Chem Mantra
HomeCoursesOnline TestsForum
ForumQuestion Bank

Chemistry Question Bank

19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.

19,398 questions found — Page 13 of 776
MEDIUMMCQ MULTIPLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Thermodynamics is not concerned about____.

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Closed system can exchange (with surroundings)

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Which of the following quantities is not a state function?

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

The volume of gas is reduced to half from its original volume. The specific heat will____.

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Thermodynamics deals with

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Which of the following macroscopic variable is not measurable?

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Which of the following reactions define o f G ? (a) diamond C O g CO g → (b) H g F g HF g → (c) H P O H O 2H PO → (d) SO g O g SO g →

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Which of the following is a state function?

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

The state of a thermodynamic system is represented by

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Tea placed in thermos flask is an example of

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

In which of the following cases, the reaction is spontaneous at all temperatures ?

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

H and E  for the reaction, Fe O s 3H g 2Fe s H O l → at constant temperature are related as (a) H E (b) H E RT (c) H E RT (d) H E 3RT

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Cell reaction is spontaneous when (a) G is negative (b) G is positive (c) red G is positive (d) red G is negative

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Enthalpy change for the reaction, 4H(g)  → 2H₂(g) is – 869.5 kJ. The dissociation energy of H–H bond is

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

For the reaction, X2O₄(l) → 2XO₂(g) ∆U = 2.1 kcal, ∆S = 20 cal K–1 at 300 K Hence, ∆G is (2014)

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

A thermally isolated gaseous system can exchange energy with the surroundings. The mode of energy may be

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Which law states that entropy of all pure crystalline solids is zero at absolute zero?

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

A reaction has ∆H = – 33 kJ and ∆S = +58 J/K. This reaction would be :

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

One mole of an ideal diatomic gas (Cv = 5 cal) was transformed from initial 25°C and 1 L to the state when temperature is 100°C and volume 10 L. The entropy change of the process can be expressed as (R = 2 calories/mo…

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

It is impossible for a reaction to take place if (a) H is +ve and  S  is +ve (b) H is –ve and  S  is +ve (c) H is +ve and  S  is –ve (d) H is –ve and  S  is –ve

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

The entropy change when two moles of ideal monoatomic gas is heated from 200°C to 300°C reversibly and isochorically?

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

In which case change in entropy is negative?

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

When one mole of an ideal gas is compressed to half of its initial volume and simultaneously heated to twice its initial temperature, the change in entropy of gas (∆S) is :

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Pick out the wrong statement

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

G H T S when H S Hence, Correct option is c

← Previous10111213141516Next →
Sponsored

Master Chemistry for JEE, NEET & IChO

Access 19,000+ solved questions with expert explanations, chapter-wise tests, and full video lectures.

Explore Courses →Sign In Free

Difficulty

EasyMediumHard

Question Type

MCQMSQINTEGERSUBJECTIVE

Course

IChO (Chemistry Olympiad)JEE Advanced ChemistryJEE Mains ChemistryNEET Chemistry