Chemistry Test 8

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Chemistry Test 8

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following is an example of paramagnetic solid?

A
NaCl

B
KF

C
TiO₂

D
CuO

Solution

Paramagnetism is due to presence of one or more unpaired electrons which are attracted by magnetic field. E.g. O², Cu²⁺, Fe³⁺, Cr³⁺
In CuO there is unpaired electrons.
Question 2
4 / -1

The measurable properties of the gases are

A
mass

B
Volume

C
Pressure

D
All of these

Solution

Mass, volume, pressure all are the measurable properties of the gases.
The characteristics of gases are described fully in terms of four parameters or measurable properties:
(i) The volume, V, of the gas.
(ii) Its pressure, P
(iii) Its temperature, T
(iv) The amount of the gas (i.e., mass or number of moles).
Hence, option D is correct.
Question 3
4 / -1

The temperature at which real gases obey the ideal gas laws over a wide range of pressure is called

A
Critical temperature

B
Boyle temperature

C
Inversion temperature

D
Reduced temperature

Solution

The temperature at which real gases obey the ideal gas laws over a wide range of pressure is called Boyle temperature.
Hence, option B is correct.
Question 4
4 / -1

The quantities of products in a reaction at equilibrium is increased if an inert gas is added under the condition of

A
constant volume provided Δv_g (change in the gaseous species) of the reaction is positive.

B
constant pressure provided Δv_g of the reaction is positive

C
constant volume provided Δv_g of the reaction is negative

D
constant pressure provided Δv_g of the reaction is negative.

Solution

The addition of inert gas at constant volume does not affect the equilibrium position. The addition at constant pressure causes the increase in volume and thus the equilibrium shifts towards larger number of gaseous molecules. Δv_g is positive if v_g(products)
> v_g(reactants) thus the equilibrium will shifts to product side.
Hence, option B is correct.
Question 5
4 / -1

Which of the following solutions has the maximum pH value?

A
0.2 M HNO₃

B
0.2 M HCl

C
0.2 M CH₃COOH

D
0.2 M CH₃COONa

Solution

Sodium acetale solution is alkaline and thus has maximum pH.
Hence, option D is correct.

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Re-Attempt Weekly Quiz Competition

Chemistry Test 8

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Chemistry Test 8

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Question 1

NaCl

KF

TiO2

CuO

Solution

Question 2

mass

Volume

Pressure

All of these

Solution

Question 3

Critical temperature

Boyle temperature

Inversion temperature

Reduced temperature

Solution

Question 4

constant volume provided Δvg (change in the gaseous species) of the reaction is positive.

constant pressure provided Δvg of the reaction is positive

constant volume provided Δvg of the reaction is negative

constant pressure provided Δvg of the reaction is negative.

Solution

Question 5

0.2 M HNO3

0.2 M HCl

0.2 M CH3COOH

0.2 M CH3COONa

Solution

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TiO₂

constant volume provided Δv_g (change in the gaseous species) of the reaction is positive.

constant pressure provided Δv_g of the reaction is positive

constant volume provided Δv_g of the reaction is negative

constant pressure provided Δv_g of the reaction is negative.

0.2 M HNO₃

0.2 M CH₃COOH

0.2 M CH₃COONa