Stoichiometry Questions

• 6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H2 produced will be __________ gm.
• Pick out the wrong statement.
• Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5°C).
• Molar heat capacity of water in equilibrium with ice at constant pressure is
• In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the
• Atoms of the same element, but of different masses are called
• Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the
• With rise in pressure, the solubility of gases in solvent, at a fixed temperature
• A solution is made by dissolving 1 kilo mole of solute in 2000 kg of solvent. The molality of the solution is
• The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol XM satisfies
• An ideal gas can be liquified, because
• A sample of well water contains 140 gm/m3 Ca2+ ions and 345 gm/m3 Na+ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO3 in gm/m3 is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)
• Pick out the wrong statement.
• Assuming that CO2 obeys perfect gas law, calculate the density of CO2 (in kg/m3) at 263°C and 2 atm.
• Average molecular weight of air is about
• At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be
• If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is __________ times.
• Increasing the temperature of an aqueous solution will cause decrease in its
• The chemical nature of an element is independent of
• Which of the following is an exothermic reaction?