Chemistry Test 45

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Chemistry Test 45

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Weekly Quiz Competition

Question 1
4 / -1

Consider the following statements :-

(A) Unit of molar entropy of a substance in SI system is J/K

(B) Molar entropy of vapourisation of water is negative

(C) In free expansion, work done is zero

(D) At absolute zero temperature, entropy of all substance is zero

Then correct order of true/false of the above statements is

A
FFTF

B
FFFF

C
TFTT

D
TTTT
Question 2
4 / -1

Which of the following expressions is true in case of a sodium chloride unit cell ?

A
r_c + r_a = a

B
r_c + r_a = a / 2

C
r_c + r_a = 2a

D
r_c - r_a = 2a
Question 3
4 / -1

The Brownian motion of colloidal particles is due to :-

A
Temperature fluctuations within the liquid phase

B
Attraction and repulsion between charges on the colloidal particles

C
Impact of the molecules of the dispersion medium on the colloidal particles

D
None of these
Question 4
4 / -1

For which reduction, ore should be partially roasted is :-

A
Smelting

B
Auto reduction

C
Alumino thermite process

D
Metal displacement
Question 5
4 / -1

The bond dissociation energies of CH₄ and C₂H₆ respectively are 360 and 620 kcal mol^–1. The C–C bond energy would be :-

A
260 kcal mol^–1

B
180 kcal mol^–1

C
130 kcal mol^–1

D
80 kcal mol^–1

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Chemistry Test 45

Result

Chemistry Test 45

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SHARING IS CARING

Question 1

FFTF

FFFF

TFTT

TTTT

Question 2

rc + ra = a

rc + ra = a / 2

rc + ra = 2a

rc - ra = 2a

Question 3

Temperature fluctuations within the liquid phase

Attraction and repulsion between charges on the colloidal particles

Impact of the molecules of the dispersion medium on the colloidal particles

None of these

Question 4

Smelting

Auto reduction

Alumino thermite process

Metal displacement

Question 5

260 kcal mol–1

180 kcal mol–1

130 kcal mol–1

80 kcal mol–1

User

Question Analysis

My Perfomance

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Rank

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r_c + r_a = a

r_c + r_a = a / 2

r_c + r_a = 2a

r_c - r_a = 2a

260 kcal mol^–1

180 kcal mol^–1

130 kcal mol^–1

80 kcal mol^–1