Mole Concept Quiz 1 – Punjab Meritorious School Preparation Portal

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Name

Email

School Name with City

Phone Number

The number of significant figures for the three numbers 161 cm, 0.161 cm, 0.0161 cm are

3, 4 and 5 respectively

3, 4 and 4 respectively

3, 3 and 4 respectively

3, 3 and 3 respectively

Irrespective of the source, pure sample, of water always yields 88.89 % mass of oxygen and 11.11 % mass of hydrogen. This is explained by the law of

conservation of mass

multiple proportions

constant composition

constant volume

Two samples of lead oxide were separately reduced to metallic lead by heating in a current of hydrogen. The weight of lead from one oxide was half the weight of lead obtained from the other oxide. The data illustrates

law of reciprocal proportions

law of constant proportions

law of multiple proportions

law of equivalent proportions

giga

kilo

exa

nano

The prefix zepto stands for (in m)

The prefix zepto stands for (in m)

The prefix zepto stands for (in m)

The prefix zepto stands for (in m)

The prefix zepto stands for (in m)

Which of the following is the best example of law of conservation of mass?

Which of the following is the best example of law of conservation of mass?

Which of the following is the best example of law of conservation of mass?

Which of the following is the best example of law of conservation of mass?

Which of the following is the best example of law of conservation of mass?

A sample was weighted using two different balances. The results were

(i) 3.929 g (ii) 4.0 g.

How would the weight of the sample be reported?

3.93 g

3g

3.9 g

3.929 g

Which one of the following pairs of compounds illustrate the law of multiple proportions?

Which one of the following pairs of compounds illustrate the law of multiple proportions?

Which one of the following pairs of compounds illustrate the law of multiple proportions?

Which one of the following pairs of compounds illustrate the law of multiple proportions?

Which one of the following pairs of compounds illustrate the law of multiple proportions?

1

2

3

4

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