Q16Multiple choice
Which of the following phenomena occur, when a small amount of acid is added to water? (i) Ionisation (ii) Neutralisation (iii) Dilution (iv) Salt formation
This question refers to a figure in the original PDF.
- (a)(i) and (ii)
- (b)(i) and (iii)
- (c)(ii) and (iii)
- (d)(ii) and (iv) ACIDS, BASES AND SALTS 11 :KLFKRQHRIWKHIROORZLQJFDQEHXVHGDVDQDFLGăEDVHLQGLFDWRU E\DYLVXDOO\LPSDUHGVWXGHQW" D /LWPXV E 7XUPHULF F 9DQLOODHVVHQFH G 3HWXQLDOHDYHV :KLFKRIWKHIROORZLQJVXEVWDQFHZLOOQRWJLYHFDUERQGLR[LGHRQ WUHDWPHQWZLWKGLOXWHDFLG" D 0DUEOH E /LPHVWRQH F %DNLQJVRGD G /LPH :KLFKRIWKHIROORZLQJLVDFLGLFLQQDWXUH" D /LPHMXLFH E +XPDQ EORRG F /LPHZDWHU G $QWDFLG 6 volt battery Bulb ,QDQDWWHPSWWRGHPRQVWUDWHHOHFWULFDOFRQGXFWLYLW\ Switch WKURXJK DQ HOHFWURO\WH WKH IROORZLQJ DSSDUDWXV )LJXUH ZDVVHWXS :KLFK DPRQJ WKH IROORZLQJ VWDWHPHQW V LV DUH Beaker FRUUHFW" L %XOE ZLOO QRW JORZ EHFDXVH HOHFWURO\WH LV QRW Nail DFLGLF Dilute NaOH LL %XOEZLOOJORZEHFDXVH1D2+LVDVWURQJEDVH solution Rubber DQGIXUQLVKHVLRQVIRUFRQGXFWLRQ cork LLL %XOEZLOOQRWJORZEHFDXVHFLUFXLWLVLQFRPSOHWH LY %XOE ZLOO QRW JORZ EHFDXVH LW GHSHQGV XSRQ )LJ WKHW\SHRIHOHFWURO\WLFVROXWLRQ D L DQG LLL E LL DQG LY F LL RQO\ G LY RQO\ :KLFKRIWKHIROORZLQJLVXVHGIRUGLVVROXWLRQRIJROG" D +\GURFKORULFDFLG E 6XOSKXULFDFLG F 1LWULFDFLG G $TXDUHJLD ( ;(03/$5 3 52%/(06 ă 6&,(1&( 22. Which of the following is not a mineral acid? (a) Hydrochloric acid (b) Citric acid (c) Sulphuric acid (d) Nitric acid 23. Which among the following is not a base? (a) NaOH (b) KOH (c) NH4OH (d) C2H5 OH 24. Which of the following statements is not correct? (a) All metal carbonates react with acid to give a salt, water and carbon dioxide (b) All metal oxides react with water to give salt and acid (c) Some metals react with acids to give salt and hydrogen (d) Some non metal oxides react with water to form an acid 25. Match the chemical substances given in Column (A) with their appropriate application given in Column (B) Column (A) Column (B) (A) Bleaching powder (i) Preparation of glass (B) Baking soda (ii) Production of H2 and Cl2 (C) Washing soda (iii) Decolourisation (D) Sodium chloride (iv) Antacid (a) A—(ii), B—(i), C—(iv), D—(iii) (b) A—(iii), B—(ii), C—(iv), D—(i) (c) A—(iii), B—(iv), C—(i), D—(ii) (d) A—(ii), B—(iv), C—(i), D—(iii) 26. Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained? (You may use colour guide given in Figure 2.2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Figure 2.2 ACIDS, BASES AND SALTS 13 (a) Red (b) Yellow (c) Yellowish green (d) Blue 27. Which of the following is(are) true when HCl (g) is passed through water? (i) It does not ionise in the solution as it is a covalent compound. (ii) It ionises in the solution (iii) It gives both hydrogen and hydroxyl ion in the solution (iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule (a) (i) only (b) (iii) only (c) (ii) and (iv) (d) (iii) and (iv) 28. Which of the following statements is true for acids? (a) Bitter and change red litmus to blue (b) Sour and change red litmus to blue (c) Sour and change blue litmus to red (d) Bitter and change blue litmus to red 29. Which of the following are present in a dilute aqueous solution of hydrochloric acid? (a) H3O+ + Cl– (b) H3O+ + OH– (c) Cl– + OH– (d) unionised HCl 30. Identify the correct representation of reaction occurring during chloralkali process (a) 2NaCl(l) + 2H2O(l) → 2NaOH(l) + Cl2(g) + H2(g) (b) 2NaCl(aq) + 2H2O(aq) → 2NaOH(aq) + Cl2(g) + H2(g) (c) 2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(aq) + H2(aq) (d) 2NaCl (aq) + 2H2O (l) → 2NaOH (aq) + Cl2(g) + H2(g) 14 E XEMPLAR P ROBLEMS – SCIENCE
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(b) (i) and (iii)