10223 + Interview Questions in Chemistry Page 187 InterviewSolution

9301.	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

9302.	Which of the following options do not contain dissolved solids?
Answer» Which of the following options do not contain dissolved solids?

Discussion

9303.	Water has a _______dielectric constant.
Answer» Water has a _______dielectric constant.

Discussion

9304.	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

9305.	The valency of atoms can be zero when:
Answer» The valency of atoms can be zero when:

Discussion

9306.	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

9307.	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

9308.	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

9309.	What is a chemical change? Give two examples. [2 MARKS]
Answer» What is a chemical change? Give two examples. [2 MARKS]

Discussion

9310.	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

9310.

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

9311.	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

9312.	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.

9312.

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

9313.	Describe the methods of saving ozone layer.
Answer» Describe the methods of saving ozone layer.

Discussion

9314.	Define the following terms : (i) pollution (ii) pollutant (iii) air pollution.
Answer» Define the following terms : (i) pollution (ii) pollutant (iii) air pollution.

9314.

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

Answer»

Define the following terms :

(i) pollution

(ii) pollutant

(iii) air pollution.

Discussion

9315.	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

9316.	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

9317.	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

9318.	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

9319.	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

9320.	What is the chemical formula of dry ice
Answer» What is the chemical formula of dry ice

Discussion

9321.	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

9322.	The electric charge on a proton is_________
Answer» The electric charge on a proton is_________

Discussion

9323.	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

9324.	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

9325.	What are the 7 forms of a state ?
Answer» What are the 7 forms of a state ?

Discussion

9326.	Is salt a pure substance ?
Answer» Is salt a pure substance ?

Discussion

9327.	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

9328.	What is mean by matter is made up of discrete particles?
Answer» What is mean by matter is made up of discrete particles?

Discussion

9329.	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

9330.	Which of the following expresses Charle's law?
Answer» Which of the following expresses Charle's law?

Discussion

9331.	Spin quantum number was introduced because of
Answer» Spin quantum number was introduced because of

Discussion

9332.	How does a proton differ from an electron?
Answer» How does a proton differ from an electron?

Discussion

9333.	Explain diffusion phenomenon based on the state of matter
Answer» Explain diffusion phenomenon based on the state of matter

Discussion

9334.	What is X ?
Answer» What is X ?

9334.

What is X ?

Answer»

What is X ?

Discussion

9335.	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

9336.	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)

9336.

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

9337.	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

9338.	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

9339.	Which of the following metal can successfully displace the hydrogen?
Answer» Which of the following metal can successfully displace the hydrogen?

Discussion

9340.	__________ are the nuclei of helium atoms.
Answer» __________ are the nuclei of helium atoms.

Discussion

9341.	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

9342.	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

9342.

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

9343.	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: $C O (g) + H_{2} (g) + H_{2} O (g)$ $y (c a t a l y s t) ⟶ C O_{2} (g) + 2 H_{2} (g)$

9343.

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

9344.	Explain Thomson's model in brief. [2 MARKS]
Answer» Explain Thomson's model in brief. [2 MARKS]

Discussion

9345.	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

9346.	Explain the half-life period.
Answer» Explain the half-life period.

Discussion

9347.	Cigarette or gas lighter is made up of
Answer» Cigarette or gas lighter is made up of

Discussion

9348.	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.

9348.

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

9349.	Choose the correct option: Covalent bond is___.
Answer» Choose the correct option: Covalent bond is___.

Discussion

9350.	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.

9350.

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 .

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.