Problem 13
The boiling point of water is exceptionally high because (a) there is covalent bond between \(\mathrm{H}\) and \(\mathrm{O}\) (b) water molecule is not linear (c) water molecule is linear (d) water molecules associate due to hydrogen bonding
Problem 14
The \(\mathrm{H}^{-\mathrm{O}-\mathrm{H} \text { angle in water molecule is about }}\) (a) \(90^{\circ}\) (b) \(105^{\circ}\) (c) \(135^{\circ}\) (d) \(180^{\circ}\)
Problem 15
Action of water or dilute mineral acids on metals can give (a) tritium (b) dihydrogen (c) trihydrogen (d) mono hydrogen
Problem 16
Water is oxidized to oxygen by (a) \(\mathrm{H}_{2} \mathrm{O}_{2}\) (b) \(\mathrm{KMnO}_{4}\) (c) \(\mathrm{ClO}_{2}\) (d) fluorine
Problem 17
The reagent commonly used to determine hardness of water titrimetrically is (a) disodium salt of EDTA (b) sodium thiosulphate (c) sodium citrate (d) oxalic acid
Problem 18
The chemical formula of zeolite is ..... (a) \(\mathrm{Na}_{2} \mathrm{Al}_{2} \mathrm{Si}_{2} \mathrm{O}_{\mathrm{g}} \cdot \mathrm{xH}_{2} \mathrm{O}\) (b) \(\mathrm{Na}_{2}\left(\mathrm{Na}_{4}\left(\mathrm{PO}_{3}\right)_{6}\right.\) (c) \(\mathrm{Ca}_{2} \mathrm{Al}_{2} \mathrm{Si}_{2} \mathrm{O}_{8}\) (d) \(\mathrm{K}_{2} \mathrm{Al}_{2} \mathrm{Si}_{2} \mathrm{O}_{8} \times \mathrm{H}_{2} \mathrm{O}\)
Problem 19
Which one of the following statements about the zeolite is false? (a) They have open structure which enables them to take up small molecules (b) They are used as cation exchangers (c) Zeolites are aluminosilicates having three dimensional network (d) None of the \(\mathrm{SiO}_{4}^{4-}\) units are replaced by \(\mathrm{AlO}_{4}^{5-}\) and \(\mathrm{AlO}_{6}{ }^{9}\) ions in zeolites
Problem 20
Which one of the following compounds undergo hydrolysis during distillation to yield hydrogen peroxide? (a) \(\mathrm{HNO}_{3}\) (b) \(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}\) (c) \(\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{8}\) (d) \(\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{6}\)
Problem 21
The reagent used in the detection of fluoride in water is \(\ldots \ldots\) (a) Phenolphthalein (b) Zirconium-alizarin \(\mathrm{S}\) (c) Soda lime (d) Bayer's reagent
Problem 23
The products formed when heavy water reacts with magnesium nitride, are \(\ldots .\) (a) \(\mathrm{ND}_{3}, \mathrm{Mg}(\mathrm{OD})_{2}\) (b) \(\mathrm{ND}_{3}, \mathrm{Mg}(\mathrm{OH})_{2}\) (c) \(\mathrm{NH}_{3}, \mathrm{Mg}(\mathrm{OH})_{2}\) (d) \(\mathrm{NH}_{3}, \mathrm{Mg}(\mathrm{OD})_{2}\)
