metals and non metals

Question 1

what is the green material

Answer 1

a mixture of copper hydroxide

Question 2

what is oxide of magnesium

Answer 2

that the red
litmus turns blue. So, oxide of magnesium
is also basic in nature

Question 3

product formed in

the reaction of sulphur and oxygen is

Answer 3

sulphur dioxide gas.

Question 4

When sulphur
dioxide is dissolved in water sulphurous
acid is formed. The reaction can be given

Answer 4

Sulphur dioxide (SO2) + Water (H2O) ®
Sulphurous acid (H2SO3)

Question 5

what turns blue litmus paper to red

Answer 5

sulphurous acid

Question 6

oxides of

non-metals are .

Answer 6

acidic in nature

Question 7

Sodium metal

Answer 7

reacts vigorously with oxygen

Question 8

sodium metal is stored in

Answer 8

in kerosene.

Question 9

non metals that react with air

Answer 9

phosphorus

Question 10

non metal that catches fire when reacted with air

Answer 10

phosphorus

Question 11

phosphorous is store in

Answer 11

water.

Question 12

What does the ‘pop’ sound indicate?

Answer 12

presence of hydrogen gas.

Question 13

Metals react with sodium hydroxide to produce

Answer 13

hydrogen gas.

Question 14

Reactions of non-metals with bases are

Answer 14

complex

Question 15

metal displaces another metal from its

compound in

Answer 15

aqueous solution

Question 16

zinc is more reactive than

Answer 16

than copper and iron

Question 17

purple
coloured solution which is applied
on wounds as an

Answer 17

antiseptic,

Question 18

1. Which of the following can be beaten into thin sheets?

Answer 18

Zinc

Question 19

Phosphorus is a very

Answer 19

reactive non-metal.

Question 20

Metals are conductors of heat and

Answer 20

electricity

Question 21

what is the best conductor of heat and electricity.

Answer 21

Silver

Question 22

(c) Iron is______reactive than copper.

Answer 22

Copper is less reactive than iron

Question 23

(d) Metals react with acids_____ to produce gas.

Answer 23

hydrogen gas