UPSC Recruitment Paper 2018 : Lecturer (Chemical Engineering) in DTTE

1. In which one of the following reactions, the rate is independent of the concentration of the reactants?
(a) Zero-Order Reaction
(b) Fractional-order Reaction
(c) First-Order Reaction
(d) Second-Order Reaction

2. When a metal is dipped into a solution containing its own ions:
(a) Reversible electrode is formed
(b) Irreversible cell is formed
(c) A half cell is formed
(d) pH Electrode is formed

3. When 1 g mol of C₇H₁₆ are mixed with 12 g mol of O₂, to produce CO₂ and H₂O. The limiting reactant will be: 
(a) C₇H₁₆
(b) O₂
(c) CO₂
(d) H₂O

4. A property whose value is not an additive and does not vary with the quantity of material in the subsystem is called:
(a) Intensive property
(b) Extensive property
(c) Chemical property
(d) Physical property

5. The number of moles of K₂CO₃ for 117 kg of K will be:
(a) 4.5 g
(b) 3.5 g
(c) 2.5 g
(d) 1.5 g

6. Na2O content of lye containing 73 % of caustic soda will be nearly:
(a) 47.8 %
(b) 56.6 %
(c) 65.4 %
(d) 74.2 %

7. The weight of lime prepared by heating 95% pure limestone of 200 Kg  will be:
(a) 102.8 g
(b) 104.6 g
(c) 106.4 g
(d) 108.2 g

8. The weight of 6.022 × 1023 molecules of CaCO₃ will be:
(a) 75 g
(b) 100 g
(c) 125 g
(d) 150 g

9. One litre of milk weighs 1.035 kg. The butter fat content is 4 % by volume and has a density of 875 k/m³. The density of the fat-free ‘skimmed’ milk will be: (1 m³ = 10³ litres)
(a) 1042 k/m³
(b) 1124 k/m³
(c) 1242 k/m³
(d) 1424 k/m³

10. Consider the following equilibrium equation:  N₂O₄(g) ⇌ 2NO₂(g) The density of an equilibrium mixture of N₂O₄ and NO₂ at 1 atm and 348 K is 1.84 g/L. The value of K_c for equilibrium will be:
(a) 7
(b) 8
(c) 9
(d) 6
 

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