Class 9 Chemistry MCQ Chapter 1

The branch of chemistry which deals with qualitative & quantitative analysis of matter is :

Analytical

Nuclear

Biochemistry

Organic

The empirical formula of glucose is

CHO

CH2O

C2HO

CHO2

Which of the following can be separated by physical means?

Mixture

Element

Compound

Radical

Polyatomic molecules consist of _________ atoms.

1

More than 1

Less than 1

2

The formula of benzene is _________

C6H6O3

C6H6

C12H22

Nil

Which one of the following pair has the same mass?

1 mole of CO and 1 mole of N2

1 mole of CO and 1 mole of CO2

1 mole of O2 and 1 mole of N2

1 mole of O2 and 1 mole of CO2

How many numbers of moles are equivalent to 8 grams of CO2?

0.15

0.18

0.21

0.24

Which one is largest?

Exo

Peta

Atto

Pico

The value of Avogadro ‘no is:

6.023×1024

6.023×1026

6.023×1023

6.023×1020

A _________ is a pure substance is made up of two or more elements.

Mixture

Elements

Solution

Compound