v. Carbon dioxide gas and sulphur dioxide gas

Choose the most appropriate answer from the following options:

i. Among the period 2 elements, the element which has high electron affinity is
A. Lithium
B. Carbon
C. Chlorine
D. Fluorine

ii. Among the following compounds, identify the compound which has all three bonds
(ionic, covalent and coordinate bond).
A. Ammonia
B. Ammonium chloride
C. Sodium hydroxide
D. Calcium chloride

iii. Identify the statement which is incorrect about alkanes:
A. They are hydrocarbons.
B. There is a single covalent bond between carbon and hydrogen.
C. They can undergo both substitution as well as addition reactions.
D. On complete combustion, they produce dioxide and water.

iv. Which of these will act as a non-electrolyte?
A. Liquid carbon tetrachloride
B. Acetic acid
C. Sodium hydroxide aqueous solution acid
D. Potassium chloride aqueous solution

ix. Which of the following is not a typical property of an ionic compound?
A. High melting point.
B. Conducts electricity in the molten and in the aqueous solution state.
C. They are insoluble in water.
D. They exist as oppositely charged ions even in the solid state.

v. Which one of the following will not produce an acid when made to react with water?
A. Carbon monoxide
B. Carbon dioxide
C. Nitrogen dioxide
D. Sulphur trioxide

vi. Identify the metallic oxide which is amphoteric in nature:
A. Calcium oxide
B. Barium oxide
C. Zinc oxide
D. Copper (II) oxide

vii. In the given equation, identify the role played by concentrated sulphuric acid:
$$\ce{S + 2H2SO4 -> 3SO2 + 2H2O}$$
A. Non-volatile acid
B. Oxidising agent
C. Dehydrating agent
D. None of the above

viii. Nitrogen gas can be obtained by heating:
A. Ammonium nitrate
B. Ammonium nitrite
C. Magnesium nitride
D. None of the above

x. The metals zinc and tin are present in the alloy:
A. Solder
B. Brass
C. Bronze
D. Duralumin

Solve the following:

i. What volume of oxygen is required to burn completely ``\pu{90 dm^3 }`` of butane under
similar conditions of temperature and pressure?
$$\ce{ 2 C4H10 + 13 O2 -> 8CO2 + 13 H2O }$$

ii. The vapour density of a gas is 8. What would be the volume occupied by ``\pu{24 g }`` of the
gas at STP?