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1. 18g glucose is dissolved in 180g of water. The relative lowering of vapour pressure is a) 1 b) 1.8 c) 0.01 d) 0.001 ... Answer is c) Explanation: show Answer 2. 100g of a 10% (w/w) NaOH contains 10g of NaOH in. a) 100g of H 2 O b) 110g of H 2 O c) 10g of H 2 O d) 100g solution ... Answer is d) Explanation: First we need to calculate the mass of solute and solvent from 10%(W/W) NaOH. 10% (W/W) NaOH contains 10 gram (w) of NaOH(solute) dissolved in 100g (w) of solution. So, mass of solute = 10g Mass of solution = 100g show Answer 3. Which of the following W/W solutions has the lowest freezing point? a) 18% glucose b) 6% urea c) 34.2% sucrose d) 9% glucose ... Answer is c) Explanation: Depression in freezing point is colligative property and it is directly related to molality of solute. Solution with highest molality will show highest freezing point depressi...

1. The rate of reaction------------as the reaction proceeds. a) Increases b) Decreases c) Remains the same d) May increase or decrease ... Answer is b) Explanation: Rate of reaction is directly proportional to concentration of reactants. As reaction proceeds, the concentration of reactant decreases, so rate of reaction also decreases. show Answer 2. The unit of the rate constant is the same as that of reaction in------------order reaction. a) First b) Second c) Third d) Zero ... Answer is d) Explanation: In zero order reaction, the rate of reaction is independent of concentration of reactant, So rate of reaction and rate constant are equal, so their units are also same. Consider a reaction, A .......> B If this reaction is a zero order, then rate equation can be derived as follow: Rate of reaction ∝ [A] 0 Rate of reaction = K [A] 0 Rate of reaction = K show Answer 3. For the reaction, ...

Chemical Equilibrium MCQs and Answers with explanation 1. Kc is independent of a) Temperature b) Pressure c) Both temperature and pressure d) Kp ... Answer is b) Explanation: Kc is the ratio of concentration of products to concentration of reactants. In endothermic reactions, heat is involved in reactant side (i.e., Reactant + heat .......> Product) and in exothermic reaction, heat is involved in product side (i.e., Reactant .......> Product + heat) . If we increase the temperture, endothermic reaction will move in forward direction with increase in concentration of products and exothermic reaction will move in reverse direction with increase in concentration of reactants to re-establish the equilibrium. As a result, concentration of reactant and product will be changed. Hence, Kc will become larger in endothermic reaction and smaller in exothermic reaction. All reversible chemical reactions are either endothermic or exothermic, so, Kc is t...

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