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प्रश्न
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
विकल्प
Iron
Sodium
Gold
Magnesium
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उत्तर
Sodium
Explanation:
Metals are generally hard. This means that most of the metals cannot be cut easily. But sodium metal is soft and can be easily cut with a knife.
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संबंधित प्रश्न
.................... liberated when acetic acid reacts with sodium metal.
(a) Hydrogen
(b) Chlorine
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(b) More reactive than aluminium
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(c) ZnSO4
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Out of aluminium, copper, calcium and tin, the most reactive metal is:
Which of the following pair of reactants can undergo a displacement reaction under appropriate conditions?
Metal A burns in air, on heating, to form an oxide A2O3 whereas another metal B burns in air only on strong heating to form an oxide BO. The two oxides A2O3 and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.
- What is the nature of oxide A2O3?
- What is the nature of oxide BO?
- Name one metal like A.
- Name one metal like B.
