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Chapter 8: Problem 45
Which among the following metals is not present in german silver? (a) Cu (b) \(\mathrm{Ag}\) (c) \(\mathrm{Zn}\) (d) \(\mathrm{Ni}\)
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A volume of \(1 \mathrm{ml}\) of a gaseous aliphatic compound \(\mathrm{C}_{n} \mathrm{H}_{3 n} \mathrm{O}_{m}\) is completely burnt in an excess of oxygen. The contraction in volume (in \(\mathrm{ml}\) ) is
Mole fraction of solute in an aqueous solution of \(\mathrm{NaOH}\) is \(0.1 .\) If the specific gravity of the solution is \(1.4\), the molarity of the solution is (a) \(6.93\) (b) \(0.1\) (c) \(71.4\) (d) \(0.14\)
What mass of carbon disulphide, \(\mathrm{CS}_{2}\), can be completely oxidized to \(\mathrm{SO}_{2}\) and \(\mathrm{CO}_{2}\) by the oxygen liberated when \(325 \mathrm{~g}\) of \(\mathrm{Na}_{2} \mathrm{O}_{2}\) react with water? (a) \(316.67 \mathrm{~g}\) (b) \(52.78 \mathrm{~g}\) (c) \(633.33 \mathrm{~g}\) (d) \(211.11 \mathrm{~g}\)
\(V_{1} \mathrm{ml}\) of unknown gas (A) \(+V_{2} \mathrm{ml}\) of \(\mathrm{O}_{2}\) \(\rightarrow\left(V_{1}+V_{2}\right) \mathrm{ml}\) of \(\mathrm{CO}_{2} .\) Gas 'A' may be (a) \(\mathrm{CO}\) (b) \(\left(\mathrm{CO}+\mathrm{CO}_{2}\right)\) in equal proportion (c) \(\mathrm{C}_{12} \mathrm{O}_{9}\) (d) \(\mathrm{C}_{3} \mathrm{O}_{2}\)
Equal masses of oxygen, hydrogen and methane are taken in identical conditions. What is the ratio of the volumes of the gases under identical conditions? (a) \(16: 1: 8\) (b) \(1: 16: 2\) (c) \(1: 16: 8\) (d) \(2: 16: 1\)
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