Chemistry Test

Question 1
4 / -1

Consider the following reaction.

\(\mathrm{BaCl}_{2}+\mathrm{MgSO}_{4} \rightarrow \mathrm{MgCl}_{2}+\mathrm{BaSO}_{4}\)

Which type of reaction is this?

A
Displacement reaction

B
Double displacement reaction

C
Addition reaction

D
Substitution reaction

Question 2
4 / -1

What is the approximate number of molecules in 4.25 g of NH₃?

A
1 x 10²³

B
1.5 x 10²³

C
2 x 10²³

D
6 x 10²³

Question 3
4 / -1

Directions: In the following question, a statement of Assertion is given; followed by a corresponding statement of Reason just below it. Out of the statements mark the correct answer as:

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true, but the reason is not the correct explanation of the assertion.

(c) If assertion is true statement, but reason is false.

(d) If both assertion and reason are false.

Assertion: According to transition state theory, for the formation of an activated complex; one of the vibrational degree of freedom is converted into a translational degree of freedom.

Reason: Energy of the activated complex is higher than the energy of reactant molecules.

A
(a)

B
(b)

C
(c)

D
(d)

Question 4
4 / -1

In case of a buffer solution containing equimolar amount of ammonium hydroxide and ammonium chloride, the reserve basicity of the solution is due to the presence of

A
ammonium hydroxide molecules

B
ammonium ions

C
ammonium chloride molecules

D
chloride ions

Question 5
4 / -1

In which of the following pairs are the two species not isostructural?

A
\(\mathrm{PCl}_{4}{ }^{+}\) and \(\mathrm{SiCl}_{4}\)

B
\(\mathrm{PF}_{5}\) and \(\mathrm{BrF}_{5}\)

C
\(\mathrm{AlF}_{6}{ }^{3-}\) and \(\mathrm{SF}_{6}\)

D
\(\mathrm{CO}_{3}{ }^{2-}\) and \(\mathrm{NO}_{3}\)

Question 6
4 / -1

If the concentration of [Ag⁺] = 10^-5 in a solution, then the concentration of [Cl^-] required for the precipitation of AgCl (Ksp = 2 10^-12) is

A
10^-5

B
2 x 10^-7

C
10^-8

D
10^-9

Question 7
4 / -1

The total number of electrons in a molecule of CO₂ is

A
44

B
22

C
12

D
6

Question 8
4 / -1

In which of the following ionisation processes has the bond order increased and the magnetic behaviour remains unchanged?

A
O₂ → O₂⁺

B
N₂ → N₂⁺

C
C₂ → C₂⁺

D
None of these

Question 9
4 / -1

If 18 g of glucose is added to 178.2 g of water, then the vapour pressure of water for this aqueous solution at 100^oC is

A
759.00 torr

B
7.60 torr

C
76.00 torr

D
752.40 torr

Question 10
4 / -1

When 10^-6 mole of a mono basic strong acid is dissolved in 1 litre of the solvent, its pH is

A
6

B
7

C
5

D
4

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Chemistry Test ...

Question 1

Displacement reaction

Double displacement reaction

Addition reaction

Substitution reaction

Question 2

1 x 1023

1.5 x 1023

2 x 1023

6 x 1023

Question 3

(a)

(b)

(c)

(d)

Question 4

ammonium hydroxide molecules

ammonium ions

ammonium chloride molecules

chloride ions

Question 5

\(\mathrm{PCl}_{4}{ }^{+}\) and \(\mathrm{SiCl}_{4}\)

\(\mathrm{PF}_{5}\) and \(\mathrm{BrF}_{5}\)

\(\mathrm{AlF}_{6}{ }^{3-}\) and \(\mathrm{SF}_{6}\)

\(\mathrm{CO}_{3}{ }^{2-}\) and \(\mathrm{NO}_{3}\)

Question 6

10-5

2 x 10-7

10-8

10-9

Question 7

44

22

12

6

Question 8

O2 → O2+

N2 → N2+

C2 → C2+

None of these

Question 9

759.00 torr

7.60 torr

76.00 torr

752.40 torr

Question 10

6

7

5

4

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Question Analysis

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1 x 10²³

1.5 x 10²³

2 x 10²³

6 x 10²³

10^-5

2 x 10^-7

10^-8

10^-9

O₂ → O₂⁺

N₂ → N₂⁺

C₂ → C₂⁺