Some Basic Concepts of Chemistry Test

Result

Some Basic Concepts of Chemistry Test - 6

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Weekly Quiz Competition

Question 1
4 / -1

A molar solution is one that contains one mole of a solute in

A
1000 g of the solvent

B
One litre of the solvent

C
One litre of the solution

D
22.4 litres of the solution
Question 2
4 / -1

1 mol of CH₄ contains

A
6.02 × 10²³ atoms of H

B
4 g atoms of hydrogen

C
1.81 × 10²³ molecules of CH₄

D
3.0 g of carbon
Question 3
4 / -1

The density of gas A is three times that of gas B. If the molecular weight of A is M, the molecular weight of B is

A
3 M

B

C
M/3

D

Solution
Question 4
4 / -1

Which of the following has smallest number of molecules?

A
0.1 mol of CO₂ gas

B
11.2 L of CO₂ gas at N.T.P

C
22g of CO₂ gas

D
22.4 × 10³ ml of CO₂ gas

Solution
Question 5
4 / -1

The equivalent weight of an element is 4. Its chloride has a V.D. 59.25. Then the valency of the element is

A
4

B
3

C
2

D
1

Solution
Question 6
4 / -1

1 c.c. of N₂O at NTP contains :

A

B

C

D
all the above

Solution
Question 7
4 / -1

A metal oxide has the formula Z₂O₃. It can be reduced by hydrogen to give free metal and water. 0.1596 g of the metal oxide requires 6 mg of hydrogen for complete reduction. The atomic weight of the metal is

A
27.9

B
159.6

C
79.8

D
55.8

Solution
Question 8
4 / -1

Ratio of C_p and C_v of a gas ‘X’ is 1.4. The number of atoms of the gas ‘X’ present in 11.2 litres of it at NTP will be :

A

B

C

D

Solution
Question 9
4 / -1

What is the weight of oxygen required for the complete combustion of 2.8 kg of ethylene ?

A
2.8 kg

B
6.4 kg

C
9.6 kg

D
96 kg

Solution
Question 10
4 / -1

A
10 gm molecules

B
5 gm molecules

C
1 gm molecules

D
0.5 gm molecules

Solution