MEDIUM
10th CBSE
IMPORTANT
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Write balanced chemical equation for the reaction taking place when zinc sulphide is roasted or heated in air.

Important Questions on Metals and Non-Metals

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 XO. 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.
HARD
10th CBSE
IMPORTANT
Explain the steps for extraction of copper from its sulphide ore. Write the balanced equations involved in the process.
HARD
10th CBSE
IMPORTANT
What is meant by refining of metals? Draw a diagram of electrolytic refining of copper and name the substances used as cathode, anode and the electrolyte.