Question

One of the oxides of sulphur is sulphur dioxide. The molecular formula of sulphur dioxide is so2. It is produced by the burning of fossil fuels contaminated with sulphur compounds. It is a toxic gas and its odour is similar to that of burnt matches. It is a colourless pungent smelling gas and is a major air pollutant.
(i) What is the electronic configuration of its constituent elements?
(a) S=2, 8, 6 (b) S=2,12,2 (c) S=2,6,6,2 (d)S=2, 6, 8
0=2,6 0=2,4,2 0=2,6 0=2,6
(ii) Sulphur and oxygen are
(a) Isobars
(b) Isotopes
(c)Both (a) and (b)
(d) Neither isobars nor isotopes
(iii) Match the following
A. Valency of S (i) 32
B. Valency of O (ii) 16
C. Mass number of S (iii) 2
D. Mass number of O (iv) 2
(iv) Which statement is incorrect?
(a) Hydrogen and lithium have valency of 1.
(b) Magnesium and calcium have valency of 2.
(c) Boron and aluminium, they have valency of 3.
(d) None of above.
(v) Valency is the combining_____________ an element.
(a) Repulsion (c) Capacity
(b) Attraction (d) Deficiency

Answer 1

Answer:

i-a

ii-d

iii- A-iii

B-iv

C-i

D-ii

iv-d

v-c