Chemistry - Mock Test 42

Question 411

The lightest and simpliest atom is?

A) Oxygen B) Hydrogen C) Nitrogen D) Carbon dioxide

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Question 412

Amalgam is a mixture of metal with?

A) Mercury B) Gold C) Iron D) None of these

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Question 413

When candle burns the produced gasous products are?

A) Carbon dioxide and Water vapour B) Oxygen and Water vapour C) Oxygen and Carbon dioxide D) None of these

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Question 414

Malachite is an ore of?

A) Iron B) Copper C) Silver D) None of these

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Question 415

The wire used in a fuse has?

A) Low resistance B) Low resistance and High melting point C) High resistance and Low melting point D) None of these

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Question 416

In Leclanche cell?

A) Electric energy is converted into chemical energy B) Chemical energy is converted into electric energy C) Heat energy is converted into electric energy D) None of these

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Question 417

Which is the allotrope of carbon?

A) Diamond B) Gold C) Silver D) Copper

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Question 418

Bleaching powder is produced from?

A) Calcium and Oxygen B) Sodium, Hydrogen and Oxygen C) Calcium, Oxygen and Chlorine D) None of these

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Question 419

CuSO4.5H2O is the chemical formula of?

A) Caustic soda B) Washing soda C) Blue vitriol. D) Ammonium Sulphate.

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Question 420

When two carbon atoms share two electron pairs then they form?

A) single bond B) double bond C) triple bond D) coordinate covalent bond

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