MCQ Questions

Question No. 1

Fill in the blanks

Answer :

(a) Physical state of Bromine is __________.

(b) Physical state of Bromine is __________.

(c) Proton is a __________ charged particle.

(d) Ca is the symbol of __________.

(e) Symbol of gold is _____________.

Question No. 2

State True or False

Answer :

(b) Helium is an example of noble gas.

(c) Molecules are never monoatomic

(d) Atoms are the building blocks of all matter.

(a) In a compound, constituents are present in definite proportion by mass

(e) An ion carries positive or negative charge.

Question No. 3

Match the following:

Answer :

Question No. 4

Very short answer type questions

Answer :

(a) . What is an atom?

(d) What do you mean by valency?

(b) What is a molecule?

(c) What is a chemical formula?

(e) what is atomicity?

Question No. 5

Short answer type questions

Answer :

(a) Write two examples of diatomic molecules

(c) Write two examples of metallic oxide

(b) Write two differences between elements and compounds.

(d) Write the postulates of Dalton’s atomic theory.

(e) Write the characteristics of a molecule.

Question No. 6

Long answer type questions

Answer :

(1) Write the formula of: (i) Ammonia (ii) Glucose (iii) Methane

(2) Write the names of the following: (i) NaOH (ii) NH4 OH (iii) LiCO3

(3) Write definitions of the following: (i) Electron (ii) Proton (iii) Neutron

(4) Write the cation and anion present in the following compounds. (i) CH3 COONa (ii) NaCl (iii) K2 SO4

Question No. 7

Two or more than two different elements that are bounded together is called

Answer :

a element

compound

mixture

solution

Question No. 8

Chalk consists of-

Answer :

calcium

carbon dioxide

oxygen

all of them

Question No. 9

Carbon, hydrogen and oxygen combine together to make-

Answer :

sugar

polythene

chalk

common salt

Question No. 10

Cu is symbol of

Answer :

copper

cobalt

curium

carbon

Question No. 11

Common name of sodium bicarbonate is_________

Answer :

washing soda

caustic soda

lime soda

baking soda

Question No. 12

Charge of electron is ____________

Answer :

–1.602 × 10^–19C

2.6 × 10^–20C

Zero

+1.602 × 10^–19C

Chapter

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