UPSC Recruitment Paper 2017 : Scientific Officer (Chemical) (Aptitude Test)

UPSC Recruitment Paper 2017 : Scientific Officer (Chemical)

(Aptitude Test)

1. Cordite, an explosive material is prepared from:
(a) 93% Nitro-glycerine and 7% Gun-cotton
(b) Cool mixture of HNO₃ and H₂SO₄
(c) Gelatinized combination of Nitro-glycerine and Nitro-cellulose
(d) 79% Potassium Chloride and 21% Nitro-benzol

2. Consider the following materials:
1. Sand
2. Granite
3. Clay Brick
4. Steel
What is the correct sequence in the  increasing order of their bulk density?

 (a) 1, 3, 2 and 4
(b) 3, 1, 2 and 4
(c) 1, 3, 4 and 2
(d) 3, 4, 1 and 2

3. The equation: λ = h/m.v =h/p describes:
where: λ is the wavelength of the particle, h is the Plank’s constant and p is the momentum of the particle
(a) Sommerfeld’s relative atomic model
(b) Bohr’s Quantum atomic model
(c) Thomson’s Plum pudding atomic model
(d) De-Broglie’s atomic model

4. Which one of the following is not a  neutral refractory material?
(a) Carbon
(b) Bauxite
(c) Chromite
(d) Dolomite

5. Flint glass is also called as:
(a) Soda-lime glass
(b) Potash- lime glass
(c) Potash- lead glass
(d) Borosilicate glass

6. The yield of concrete per bag of cement for a concrete mix of 1: 2: 4 proportions is nearly:
(a) 0.18 m³
(b) 0.16 m³
(c) 0.14 m³
(d) 0.12 m³

7. Which one of the following minerals is  not found in the sedimentary rocks?
 (a) Calcite
(b) Gypsum
(c) Magnesite
(d) Feldspar

8. Which one of the following oils is the commonly used as vehicle of a paint?
 (a) Nut oil
(b) Linseed oil
(c) Poppy oil
(d) Tung oil

9. Which one of the following is an example for a biodegradable plastic?
(a) Polybutadienehydroxide
(b) Chlorofluorocarbon
(c) Polyhydroxyalkanoate
(d) Melamine formaldehyde

10. Bitumen completely dissolves in which one of the following solvents?
(a) Water
(b) Carbon monoxide
(c) Carbon dioxide
(d) Carbon bisulphide

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