Objective Type Questions
Objective Type Questions
1)Lemon juice contains
(a) tartaric acid (b) ascorbic acid
(c) acetic acid (d) lactic acid.
Ans: – Option (a).
2)Aqueous solutions of acids conduct electricity. This shows that
(a) They contain H+ ions
(b) They contain OH– ion
(c) They contain cations and anions
(d) They contain both H+ and OH– ions.
Ans: – Option (c).
3)Which of the following is not a strong acid?
(a) HCl (b) HBr
(c) HI (d) HF.
Ans: – Options (d).
4)Self dissociation of water produces
(a) a large number of H+ ions
(b) a large number of OH– ions
(c) H+ and OH– ions in equal numbers
(d) H+ and OH– ions in unequal numbers
Ans: – Option (c).
5)In any aqueous basic solution
(a) [H+] > [OH–] (b) [H+] < [OH–]
(c) [H+] = [OH–] (d) [H+] = 0.
Ans: – Option (b).
6)In an aqueous solution of HCl which of the following species is not present?
(a) H+ (b) OH–
(c) HCl (d) Cl-.
Ans: – Option (b).
7) Which of the following is not a raw material for manufacturing washing soda?
(a) Lime stone (b) Ammonia
(c) Slaked lime (d) Sodium chloride.
Ans: – Option (b).
Mark the following statements as true (T) or false (F):
1)Acids furnish H+ ions only in the presence of water. (True)
2)Lime water turns blue litmus red. (False)
3)HF is a strong acid. (False)
4) H2 gas is produced when acids react with metal oxides. (True)
5) Corrosive action of acids is due to H+ ions present in them. (True)
6)When the pH of the rain water become more than 5.6 it is called acid rain. (True)
7)Aqueous solutions of all the salts are neutral in nature i.e., neither acidic nor basic in nature. (False).
III. Fill in the blanks
1) Acid’s taste ……..sour………….. while bases taste …….. biter…………..
2) Milk of magnesia turns ……. blue…………… litmus ……. yellow……………
3) One mole of sulphuric acid would furnish ……..2………….. mole/s of H+ ions and
…….1……….. moles of SO4(2–) ions.
4) ……..H2………….. gas is produced when acids react with metal hydrogen carbonates.
5)Lime water turns milky on passing CO2 gas due to the formation of……….OH- ions…………
6)The reaction between an acid and a base is known as ……….neutralize reaction…………
7) Bee sting injects ……..formic………….. acid which causes severe pain and burning sensation.
8)In NH4NO3 the acid radical is ……NH4(+) ……………. and the basic radical is……NO3(-) ………
9) Chemically baking soda is ……NaHCO3…………….
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