ECAT Chemistry Chapter 8 Chemical Equilibrium Online Test With Answers

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ECAT Chemistry Chapter 8 Chemical Equilibrium Online Test

Sr. # Questions Answers Choice
1 For which system does the equilibrium constant, kc has units of (concentration) ? <p class="MsoNormal">N<sub>2</sub>+3H<sub>2--</sub>-----2NH<sub>3</sub><o:p></o:p></p> <p class="MsoNormal">H<sub>2</sub>+L<sub>2</sub>---------2HL<o:p></o:p></p> <p class="MsoNormal">2NO<sub>2</sub>----------N<sub>2</sub>O<sub>4</sub><o:p></o:p></p> <p class="MsoNormal">2HF--------H2+F<sub>2</sub><o:p></o:p></p>
2 0.5 4.0 2.5 0.25
3 Ammonium carbonate when heated to 200°C gives a mixture of NH3and CO2vapour with a density of 13.0. What is the degree of dissociation of ammonia carbonate? 3/2 1/2 2 1
4 Increase in concentration of 1 Decrease in concentration of I<sub>2</sub> Increase in temperature Increase in total pressure
5 Which of the following is a characteristic of a reversible reaction? It never proceeds to completion It can be influenced by a catalyst It proceeds only in the forward direction Number of moles of reactants and products are equal
6 When the rate of formation of reactants is equal to the rate of formation of products, this is known as Chemical reaction Chemical equilibrium Chemical kinetics None
7 In a lime kiln, to get higher yield of CO2, the measure that can be taken is To main high temperature To pump out CO<sub>2</sub> To remove Cao To add more CaCO<sub>3</sub>
8 High temperature Low temperature Low pressure High pressure
9 High temperature and low pressure Low temperature and low pressure Low temperature and high pressure High temperature and high pressure
10 Under what condition of temperature and pressure the formation of atomic hydrogen from molecular hydrogen will be favourd High temperature and high pressure Low temperature and low pressure High temperature and low pressure :Low temperature and high pressure
11 A chemical reaction is in equilibrium when Formation of product is minimum Reactants are completely transformed into products Rates of forward and backward reactions are equal Equal amounts of reactants and products are present
12 The rate of forward reaction is two times that of the reverse reaction at a given temperature and identical concentration, K equilibrium is 0.5 1.5 2.5 2.0
13 1 mole of N2and 2 moles of H2are allowed to react in a 1 dm3vessel. At equilibrium 0.8 mole of NH3is formed. The concentration of H2in the vessel is 0.6 mole 0.8 mole 0.2 mole 0.4 mole
14 Which of the following favours the reverse reaction in chemical equilibrium? Increasing the concentration of the reactant Removal of the least one of the products at regular intervals Increasing the concentration of one or more of the products None of these
15 When H2and I2are mixed and equilibrium is attained, then Amount of HI formed is equal to the amount of H<sub>2</sub>dissociated HI dissociation stops The reaction stops completely None of these
16 A gas bulb is filled with NO2gas and immersed in an ice bath at 0°C which becomes colourless after sometimes. This colourless gas will be NO<sub>2</sub> N<sub>2</sub>O N<sub>2</sub>O<sub>4</sub> N<sub>2</sub>O<sub>5</sub>
17 K<sub>p</sub>&gt; K<sub>c</sub> K<sub>c</sub>&gt; K<sub>p</sub> K<sub>p</sub>= K<sub>c</sub> None of these
18 Pressure change Temperature change Concentration change Catalyst
19 0.12 0.50 0.25 4.00
20 Increases Decreases Remains same Cannot be predicted
21 Low pressure High pressure High temperature High concentration of SO<sub>2</sub>
22 1 10 5 0.33
23 Introduction of an inert gas at constant volume Introduction of PCl<sub>3</sub>(g) at constant Introduction of PCl<sub>5</sub>(g) at constant volume Introduction of Cl<sub>2</sub>at constant volume
24 8 4 9 3
25 The concentration of reactants is increased by x, then equilibrium constant K becomes ln K/x K/x K + x K
26 In a reversible reaction, two substances are in equilibrium. If the concentration of each one is reduced to half, the equilibrium constant will be Reduced to half of its original value Doubled Same Reduced to one fourth its original value
27 0.073 0.147 0.05 0.026
28 32 64 16 4
29 High temperature and low pressure Low temperature and high pressure Low temperature and low pressure High temperature and high pressure
30 1.1 mol of A is mixed with 2.2 mol of B and the mixture is kept in on litre flask till the equilibrium is reached. At equilibrium, 0.2 mol of C is formed. If the equilibrium reaction is A+2B 2C+D, the value of equilibrium constant is 0.002 0.004 0.001 0.003
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