Science exemplar problems class 10 Solutions for Chapter 3 metals and non metals

Exercises in Chapter 3 metals and non metals Grade 10

Metals and Non-metals - Exercise

Questions in Metals and Non-metals - Exercise

Which of the following non-metals exist in liquid state at room temperature?

What happens when calcium is treated with water?

(i) It does not react with water

(ii) It reacts violently with water

(iii) It reacts less violently with water

(iv) Bubbles of hydrogen gas formed stick to the surface of calcium

Which of the following metals form an amphoteric oxide?

Generally, non-metals are not lustrous. Which of the following non-metal is lustrous?

Which of the following properties is NOT exhibited by ionic compounds?

Which of the following non-metal is an exception which can conduct electricity?

What happens when calcium is treated with water?

(i) It does not react with water

(ii) It reacts violently with water

(iii) It reacts less violently with water

(iv) Bubbles of hydrogen gas formed stick to the surface of calcium

State whether TRUE or FALSE.

When metals are treated with acids, hydrogen gas is liberated.

Which of the following option is used with aluminium in joining the railway tracks?

What are minerals?

State whether the given statement is TRUE or FALSE.

Calcination involves heating a carbonate-containing ore at a high temperature in the presence of limited air to produce metal oxide.

Chemical decomposition in the presence of electric current is called as ________________ (electrolysis/calcination)

State whether the given statement is TRUE or FALSE.

Calcination involves heating a carbonate-containing ore at a high temperature in the presence of limited air to produce metal oxide.

The metal reacts with moisture or air to produce the metal oxide which deteriorate the quality of metal. This is called _______________ (corrosion/galvanisation)

State whether the given statement is TRUE or FALSE.

Gangue is the impurity present in the ore.

Which of the following is an ore of mercury?

State whether the given statement is TRUE or FALSE.

A natural rock containing one or more minerals is called ore.

A non-metal 'X' is a major constituent of our food and forms two oxides 'Y' and 'Z'. Oxide 'Y' is toxic and causes suffocation whereas Z causes global warming.

Identify X, Y and Z.

Which of the following chemical equations represent the chemical reaction of roasting of zinc ore?

An unknown element forms an oxide that is acidic in nature. The unknown element is ________________ (metal/non-metal)

A solution of Copper sulphate was kept in an iron pot. After few days the iron pot was found to have a number of holes in it. Which of the following is the correct reason behind this?