Question

1:Multiple choice questions:

1) MCL is the formula of chloride of a metal M.the formula of sulphate of the metal is

a) MSO4

b) M2SO4

c) M(SO4)2

2) Symbols W and Ga stands for

a) Tungsten and gallium

b) Vanadium and oxygen

c) Gallium and sodium

3) Water contains ___atoms of hydrogen

a) 1

b) 2

c) 3

4) Valency of silver

a) +2

b) +1

c) +3

5) Which of the following chemical equations are endothermic?

a) NaoH+HCL->Nacl+H2O

b) KOH+HCNKCN

c) 2C+H2 C2H2

6) The majority of chemical reactions are usually accompanied by:

a) Absorption of light

b) Either absorption or liberation of energy

c) Liberation of heat only

7) A chemical change is one in which

a) Only 1 substance is formed

b) One or more different substance are formed

c) None of these

8) Melting of wax is a ---------change

a) Chemical

b) Physical

c) None of these

9) Evolution of heat are called

a) Exothermic reaction

b) Endothermic reaction

c) Electro chemical reaction


10)Formula of zinc sulphide

a) ZNS

b) ZHC

c) ZNSO4​

Answer 1

Answer:

2. A. ,7.B. ,

Explanation:

10. C. ,8. A. ,