Class 8 Metals and Non Metals Short Answer Questions

Class 8 Metals and Non Metals Short Answer Questions 1. Name two soft metals which can be cut with a knife.
2. Which non-metal is essential for our life and all living beings inhale it during breathing?
3. Name two major non-metals which are present in fertilisers and enhance the growth of plants.
4. Which non-metal is used to disinfect water?
5. Why are bells made of metals?
6. Which liquid metal is used for making thermometers?
7.Some of the following statements are incorrect. Find the incorrect statements and correct them.
(a) The property of metals by virtue of which they can be drawn into wires is called ductility.
(b) Metals are good conductor of electricity but poor conductor of heat.
(c) Articles made of metals produce ringing sound when struck hard.
(d) Oxides of non-metals and metals are acidic in nature.
(e) A less reactive metal replaces a more reactive metal from its salt solution in water
8.Name the following
a)Non metal which is a good conductor of electricity
b)Non metal which is lustrous
C)Metal with highest melting point
d)Most reactive Metal
e)Which gas is released when metal reacts with acid
9.Name the non metal which is added to common salt
10.State whether the following statements are true or false :-
a. Metals form neutral oxides when react with oxyge n.
b. Solution of MgO in water turns red litmus paper to blue.
c. Rust is an oxide of iron.
d. Zinc reacts with water but copper reacts only wi th steam.
e. Zinc replaces copper from the copper sulphate so lution.
11.Fill in the blanks :-
a. Non metals are generally ______, so they break i nto pieces on hammering.
b. Sodium and ______ are soft enough to be cut with a knife.
c. Strings of musical instruments are made up of a ______ .
d. ______ is the only non metal which is a good con ductor of heat and electricity.
e. Metals oxides are ______ in nature because their solution in water turns red litmus blue.
12.Fill in the blanks :-
a. A pencil lead is made up of a non metal called _ _____ .
b. Non metal do not make a ______ sound when struck .
c. Non metals are ______ conductors of electricity.
d. Non metals are not good conductors of heat hence also called as ______ .
e. Bromine is the only non metal which is ______ at room temperature.