.	The process by which matter in solid state changes to gaseous state, due to an increase in temperature is called as ___________ and reverse of this (gaseous state to solid state), due to a decrease in temperature is called as_________.
Answer» The process by which matter in solid state changes to gaseous state, due to an increase in temperature is called as ___________ and reverse of this (gaseous state to solid state), due to a decrease in temperature is called as_________.

Discussion

5011.	Which of the following is/are ore(s) of copper?
Answer» Which of the following is/are ore(s) of copper?

Discussion

5012.	Explain how droplets are formed.
Answer» Explain how droplets are formed.

Discussion

5013.	Sodium hydroxide reacts with acid forming
Answer» Sodium hydroxide reacts with acid forming

Discussion

5014.	Why H2O +electric current - H^+ + OH^- ?
Answer» Why H2O +electric current - H^+ + OH^- ?

Discussion

5015.	The ozone layer in the earth’s atmosphere absorbs ________ radiation coming from the sun and protects the living organisms on the earth.
Answer» The ozone layer in the earth’s atmosphere absorbs ________ radiation coming from the sun and protects the living organisms on the earth.

Discussion

5016.	How many zones are there in a flame ?
Answer» How many zones are there in a flame ?

Discussion

5017.	Which of the following aqueous solution will conduct an electric current quite well in comparision?
Answer» Which of the following aqueous solution will conduct an electric current quite well in comparision?

5017.

Which of the following aqueous solution will conduct an electric current quite well in comparision?

Answer»

Which of the following aqueous solution will conduct an electric current quite well in comparision?

Discussion

5018.	Pick the odd word out of the following: lead, arsenic, chlorine, cadmium, mercury, nickel.
Answer» Pick the odd word out of the following: lead, arsenic, chlorine, cadmium, mercury, nickel.

Discussion

5019.	Chile saltpeter contains _____
Answer» Chile saltpeter contains _____

Discussion

5020.	Write some of the uses of plastics in healthcare industry.
Answer» Write some of the uses of plastics in healthcare industry.

Discussion

5021.	Question 9 Naphthalene balls are obtained from coal tar and are used as (a) mosquito repellant (b) honeybee repellant (c) moth repellant (d) snake repellant
Answer» Question 9 Naphthalene balls are obtained from coal tar and are used as (a) mosquito repellant (b) honeybee repellant (c) moth repellant (d) snake repellant

Discussion

5022.	Acid rain pollutes ___ .
Answer» Acid rain pollutes ___ .

Discussion

5023.	Which of the following represents data for hydrogen?
Answer» Which of the following represents data for hydrogen?

5023.

Which of the following represents data for hydrogen?

Answer»

Which of the following represents data for hydrogen?

Discussion

5024.	What is the catalyst 'y' used in the water gas shift reaction? Reaction 1: C(red hot coke)+H2O(g)1273K⟶CO(g)+H2(g) Water gas Reaction 2: CO(g)+H2(g)+H2O(g)y (catalyst)⟶CO2(g)+2H2(g)
Answer» What is the catalyst 'y' used in the water gas shift reaction? Reaction 1: $C (r e d h o t c o k e) + H_{2} O (g) 1273 K ⟶ C O (g) + H_{2} (g)$ Water gas Reaction 2: $C O (g) + H_{2} (g) + H_{2} O (g) y (c a t a l y s t) ⟶ C O_{2} (g) + 2 H_{2} (g)$

5024.

What is the catalyst 'y' used in the water gas shift reaction? Reaction 1: C(red hot coke)+H2O(g)1273K⟶CO(g)+H2(g) Water gas Reaction 2: CO(g)+H2(g)+H2O(g)y (catalyst)⟶CO2(g)+2H2(g)

Answer»

What is the catalyst 'y' used in the water gas shift reaction?

Reaction 1: $C (r e d h o t c o k e) + H_{2} O (g) 1273 K ⟶ C O (g) + H_{2} (g)$

Water gas

Reaction 2: $C O (g) + H_{2} (g) + H_{2} O (g) y (c a t a l y s t) ⟶ C O_{2} (g) + 2 H_{2} (g)$

Discussion

5025.	Ram and Shyam are climbing a tree. Ram weighs 50kg and Shyam weighs 60kg. Power expended by Ram and Shyam to climb the tree are in the ratio of 3:2. What is the ratio of time taken by Ram and Shyam to climb the tree?
Answer» Ram and Shyam are climbing a tree. Ram weighs $50kg$ and Shyam weighs $60kg$ . Power expended by Ram and Shyam to climb the tree are in the ratio of $3:2$ . What is the ratio of time taken by Ram and Shyam to climb the tree?

Discussion

5026.	Explain the principle of paper chromatography.
Answer» Explain the principle of paper chromatography.

Discussion

5027.	Why does petroleum oil float over water? [2 MARKS]
Answer» Why does petroleum oil float over water? [2 MARKS]

Discussion

5028.	Why do gaseous fuels have high calorific value?
Answer» Why do gaseous fuels have high calorific value?

Discussion

5029.	A)name one non metal which has metallic lustre? B)What are coinage metals? C)why should food stuffs with acids components be not stored in metallic containers? D)which metals are used for making fine electrical contacts in computers and solar cells?
Answer» A)name one non metal which has metallic lustre? B)What are coinage metals? C)why should food stuffs with acids components be not stored in metallic containers? D)which metals are used for making fine electrical contacts in computers and solar cells?

5029.

A)name one non metal which has metallic lustre? B)What are coinage metals? C)why should food stuffs with acids components be not stored in metallic containers? D)which metals are used for making fine electrical contacts in computers and solar cells?

Answer»

A)name one non metal which has metallic lustre?

B)What are coinage metals?

C)why should food stuffs with acids components be not stored in metallic containers?

D)which metals are used for making fine electrical contacts in computers and solar cells?

Discussion

5030.	A homogeneous mixture is also known as
Answer» A homogeneous mixture is also known as

Discussion

5031.	Answer the following with one word. 1. Most abundant gas is 2. Most important gas for respiration is 3. Most dangerous gas among air pollutants is [3 MARKS]
Answer» Answer the following with one word. 1. Most abundant gas is 2. Most important gas for respiration is 3. Most dangerous gas among air pollutants is [3 MARKS]

Discussion

5032.	Which type of liquid cannot be poured easily?
Answer» Which type of liquid cannot be poured easily?

Discussion

5033.	What are elements and compounds?
Answer» What are elements and compounds?

Discussion

5034.	Which of the following option shows the correct characteristics of metals?
Answer» Which of the following option shows the correct characteristics of metals?

Discussion

5035.	Which one of the following is not a fossil fuel ?
Answer» Which one of the following is not a fossil fuel ?

Discussion

5036.	Why is phosphorus stored in water ?
Answer» Why is phosphorus stored in water ?

Discussion

5037.	At room temperature and under normal conditions, oxygen is a ___ while the other chalcogens are ___.
Answer» At room temperature and under normal conditions, oxygen is a ___ while the other chalcogens are ___.

Discussion

5038.	Which of the below-mentioned groups contain all synthetic substances?
Answer» Which of the below-mentioned groups contain all synthetic substances?

Discussion

5039.	For balancing the number of carbon atoms in the the below equation, the value of Z should be:
Answer» For balancing the number of carbon atoms in the the below equation, the value of Z should be:

5039.

For balancing the number of carbon atoms in the the below equation, the value of Z should be:

Answer»

For balancing the number of carbon atoms in the the below equation, the value of Z should be:

Discussion

5040.	Arrange the following mixtures, suspension, true solution and colloidal solution in the decreasing order of their particle size.
Answer» Arrange the following mixtures, suspension, true solution and colloidal solution in the decreasing order of their particle size.

Discussion

5041.	Write two main difference between the nature of diamond and graphite. [2 MARKS]
Answer» Write two main difference between the nature of diamond and graphite. [2 MARKS]

Discussion

5042.	Why are natural fibres blended with synthetic fibres?
Answer» Why are natural fibres blended with synthetic fibres?

Discussion

5043.	Air can be regarded as a:
Answer» Air can be regarded as a:

Discussion

5044.	Why does metal produce luster and is present in some limited colours
Answer» Why does metal produce luster and is present in some limited colours

Discussion

5045.	Which of the following produces hydrolith with dihydrogen?
Answer» Which of the following produces hydrolith with dihydrogen?

Discussion

5046.	Subscripts in the chemical formula X2Y3 denotes: A. 2 atoms of X combine with 3 atoms of Y to form X2Y3 B.The subscript 2 denotes that valency of X is 2.
Answer» Subscripts in the chemical formula X₂Y₃denotes: A. 2 atoms of X combine with 3 atoms of Y to form X₂Y₃ B.The subscript 2 denotes that valency of X is 2.

5046.

Subscripts in the chemical formula X2Y3 denotes: A. 2 atoms of X combine with 3 atoms of Y to form X2Y3 B.The subscript 2 denotes that valency of X is 2.

Answer»

Subscripts in the chemical formula X₂Y₃denotes:

A. 2 atoms of X combine with 3 atoms of Y to form X₂Y₃

B.The subscript 2 denotes that valency of X is 2.

Discussion

5047.	When do we get to see halogen gas forming at the anode?
Answer» When do we get to see halogen gas forming at the anode?

Discussion

5048.	Which is not a non-renewable source of energy?
Answer» Which is not a non-renewable source of energy?

Discussion

5049.	Which among the following is not a natural polymer?
Answer» Which among the following is not a natural polymer?

Discussion

5050.	A boy poured honey into a bowl, he tried to break the flow of honey with his fingers but found it difficult, which of the following may be the reason?
Answer» A boy poured honey into a bowl, he tried to break the flow of honey with his fingers but found it difficult, which of the following may be the reason?

Discussion

Explore topic-wise InterviewSolutions in .

Which catalyst is used in bosch process when water gas is mixed with excess steam?

I am a microbe which lives in polluted water. During the rainy season I make many people fall ill. I cause a disease known as typhoid. Who am I?

Which of the following is not correct?

An energy level has a fixed number of electrons. But when electrons jump from ground state to their excited state...the number of electrons in the excited state should increase and in the ground state should decrease.... So the formula of 2n^2 would not work! !!

Give two examples each. A.liquid element. B. Gaseous element. C.solid element. D. Homogeneous mixture. E. Colloid. F. Organic compound. G. Complex compound. H. Inorganic compound. I.metalloid. J. Element with valency 1. K. Element with valency 2

Which inert gas is used in the advertisement hoarding shown in the given picture?

(a) Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 298 K are 200 mm Hg and 415 mm Hg respectively. Calculate the vapour pressure of the solution prepared by mixing 25.5 g of CHCl3 and 40 g of CH2Cl2 at 298 K (b) State Raoult’s law (c) What is meant by azeotropicmixture?

Burning of wood and rusting of the iron bar are examples of ___________ reaction.

For the first order decomposition reaction of N2O5, it is observed that (i)N2O5(g)→2NO2(g)+12O2(g);−d[N2O5]dt=k[N2O5](ii)2N2O5(g)→4NO2(g)+O2(g);−d[N2O5]dt=k′[N2O5] Which of the following is true?

The process by which matter in solid state changes to gaseous state, due to an increase in temperature is called as ___________ and reverse of this (gaseous state to solid state), due to a decrease in temperature is called as_________.

Which of the following is/are ore(s) of copper?

Explain how droplets are formed.

Sodium hydroxide reacts with acid forming

Why H2O +electric current - H^+ + OH^- ?

The ozone layer in the earth’s atmosphere absorbs ________ radiation coming from the sun and protects the living organisms on the earth.

How many zones are there in a flame ?

Which of the following aqueous solution will conduct an electric current quite well in comparision?

Pick the odd word out of the following: lead, arsenic, chlorine, cadmium, mercury, nickel.

Chile saltpeter contains _____

Write some of the uses of plastics in healthcare industry.

Question 9 Naphthalene balls are obtained from coal tar and are used as (a) mosquito repellant (b) honeybee repellant (c) moth repellant (d) snake repellant

Acid rain pollutes ___ .

Which of the following represents data for hydrogen?

What is the catalyst 'y' used in the water gas shift reaction? Reaction 1: C(red hot coke)+H2O(g)1273K⟶CO(g)+H2(g) Water gas Reaction 2: CO(g)+H2(g)+H2O(g)y (catalyst)⟶CO2(g)+2H2(g)

Ram and Shyam are climbing a tree. Ram weighs 50kg and Shyam weighs 60kg. Power expended by Ram and Shyam to climb the tree are in the ratio of 3:2. What is the ratio of time taken by Ram and Shyam to climb the tree?

Explain the principle of paper chromatography.

Why does petroleum oil float over water? [2 MARKS]

Why do gaseous fuels have high calorific value?

A)name one non metal which has metallic lustre? B)What are coinage metals? C)why should food stuffs with acids components be not stored in metallic containers? D)which metals are used for making fine electrical contacts in computers and solar cells?

A homogeneous mixture is also known as

Answer the following with one word. 1. Most abundant gas is 2. Most important gas for respiration is 3. Most dangerous gas among air pollutants is [3 MARKS]

Which type of liquid cannot be poured easily?

What are elements and compounds?

Which of the following option shows the correct characteristics of metals?

Which one of the following is not a fossil fuel ?

Why is phosphorus stored in water ?

At room temperature and under normal conditions, oxygen is a ___ while the other chalcogens are ___.

Which of the below-mentioned groups contain all synthetic substances?

For balancing the number of carbon atoms in the the below equation, the value of Z should be:

Arrange the following mixtures, suspension, true solution and colloidal solution in the decreasing order of their particle size.

Write two main difference between the nature of diamond and graphite. [2 MARKS]

Why are natural fibres blended with synthetic fibres? ​​​​​

Air can be regarded as a:

Why does metal produce luster and is present in some limited colours

Which of the following produces hydrolith with dihydrogen?

Subscripts in the chemical formula X2Y3 denotes: A. 2 atoms of X combine with 3 atoms of Y to form X2Y3 B.The subscript 2 denotes that valency of X is 2.

When do we get to see halogen gas forming at the anode?

Which is not a non-renewable source of energy?

Which among the following is not a natural polymer?

A boy poured honey into a bowl, he tried to break the flow of honey with his fingers but found it difficult, which of the following may be the reason?

The process by which matter in solid state changes to gaseous state, due to an increase in temperature is called as ___ and reverse of this (gaseous state to solid state), due to a decrease in temperature is called as_.

At room temperature and under normal conditions, oxygen is a _ while the other chalcogens are _.

Why are natural fibres blended with synthetic fibres?