1000 Best General Science MCQ-Questions
Q177). In vulcanisation, natural rubber is heated with
a).Carbon
b).Silicon
c).Sulphur
d).Phosphorous
Correct Answer:
Sulphur
Explanation:
Q178). Deep blue colour is imparted to glass by the presence of
a).cupric oxide
b).nickel oxide
c).cobalt oxide
d).iron oxide
Correct Answer:
cobalt oxide
Explanation:
Q179). Glass is made of the mixture of
a).quartz and mica
b).sand and silicates
c).salt and quartz
d).sand and salt
Correct Answer:
sand and silicates
Explanation:
Q180). The vast resources of unutilised natural gas can be used in the production of
a).graphite
b).Synthetic petroleum
c).fertilisers
d).carbide
Correct Answer:
fertilisers
Explanation:
Q181). Paper is manufactured by
a).Wood and resin
b).Wood, sodium and bleaching powder
c).Wood, calcium, hydrogen sulphite and resin
d).Wood and bleaching powder
Correct Answer:
Wood, calcium, hydrogen sulphite and resin
Explanation:
Q182). Gypsum is added to cement clinker to
a).increase the tensile strength of cement
b).decrease the rate of setting of cement
c).facilitate the formation of colloidal gel
d).bind the particles of calcium silicate
Correct Answer:
decrease the rate of setting of cement
Explanation:
Q183). Soap is a mixture of sodium or potassium salts of
a).dicarboxylic acids
b).monocarboxylic acids
c).glycerol
d).tricarboxylic acids
Correct Answer:
monocarboxylic acids
Explanation:
Q184). The type of glass used in making lenses and prisms is
a).jena glass
b).soft glass
c).pyrex glass
d).flint glass
Correct Answer:
flint glass
Explanation: