10223 + Interview Questions in Chemistry

1.	Which one of the following statement is not true about an atom?
Answer» Which one of the following statement is not true about an atom?

Discussion

2.	Which of the following options do not contain dissolved solids?
Answer» Which of the following options do not contain dissolved solids?

Discussion

3.	Water has a _______dielectric constant.
Answer» Water has a _______dielectric constant.

Discussion

4.	Do all the protons,electron and neutrons of atoms of different element are same???
Answer» Do all the protons,electron and neutrons of atoms of different element are same???

Discussion

5.	The valency of atoms can be zero when:
Answer» The valency of atoms can be zero when:

Discussion

6.	Sulfuryl chloride (SO2Cl2) reacts with water to give a mixture of H2SO4 and HCl. How many moles of baryta would be required to neutralize the solution formed by adding 1 mole of SO2Cl2 to excess of water ?
Answer» Sulfuryl chloride $(S O_{2} C l_{2})$ reacts with water to give a mixture of $H_{2} S O_{4}$ and HCl. How many moles of baryta would be required to neutralize the solution formed by adding 1 mole of $S O_{2} C l_{2}$ to excess of water ?

Discussion

7.	Hydrogen gas leaked out of a cylinder and only one gram of it was left. How many molecules are there in this one gram of hydrogen gas that is in constant random motion?
Answer» Hydrogen gas leaked out of a cylinder and only one gram of it was left. How many molecules are there in this one gram of hydrogen gas that is in constant random motion?

Discussion

8.	In the Modern Periodic Table, the elements are arranged on the basis of their increasing:
Answer» In the Modern Periodic Table, the elements are arranged on the basis of their increasing:

Discussion

9.	What is a chemical change? Give two examples. [2 MARKS]
Answer» What is a chemical change? Give two examples. [2 MARKS]

Discussion

10.	Explain the formation of acid rain due to : (i) oxides of sulphur (ii) oxides of nitrogen
Answer» Explain the formation of acid rain due to : (i) oxides of sulphur (ii) oxides of nitrogen

10.

Explain the formation of acid rain due to : (i) oxides of sulphur (ii) oxides of nitrogen

Answer»

Explain the formation of acid rain due to :

(i) oxides of sulphur

(ii) oxides of nitrogen

Discussion

11.	Question 1 (a) Classify the following as chemical or physical changes: a. Cutting of trees
Answer» Question 1 (a) Classify the following as chemical or physical changes: a. Cutting of trees

Discussion

12.	Match the atomic numbers 4, 14, 8, 15, and 19 with each of the following : (a) A solid non-metal of valency 3. (b) A gas of valency 2. (c) A metal of valency 1. (d) A non-metal of valency 4.
Answer» Match the atomic numbers 4, 14, 8, 15, and 19 with each of the following : (a) A solid non-metal of valency 3. (b) A gas of valency 2. (c) A metal of valency 1. (d) A non-metal of valency 4.

12.

Match the atomic numbers 4, 14, 8, 15, and 19 with each of the following : (a) A solid non-metal of valency 3. (b) A gas of valency 2. (c) A metal of valency 1. (d) A non-metal of valency 4.

Answer»

Match the atomic numbers 4, 14, 8, 15, and 19 with each of the following :

(a) A solid non-metal of valency 3.

(b) A gas of valency 2.

(c) A metal of valency 1.

(d) A non-metal of valency 4.

Discussion

13.	Describe the methods of saving ozone layer.
Answer» Describe the methods of saving ozone layer.

Discussion

14.	Define the following terms : (i) pollution (ii) pollutant (iii) air pollution.
Answer» Define the following terms : (i) pollution (ii) pollutant (iii) air pollution.

14.

Define the following terms : (i) pollution (ii) pollutant (iii) air pollution.

Answer»

Define the following terms :

(i) pollution

(ii) pollutant

(iii) air pollution.

Discussion

15.	Arrange Ce+3,La+3,Pm+3 and Yb+3 in increasing order of their ionic radii
Answer» Arrange $C e^{+ 3}, L a^{+ 3}, P m^{+ 3}$ and $Y b^{+ 3}$ in increasing order of their ionic radii

Discussion

16.	Calculate the molar mass of the following substances [3 MARKS] 1. Ethyne, C2H2 2. Nitric acid, HNO3 3. Methane, CH4
Answer» Calculate the molar mass of the following substances [3 MARKS] 1. Ethyne, C₂H₂ 2. Nitric acid, HNO₃ 3. Methane, CH₄

Discussion

17.	Question 2 (a) What is the physical state of water at: a.250∘C
Answer» Question 2 (a) What is the physical state of water at: $a . 250^{\circ} C$

Discussion

18.	Which process can be used to separate ionic impurities from petroleum products?
Answer» Which process can be used to separate ionic impurities from petroleum products?

Discussion

19.	Define 'boiling point' of a substance ? What is the boiling point of water ?
Answer» Define 'boiling point' of a substance ? What is the boiling point of water ?

Discussion

20.	What is the chemical formula of dry ice
Answer» What is the chemical formula of dry ice

Discussion

21.	When the number of protons and electrons are equal, atom acquires a __________ character.
Answer» When the number of protons and electrons are equal, atom acquires a __________ character.

Discussion

22.	The electric charge on a proton is_________
Answer» The electric charge on a proton is_________

Discussion

23.	Which one of the following elements has two valence electrons but is a noble gas?
Answer» Which one of the following elements has two valence electrons but is a noble gas?

Discussion

24.	Instead of gaining 1 electron , why does the hydrogen atom loses 1 electron ?
Answer» Instead of gaining 1 electron , why does the hydrogen atom loses 1 electron ?

Discussion

25.	What are the 7 forms of a state ?
Answer» What are the 7 forms of a state ?

Discussion

26.	Is salt a pure substance ?
Answer» Is salt a pure substance ?

Discussion

27.	Choose the correct option: Zn(OH)2+___→ZnSO4+2H2O
Answer» Choose the correct option: $Z n (O H)_{2} +$ ___ $\to Z n S O_{4} + 2 H_{2} O$

Discussion

28.	What is mean by matter is made up of discrete particles?
Answer» What is mean by matter is made up of discrete particles?

Discussion

29.	When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observaton tell us about the nature of potassium permanganate and water ?
Answer» When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observaton tell us about the nature of potassium permanganate and water ?

Discussion

30.	Which of the following expresses Charle's law?
Answer» Which of the following expresses Charle's law?

Discussion

31.	Spin quantum number was introduced because of
Answer» Spin quantum number was introduced because of

Discussion

32.	How does a proton differ from an electron?
Answer» How does a proton differ from an electron?

Discussion

33.	Explain diffusion phenomenon based on the state of matter
Answer» Explain diffusion phenomenon based on the state of matter

Discussion

34.	What is X ?
Answer» What is X ?

34.

What is X ?

Answer»

What is X ?

Discussion

35.	Elements in the same vertical group of the Modern Periodic Table have same:
Answer» Elements in the same vertical group of the Modern Periodic Table have same:

Discussion

36.	The mass of 0.5 moles of Water molecules is: (Atomic mass, H =1; O = 16)
Answer» The mass of 0.5 moles of Water molecules is: (Atomic mass, H =1; O = 16)

36.

The mass of 0.5 moles of Water molecules is: (Atomic mass, H =1; O = 16)

Answer»

The mass of 0.5 moles of Water molecules is:

(Atomic mass, H =1; O = 16)

Discussion

37.	Why electrons revolve around atoms? and what is charge produced by it?
Answer» Why electrons revolve around atoms? and what is charge produced by it?

Discussion

38.	If the pH value of a substance is below seven then it is ______ in nature.
Answer» If the pH value of a substance is below seven then it is ______ in nature.

Discussion

39.	Which of the following metal can successfully displace the hydrogen?
Answer» Which of the following metal can successfully displace the hydrogen?

Discussion

40.	__________ are the nuclei of helium atoms.
Answer» __________ are the nuclei of helium atoms.

Discussion

41.	Which of the following letters were used in the Niels Bohr model of the atom for representing the orbits or shells?
Answer» Which of the following letters were used in the Niels Bohr model of the atom for representing the orbits or shells?

Discussion

42.	Match the entries given in column A with appropriate ones from column B
Answer» Match the entries given in column A with appropriate ones from column B

42.

Match the entries given in column A with appropriate ones from column B

Answer»

Match the entries given in column A with appropriate ones from column B

Discussion

43.	What is the catalyst 'y' used in the water gas shift reaction? Reaction 1: C(red hot coke) + H2OWater gas(g) 1273K⟶ CO(g)+H2(g) 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(red hot coke) + $H_{2} O Water gas$ (g) $1273 K ⟶$ $C O (g) + H_{2} (g)$ Reaction 2: $C O (g) + H_{2} (g) + H_{2} O (g)$ $y (c a t a l y s t) ⟶ C O_{2} (g) + 2 H_{2} (g)$

43.

What is the catalyst 'y' used in the water gas shift reaction? Reaction 1: C(red hot coke) + H2OWater gas(g) 1273K⟶ CO(g)+H2(g) 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(red hot coke) + $H_{2} O Water gas$ (g) $1273 K ⟶$ $C O (g) + H_{2} (g)$

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

44.	Explain Thomson's model in brief. [2 MARKS]
Answer» Explain Thomson's model in brief. [2 MARKS]

Discussion

45.	AH2(g)+BV2O5(s)→CV2O3(s)+DH2O(l) A, B, C and D are the coefficients in the reaction given above. Identify the correct relation between these coefficients so that the reaction is balanced?
Answer» ${AH}_{2} (g) + {BV}_{2} O_{5} (s) \to {CV}_{2} O_{3} (s) + {DH}_{2} O(l)$ A, B, C and D are the coefficients in the reaction given above. Identify the correct relation between these coefficients so that the reaction is balanced?

Discussion

46.	Explain the half-life period.
Answer» Explain the half-life period.

Discussion

47.	Cigarette or gas lighter is made up of
Answer» Cigarette or gas lighter is made up of

Discussion

48.	State whether the following statement is true or false : Milk is a pure substance.
Answer» State whether the following statement is true or false : Milk is a pure substance.

48.

State whether the following statement is true or false : Milk is a pure substance.

Answer»

State whether the following statement is true or false :

Milk is a pure substance.

Discussion

49.	Choose the correct option: Covalent bond is___.
Answer» Choose the correct option: Covalent bond is___.

Discussion

50.	Explain : (a) octet rule for formation of sodium chloride (b) duplet rule for formation of hydrogen.
Answer» Explain : (a) octet rule for formation of sodium chloride (b) duplet rule for formation of hydrogen.

50.

Explain : (a) octet rule for formation of sodium chloride (b) duplet rule for formation of hydrogen.

Answer»

Explain :

(a) octet rule for formation of sodium chloride

(b) duplet rule for formation of hydrogen.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which one of the following statement is not true about an atom?

Which of the following options do not contain dissolved solids?

Water has a _______dielectric constant.

Do all the protons,electron and neutrons of atoms of different element are same???

The valency of atoms can be zero when:

Sulfuryl chloride (SO2Cl2) reacts with water to give a mixture of H2SO4 and HCl. How many moles of baryta would be required to neutralize the solution formed by adding 1 mole of SO2Cl2 to excess of water ?

Hydrogen gas leaked out of a cylinder and only one gram of it was left. How many molecules are there in this one gram of hydrogen gas that is in constant random motion?

In the Modern Periodic Table, the elements are arranged on the basis of their increasing:

What is a chemical change? Give two examples. [2 MARKS]

Explain the formation of acid rain due to : (i) oxides of sulphur (ii) oxides of nitrogen

Question 1 (a) Classify the following as chemical or physical changes: a. Cutting of trees

Match the atomic numbers 4, 14, 8, 15, and 19 with each of the following : (a) A solid non-metal of valency 3. (b) A gas of valency 2. (c) A metal of valency 1. (d) A non-metal of valency 4.

Describe the methods of saving ozone layer.

Define the following terms : (i) pollution (ii) pollutant (iii) air pollution.

Arrange Ce+3,La+3,Pm+3 and Yb+3 in increasing order of their ionic radii

Calculate the molar mass of the following substances [3 MARKS] 1. Ethyne, C2H2 2. Nitric acid, HNO3 3. Methane, CH4

Question 2 (a) What is the physical state of water at: a.250∘C

Which process can be used to separate ionic impurities from petroleum products?

Define 'boiling point' of a substance ? What is the boiling point of water ?

What is the chemical formula of dry ice

When the number of protons and electrons are equal, atom acquires a __________ character.

The electric charge on a proton is_________

Which one of the following elements has two valence electrons but is a noble gas?

Instead of gaining 1 electron , why does the hydrogen atom loses 1 electron ?

What are the 7 forms of a state ?

Is salt a pure substance ?

Choose the correct option: Zn(OH)2+___→ZnSO4+2H2O

What is mean by matter is made up of discrete particles?

When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observaton tell us about the nature of potassium permanganate and water ?

Which of the following expresses Charle's law?

Spin quantum number was introduced because of

How does a proton differ from an electron?

Explain diffusion phenomenon based on the state of matter

What is X ?

Elements in the same vertical group of the Modern Periodic Table have same:

The mass of 0.5 moles of Water molecules is: (Atomic mass, H =1; O = 16)

Why electrons revolve around atoms? and what is charge produced by it?

If the pH value of a substance is below seven then it is ______ in nature.

Which of the following metal can successfully displace the hydrogen?

__________ are the nuclei of helium atoms.

Which of the following letters were used in the Niels Bohr model of the atom for representing the orbits or shells?

Match the entries given in column A with appropriate ones from column B

What is the catalyst 'y' used in the water gas shift reaction? Reaction 1: C(red hot coke) + H2OWater gas(g) 1273K⟶ CO(g)+H2(g) Reaction 2: CO(g)+H2(g)+H2O(g) y (catalyst)⟶CO2(g)+2H2(g)

Explain Thomson's model in brief. [2 MARKS]

AH2(g)+BV2O5(s)→CV2O3(s)+DH2O(l) A, B, C and D are the coefficients in the reaction given above. Identify the correct relation between these coefficients so that the reaction is balanced?

Explain the half-life period.

Cigarette or gas lighter is made up of

State whether the following statement is true or false : Milk is a pure substance.

Choose the correct option: Covalent bond is___.

Explain : (a) octet rule for formation of sodium chloride (b) duplet rule for formation of hydrogen.