Practice Test: Question Set - 33
1. Transparent soaps (e.g. Pears) are
- (A) Usually soft soap
(made from coconut oil) in which cane sugar & alcohol are added and finally
washed with methylated spirit to achieve transparency
- (B) Metallic soaps with
frothing agent and free Stearic acid to achieve transparency
- (C) Metallic soaps with
frothing agent from which glycerine has not been recovered
- (D) None of these
2. Wax is a
- (A) Mixture of glycerides
- (B) Mixture of esters of
polyhydric alcohols excepting glycerine
- (C) Liquid at room
temperature
- (D) Mixture of glycerides
of fatty acids
3. The biochemical treatment applied to sewage effluents is a process of
- (A) Dehydration
- (B) Reduction
- (C) Oxidation
- (D) Polymerization
4. Ordinary glass is not a/an
- (A) Amorphous isotropic
material
- (B) Supercooled liquid
- (C) Material with sharp
definite melting point
- (D) Electrical
insulator
5. Hydrochloric acid is also known as
- (A) Oil of vitriol
- (B) Muriatic acid
- (C) Strong organic acid
- (D) Green acid
6. At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
- (A) Independent of
- (B) Directly proportional
to
- (C) Inversely
proportional to
- (D) Proportional to the
square of
7. Higher viscosity index of a lubricating oil denotes
- (A) Less changes in
fluidity of oil with temperature
- (B) Substantially high
change in fluidity of oil with temperature
- (C) Its unsuitability
under varying temperature conditions
- (D) None of these
8. Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.
- (A) -5 to 0
- (B) 5 to 10
- (C) 30 to 50
- (D) 75 to 80
9. Chloral is used in the manufacture of
- (A) DDT
- (B) BHC
- (C) Parathion
- (D) None of these
10. __________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace.
- (A) Bauxite
- (B) Limestone
- (C) Quartz
- (D) Manganese
11. Reverse osmosis is normally used for the
- (A) Separation
of isotopes of uranium from gaseous uranium hexafluoride
- (B) Separation of helium
from natural gas
- (C) Desalination of
brackish water to produce potable (drinking) water
- (D) Purification of
oxygen
12. Dry ice (solidified CO2) is used for the
- (A) Storage
& shipment of frozen foods and ice-creams
- (B) Liquefaction of
permanent gases
- (C) Liquefaction of
natural gas
- (D) None of these
13. Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance.
- (A) Flint
- (B) Soda
- (C) Pyrex
- (D) Potash
14. The catalyst used in shift converter is
- (A) Nickel
- (B) Vanadium
- (C) Silica gel
- (D) Alumina
15. CaO is called
- (A) Quick lime
- (B) Slaked lime
- (C) Limestone
- (D) Calcite
Next Tests: