MEDIUM
10th CBSE
IMPORTANT
Earn 100
If a strip of aluminium with scratched surface is dipped in an aqueous solution of copper sulphate for little time, the surface of the strip becomes brownish. What is the reason for this? Write the balanced chemical equation for the reaction.
Important Questions on Metals and Non-Metals
EASY
10th CBSE
IMPORTANT
Write balanced chemical equation for the reaction taking place when zinc carbonate is calcinated.
MEDIUM
10th CBSE
IMPORTANT
Write balanced chemical equation for the reaction taking place when zinc sulphide is roasted or heated in air.
MEDIUM
10th CBSE
IMPORTANT
Write balanced chemical equation for the reaction taking place when zinc oxide is reduced to zinc.
MEDIUM
10th CBSE
IMPORTANT
An element 'X' burns in oxygen to form an electrovalent compound . State the compounds you expect it will form if the element X is made to combine with (i) chlorine and (ii) sulphur. Mention the chemical formula and nature of bond present in each case.
MEDIUM
10th CBSE
IMPORTANT
A metal E is stored under kerosene. When a small piece of it is left open in air, it catches fire. When the product formed is dissolved in water, it turns red litmus to blue. Name the metal.
MEDIUM
10th CBSE
IMPORTANT
A metal E is stored under kerosene. When a small piece of it is left open in air, it catches fire. When the product formed is dissolved in water, it turns red litmus to blue. Write the chemical equation for the reaction when it is exposed to air and when the product is dissolved in water.
HARD
10th CBSE
IMPORTANT
A metal E is stored under kerosene. When a small piece of it is left open in air, it catches fire. When the product formed is dissolved in water, it turns red litmus to blue. Explain the process by which the metal E is obtained from its molten chloride.
HARD
10th CBSE
IMPORTANT
Write the names and symbols of two most reactive metals. Explain by drawing electronic structure how any one of the two metals reacts with a halogen. State any four physical properties of the compound formed.
