Question 1
Metals and Non-metals · 2024
What happens when calcium reacts with water?
Correct!
The answer is B, A less violent reaction occurs and hydrogen bubbles can stick to the calcium.
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Metals and Non-metals questions for CBSE X
Lakshyank has 65 Metals and Non-metals questions for CBSE X. Try a few below, then practise the rest free.
Question 2
Metals and Non-metals
Which are amphoteric among Na₂O,ZnO,Al₂O₃,CO₂,H₂O?
Correct!
The answer is B, ZnO and Al₂O₃.
Question 3
Metals and Non-metals
Why is a sulphide ore often converted to an oxide before extraction?
Correct!
The answer is B, Many metal oxides are easier to reduce to the metal than their sulphides.
Question 4
Metals and Non-metals
Which equations show zinc-ore conversion and reduction?
Correct!
The answer is C, 2ZnS+3O₂→2ZnO+2SO₂;ZnCO₃→ZnO+CO₂;ZnO+C→Zn+CO.
Question 5
Metals and Non-metals
How does extraction of highly reactive metals differ from extraction of many middle-reactivity metals?
Correct!
The answer is D, Highly reactive metals often need electrolysis of molten compounds; many middle-reactivity metal oxides can be chemically reduced.
Question 6
Metals and Non-metals
What is the green corrosion coating on copper commonly described as?
Correct!
The answer is B, Basic copper carbonate, CuCO₃·Cu(OH)₂.
Question 7
Metals and Non-metals
How is ionic KCl formed from potassium and chlorine atoms?
Correct!
The answer is D, Potassium transfers one electron to chlorine, producing K⁺ and Cl⁻.
Question 8
Metals and Non-metals
How does extraction of highly reactive metals differ from extraction of many middle-reactivity metals?
Correct!
The answer is D, Highly reactive metals often need electrolysis of molten compounds; many middle-reactivity metal oxides can be chemically reduced.
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