Page 259 - Chemistry ICSE Class X
P. 259
Study of Compounds–Nitric Acid 245
(e) Write equations for the following reactions:
(i) X and concentrated sulphuric acid (below 200°C). One equation only for either of the cations given in
Inference 2.
(ii) Action of heat on Y.
(f) Concentrated nitric acid is added to copper-turnings kept in a beaker.
12. Complete the following equations:
below 200°C
(a) KNO (s) + H SO (l) o ___________
3
2
4
conc.
Pt
(b) NH (g) + O (g) o ___________
3
2
800°C
(c) KI(aq) + HNO o ___________
3
conc.
(d) Cu + HNO o ___________
3
dilute
(e) Fe(OH) 2 + HNO o ___________
3
(f) Pb + HNO o ___________
3
conc.
(g) NH 3 + CO o ___________
2
13. Tick (9) the correct answer.
(i) Nitric acid decomposes to give nitrogen dioxide and oxygen at
(a) 200°C
(b) below 200°C
(c) above 200°C
(d) it does not decompose
(ii) Aqua-regia is
(a) conc. HCl + conc. HNO (1 : 3)
3
(b) conc. HCl + conc. HNO (3 : 1)
3
(c) conc. HCl + conc. HNO (1 : 2)
3
(d) conc. HCl + conc. HNO (1 : 1)
3
(iii) The catalyst used in the Ostwald’s process for the manufacture of nitric acid is
(a) iron
(b) palladium
(c) platinum
(d) nickel
(iv) The maximum concentration of nitric acid that could be obtained by distillation is about
(a) 98%
(b) 50%
(c) 100%
(d) 68%
(v) Which of the following is produced when dilute nitric acid is reacted with H S?
2
(a) NO
(b) N O
2
(c) NO
2
(d) N O
5
2
