Which of the following are molecules of compounds?
(I) Carbon dioxide
(II) Chlorine gas
(III) Hydrogen Chloride

All I, II and III

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Both I and III

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Only II

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Only I

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Solution

The correct option is B
Both I and III

 Correct answer is option (c).

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The gases hydrogen, oxygen, carbon dioxide, sulphur dioxide and chlorine are arranged in order of their increasing relative molecular masses. Given 8 g of each gas at STP, which gas will contain the least number of molecules and which gas the most?

Q. Question 32
Which of the following are not compounds?
(a) Chlorine gas
(b) Potassium chloride
(c) Iron
(d) Iron sulphide
(e) Aluminium
(f) Iodine
(g) Carbon
(h) Carbon monoxide
(i) Sulphur powder

Q. Which of the following are not compounds ?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond

Q. Which of the following represents a correct chemical reaction?
(a) nitrogen + oxygen ⟶ hydrogen oxide
(b) carbon + chlorine ⟶ potassium chloride
(c) sulphur + oxide ⟶ sulphur dioxide
(d) sodium + chlorine ⟶ magnesium chloride

Q. Which of the following are molecules of compounds?
I) Carbon dioxide
II) Chlorine
III) Hydrogen chloride

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Which of the following are molecules of compounds? (I) Carbon dioxide (II) Chlorine gas (III) Hydrogen Chloride

The correct option is B Both I and III  Correct answer is option (c).

Which of the following are molecules of compounds?
(I) Carbon dioxide
(II) Chlorine gas
(III) Hydrogen Chloride

The correct option is B
Both I and III

 Correct answer is option (c).