Page 107 - Chemistry ICSE Class X

Study of Acids, Bases and Salts 93
Q 19. Fill in the blanks from the choices given within brackets: [ICSE 2014]

(i) The basicity of acetic acid is __________ (3, 1, 4)
(ii) Quicklime is not used to dry HCl gas because __________ (CaO is alkaline, CaO is acidic, CaO is neutral)
Q 20. Draw the structure of the stable positive ion formed when an acid dissolves in water. [ICSE 2014]
Q 21. State the inference drawn from the following observation: [ICSE 2014]
R* QH NKSWKF 4 KU 9JCV MKPF QH UWDUVCPEG KU 4!
Q 22. State one relevant observation when crystals of copper nitrate are heated in a test tube. [ICSE 2015]

Q 23. Identify the acid which matches the following description (i) to (v): [ICSE 2015]
(i) The acid which is used in the preparation of a non-volatile acid.
(ii) The acid which produces sugar charcoal from sugar.
(iii) The acid which is prepared by catalytic oxidation of ammonia.

(iv) The acid on mixing with lead nitrate solution produces a white precipitate which is insoluble even on heating.
(v) The acid on mixing with silver nitrate solution produces a white precipitate which is soluble in excess
ammonium hydroxide.

Q 24. %JQQUG VJG OQUV CRRTQRTKCVG CPUYGT HTQO VJG HQNNQYKPI NKUV QH QZKFGU YJKEJ ſV VJG FGUETKRVKQP 'CEJ CPUYGT OC[
be used only once: [ICSE 2015]
(SO , SiO , Al O , MgO, CO, Na O)
3
2
2
2
2
(i) A basic oxide.
(ii) An oxide which dissolves in water forming an acid.
(iii) An amphoteric oxide.
(iv) A covalent oxide of a metalloid.
Q 25. (TQO VJG NKUV QH VJG HQNNQYKPI UCNVU EJQQUG VJG UCNV VJCV OQUV CRRTQRTKCVGN[ ſVU VJG FGUETKRVKQP IKXGP KP VJG
following: [ICSE 2015]
[AgCl, MgCl , NaHSO , PbCO , ZnCO , KNO , Ca(NO ) ]
3 2
3
3
4
2
3
(i) A deliquescent salt.
(ii) An insoluble chloride.
(iii) On heating, this salt gives a yellow residue when hot and white when cold.
(iv) On heating this salt, a brown coloured gas is evolved.
Q 26. Fill in the blank with the choices given in brackets. [ICSE 2016]
(i) Higher the pH value of a solution, the more __________ (acidic/alkaline) it is.

Q 27. State your observations when: [ICSE 2016]
(i) Barium chloride solution is mixed with sodium sulphate solution.
Q 28. Match the salts given in Column I with their method of preparation given in Column II: [ICSE 2016]

Column I Column II
(i) Pb(NO ) from PbO (A) Simple displacement
3 2
(ii) MgCl from Mg (B) Titration
2
(iii) FeCl from Fe (C) Neutralization
3
(iv) NaNO from NaOH (D) Precipitation
3
(v) ZnCO from ZnSO 4 (E) Combination
3