Page 105 - Chemistry ICSE Class X

Study of Acids, Bases and Salts 91

Questions from Board Papers

Q 1. Select the correct answer from the choices A, B, C, and D which are given. Write only the letter corresponding to
the correct answer. [ICSE 2010]
(i) A particular solution contains molecules and ions of the solute so it is a:
(A) Weak acid (B) Strong acid
(C) Strong base (D) Salt solution
(ii) An example of a complex salt is:
(A) Zinc sulphate (B) Sodium hydrogen sulphate
(C) Iron(II) ammonium sulphate (D) Tetraammine copper(II) sulphate
(iii) Aqua-regia is a mixture of
(A) Dilute hydrochloric acid and concentrated nitric acid
(B) Concentrated hydrochloric acid and dilute nitric acid
(C) Concentrated hydrochloric acid [1 part] and concentrated nitric acid [3 parts]
(D) Concentrated hydrochloric acid [3 parts] and concentrated nitric acid [1 part]
Q 2. Write the equation for the following reactions: [ICSE 2010]
(i) Zinc oxide is treated with sodium hydroxide solution.
(ii) Magnesium sulphate solution is mixed with barium chloride solution.
Q 3. Give the equations for the following conversions A to E. [ICSE 2010]

Q 4. Solution A is a sodium hydroxide solution. Solution B is a weak acid. Solution C is dilute sulphuric acid. Which
solution will [ICSE 2010]
K NKDGTCVG UWNRJWT FKQZKFG HTQO UQFKWO UWNRJKVG!
KK IKXG C YJKVG RTGEKRKVCVG YKVJ \KPE UWNRJCVG UQNWVKQP!
KKK EQPVCKP UQNWVG OQNGEWNGU CPF KQPU!
Q 5. Give equation for the preparation of the following salt from the starting material given: [ICSE 2010]
(i) Iron(III) chloride from Iron
Q 6. The action of heat on the blue crystalline solid L gives a reddish-brown gas M, a gas which relights a glowing
splinter and leaves a black residue. When gas N, which has a rotten-egg smell, is passed through a solution of L,
a black precipitate is formed. [ICSE 2010]
(i) Identify L, M and N (Name or Formula).
(ii) Write equation for the action of heat on L.
(iii) Write equation for the reaction between the solution of L and the gas N.
Q 7. Choose the correct answer from the options given below: [ICSE 2011]
(i) Hydroxide of this metal is soluble in sodium hydroxide solution.
(A) Magnesium (B) Lead (C) Silver (D) Copper
Q 8. Write the balanced chemical equation for each of the following reactions:
(i) Sodium thiosulphate is reacted with dilute hydrochloric acid
(ii) Calcium bicarbonate reacts with dilute hydrochloric acid
(iii) Dilute sulphuric acid is poured over sodium sulphite
(iv) Lead nitrate solution is added to sodium chloride solution
(v) Zinc is heated with sodium hydroxide solution
(vi) Zinc oxide dissolves in sodium hydroxide. [ICSE 2011]

Q 9. 9JCV JCRRGPU VQ VJG ET[UVCNU QH YCUJKPI UQFC YJGP GZRQUGF VQ CKT! 0COG VJG RJGPQOGPQP GZJKDKVGF [ICSE 2011]