Some Basic Concepts of Chemistry Test

Result

Some Basic Concepts of Chemistry Test - 2

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Weekly Quiz Competition

Question 1
4 / -1

A
10.8

B
10.2

C
11.2

D
10.0

Solution
Question 2
4 / -1

The number of oxygen atoms in 4.4 g of CO₂ is

A
1.2 × 10²³

B
6 × 10²²

C
6 × 10²³

D
12 × 10²³
Question 3
4 / -1

The number of gram molecules of oxygen in 6.02 × 10²⁴ CO molecules is

A
10 g molecules

B
5 g molecules

C
1 g molecules

D
0.5 g molecules

Solution
Question 4
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 5
4 / -1

The normality of 0.3M phosphorous acid is

A
0.1

B
0.9

C
0.3

D
0.6

Solution
Question 6
4 / -1

At S.T.P. the density of CCl₄ vapours in g/L will be nearest to :

A
6.87

B
3.42

C
10.26

D
4.57

Solution
Question 7
4 / -1

An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be :

A
CH₃O

B
CH₂O

C
CHO

D
CH₄O
Question 8
4 / -1

In which of the following pairs percent composition of element is not same ?

A
benzene and ethyne

B
But - 2 - ene and Cyclobutane

C
glucose and fructose

D
phenol and ethanol
Question 9
4 / -1

What weight of CuO will be required to provide 200Kg copper

A
200Kg

B
79.5Kg

C
250Kg

D
100Kg
Question 10
4 / -1

Impure sample of ZnS contains 42.34% Zn. What is the percentage of pure ZnS in the sample ?

A
67%

B
63%

C
58%

D
37%