Chemistry Test 69

Result

Chemistry Test 69

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Weekly Quiz Competition

Question 1
4 / -1

A molecule M associates in a given solvent according to the equation M ⇌ (M)_n.For a certain concentration of M, the van’t Hoff factor was found to be 0.9 and the fraction of associated molecules was 0.2. The value of n is:

A
3

B
5

C
2

D
4
Question 2
4 / -1

The solubility order for alkali metal fluoride in water is:

A
LiF < RbF < KF < NaF

B
RbF < KF < NaF < LiF

C
LiF > NaF > KF > RbF

D
LiF < NaF < KF < RbF
Question 3
4 / -1

XeO₄ molecule is tetrahedral having:

A
Two pπ – dπ bonds

B
One pπ – dπ bonds

C
Four pπ – dπ bonds

D
Three pπ – dπ bonds
Question 4
4 / -1

The reaction X → Y is an exothermic reaction. Activation energy of the reaction for X into Y is 150 kJ mol^–1. Enthalpy of reaction is 135 kJ mol^–1. The activation energy for reverse reaction, Y → X will be:

A
280 kJ mol^–1

B
285 kJ mol^–1

C
270 kJ mol^–1

D
15 kJ mol^–1
Question 5
4 / -1

For which of the following compounds Kjeldahl method can be used to determine the percentage of Nitrogen?

A
Nitrobenzene

B
Pyridine

C
Alanine

D
Diazomethane
Question 6
4 / -1

Which of the following statements about aspirin is not true?

A
It is effective in relieving pain

B
It is a neurologically active drug

C
It has antiblood clotting action

D
It belongs to narcotic analgesics
Question 7
4 / -1

The density of 3M solution of sodium chloride is 1.252 g mL^–1. The molality of the solution will be:

(molar mass, NaCl = 58.5 g mol^–1)

A
2.60 m

B
2.18 m

C
2.79 m

D
3.00 m

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Re-Attempt Weekly Quiz Competition

Chemistry Test 69

Result

Chemistry Test 69

Score

-

Rank

-

SHARING IS CARING

Question 1

3

5

2

4

Question 2

LiF < RbF < KF < NaF

RbF < KF < NaF < LiF

LiF > NaF > KF > RbF

LiF < NaF < KF < RbF

Question 3

Two pπ – dπ bonds

One pπ – dπ bonds

Four pπ – dπ bonds

Three pπ – dπ bonds

Question 4

280 kJ mol–1

285 kJ mol–1

270 kJ mol–1

15 kJ mol–1

Question 5

Nitrobenzene

Pyridine

Alanine

Diazomethane

Question 6

It is effective in relieving pain

It is a neurologically active drug

It has antiblood clotting action

It belongs to narcotic analgesics

Question 7

2.60 m

2.18 m

2.79 m

3.00 m

User

Question Analysis

My Perfomance

Score

-

Rank

-

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280 kJ mol^–1

285 kJ mol^–1

270 kJ mol^–1

15 kJ mol^–1