Chemistry MCQ Quiz Hub

Browse questions and answers for the Chemistry MCQ Question - ThermoChemistry quiz.

Ice is ___________ crystal

1. Metallic

2. Molecular

3. Covalent

4. Ionic

✅ Correct Answer: 2

Select a pair of compounds which are isomorphic in nature.

1. NaCI and KNO3

2. MgO and NaF

3. KNO3 and MgO

4. NaF and CaCO3

✅ Correct Answer: 2

The viscosity of solids is

1. Infinite

2. Negligible

3. Medium

4. No concept of viscosity in solid

✅ Correct Answer: 1

a?b?c ?????#90? is representation of crystal system

1. Monoclinic

2. Triclinic

3. Hexagonal

4. Trigonal

✅ Correct Answer: 2

The phenomenon in which a compound exists in two or more crystalline forms is called

1. Isomorphism

2. Polymorphism

3. Anisotropy

4. Allotropy

✅ Correct Answer: 2

Which solids are called true solids?

1. Metallic

2. Amorphous

3. Crystalline

4. Vitreous

✅ Correct Answer: 3

Bucky balls is an allotropic from of

1. Sulphur

2. Carbon

3. Silica

4. Tin

✅ Correct Answer: 2

The number amino acid units for each turn of helix on average are

1. 21

2. 23

3. 25

4. 27

✅ Correct Answer: 4

Isomorphic substances have

1. Same physical and chemical properties

2. Same physical and different chemical properties

3. Different physical and same chemical properties

4. Different physical and chemical properties

✅ Correct Answer: 4

If a physical and chemical change takes place at a constant pressure then the heat change during the process is called

1. Heat of transition

2. Heat of fusion

3. Enthalpy change

4. All of above

✅ Correct Answer: 3

The pressure during the molar heat of fusion is kept

1. 0 atmosphere

2. one atmosphere

3. 2 atmosphere

4. 10 atmosphere

✅ Correct Answer: 2

The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is

1. Molar heat of sublimation

2. Molar heat of fusion

3. Molar heat of vapourization

4. Latent heat of that liquid

✅ Correct Answer: 3

All the enthalpy changes are

1. Negative

2. Positive

3. May or may not be a or b

4. none

✅ Correct Answer: 3

Which one is not state function

1. Internal energy

2. Enthalpy

3. Gibbs free energy

4. Work

✅ Correct Answer: 4

If ?H value is less than zero than reaction will be

1. Exothermic

2. Endothermic

3. May or may not be Exothormic or Endothermic

4. None of these

✅ Correct Answer: 1

If internal energy of the system is increased

1. Change in state of the system is increased

2. Temperature of the ystem may rise

3. Chemical reaction may take place

4. All

✅ Correct Answer: 4

Which is true for a spontaneous endothermic process?

1. ?H<0

2. ?G<0

3. ?S<0

4. ?G>0

✅ Correct Answer: 2

A reaction has values of ?H and ?S which are both positive. The reaction

1. Is spontaneous

2. Spontaneity is temperature dependent

3. Has an increasing free energy

4. Is non-spontaneous

✅ Correct Answer: 4

________________ is study about energy of a chemical system

1. thermochemistry

2. thermodynamics

3. chemical kinetics

4. stoichiometry

✅ Correct Answer: 1

The environment in which a system is studied is

1. State function

2. phase

3. surrounding

4. state

✅ Correct Answer: 3

Unit of heat in SI system is

1. J

2. KCaL

3. Cal

4. GJ

✅ Correct Answer: 1

Anything which depends upon initial and final state of a system is

1. environment

2. surrounding

3. state function

4. enthalpy

✅ Correct Answer: 3

Total energy of a system is

1. P.E + K.E

2. P.E + heat energy

3. K.E + heat energy

4. P.E + mechanical energy

✅ Correct Answer: 1

Mathematical form of first law of thermodynamics is

1. ?H=qp

2. ?E = q + W

3. ?E = q x v

4. all of the above

✅ Correct Answer: 2

Reaction in which heat evolves is called

1. endothermic

2. spontaneous

3. non-spontaneous

4. exothermic

✅ Correct Answer: 4

CuSO4 + Zn?ZnSO4+Cu is

1. Spontaneous reaction

2. Non-spontaneous reaction

3. Endothermic

4. Exothermic

✅ Correct Answer: 1

Pumping of water uphill is

1. spontaneous process

2. non-spontaneous process

3. irreversible process

4. reversible process

✅ Correct Answer: 2

State function the macroscopic property of system depends upon

1. path of reaction

2. initial state

3. final state

4. initial and final state

✅ Correct Answer: 4

Which one of the following is a state function?

1. pressure

2. temperature

3. enthalpy

4. all of the above

✅ Correct Answer: 4

When enthalpy of reactants is higher than product then reaction will be

1. endothermic

2. spontaneous

3. non-spontaneous

4. exothermic

✅ Correct Answer: 4

Enthalpy of a reaction can be measured by

1. glass calorimeter

2. manometer

3. Barometer

4. thermometer

✅ Correct Answer: 1

Enthalpy of combustion for food fuel and other compounds can be measured accurately by

1. glass calorimeter

2. bomb calorimeter

3. thermometer

4. manometer

✅ Correct Answer: 2

The attice energy of NaCl is

1. ?787 KJ/mole

2. 787 J/mole

3. 780 KJ/mole

4. 790 KJ/mole

✅ Correct Answer: 1

Most of thermodynamic parameters are

1. system

2. surrounding

3. phase

4. state functions

✅ Correct Answer: 4

?H of a system can be calculated by which of following relationship

1. q=m x s x ?T

2. q=?E

3. q=m x v x ?T

4. q = pv

✅ Correct Answer: 1

Change in enthalpy (H) of a system can be calculated by following relationship

1. ?H=?E+P?V

2. ?H=?E-PV

3. ?H=?E-q

4. ?H=?E+q

✅ Correct Answer: 1

Which of the following is correct

1. qp>qv

2. ?E < ?H

3. ?E>?H

4. Both a & b

✅ Correct Answer: 1

Two fundamental ways to transfer energy are

1. pressure and temperature

2. pressure and volume

3. heat and work

4. heat and volume

✅ Correct Answer: 3

Which of the following processes has always ?H = -ve

1. formation of compound

2. combustion

3. dissolution of ionic compound

4. dilution of a solution

✅ Correct Answer: 2

Enthalpy change can be

1. calculated by Hess law

2. can be measured by calorimeter

3. both a and b

4. none

✅ Correct Answer: 3

If there is interconversion of solid and liquid states then

1. ?V = 0

2. ?H= ?E

3. ?H > ?E

4. both a & b

✅ Correct Answer: 2

In order to determine ?hlatt of ionic compound which is correct relationship

1. ?hlatt = ?Hf - ?Hx

2. ?hlatt = ?Hf + ?Hx

3. ?hlatt = ?Ha + ?Hv

4. ?hlatt = ?Hf - ?hsol

✅ Correct Answer: 1

Hess law can be applied to determine

1. ?Hf

2. ?Hlatt

3. ?Hcomb

4. All of the above

✅ Correct Answer: 4

Which of the following element act as inert electrode

1. Cu

2. Ag

3. Pt

4. None

✅ Correct Answer: 3

If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs?

1. H2 is deposited at cathode

2. Colour of the solution becomes fade

3. Cu is deposited at anode

4. All are possible

✅ Correct Answer: 2

Stronger the oxidizing agent greater is the

1. Oxidation potential

2. Reduction potential

3. Redox potential

4. emf of cell

✅ Correct Answer: 2

Which has maximum oxidation number?

1. N

2. Cr

3. S

4. Mn

✅ Correct Answer: 4

Which of the following cell is not rechargeable?

1. Lead storage battery

2. Silver oxide cell

3. Fuel cell

4. Ni-Cd cell

✅ Correct Answer: 2

In an electrolytic cell current flows ?

1. From cathode to anode in outer circuit

2. From anode to cathode outside the cell

3. From cathode to anode inside the cell

4. both b & c

✅ Correct Answer: 2

Which of the following is true in the case of Zn-Cu cell?

1. The flow of electrons takes place from copper to zinc

2. E0red of copper electrode is less than that of zinc electrode

3. Zinc acts as an anode and copper as cathode

4. All are correct

✅ Correct Answer: 3