Page 104 - Chemistry ICSE Class X
P. 104
90 ICSE Chemistry – 10
11. Tick (9) the correct choice.
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(a) grapes
(b) curd
(c) tomatoes
(d) onions
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(a) dil. sodium hydroxide solution
(b) dil. ammonia solution
(c) limewater
(d) dil. hydrochloric acid
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(a) copper
(b) sodium
(c) magnesium
(d) zinc
(iv) The pH of a pure sample of water at 298 K is always
(a) 7
(b) < 7
(c) > 7
(d) none of these
(v) The process in which a hydrated salt loses its water of crystallisation to the air is called
(a) vaporisation
(b) deliquescence
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(d) sublimation
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.
(a) MgCl 6H O
2
2
.
(b) CaCl 6H O
2
2
.
(c) Na SO 10H O
2
4
2
(d) none of these
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(a) Na SO
4
2
(b) KCl
(c) NaNO
3
(d) Cu(NO )
3 2
(viii) An acid can react with
(a) Na CO
2
3
(b) PbSO
4
(c) Na SO
2
4
(d) AgCl
Answers
(i) (b) (ii) (d) (iii) (a) (iv) (a) (v) (c) (vi) (c) (vii) (d) (viii) (a)
