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Online General Science Quiz Set No - 20

General Science questions have been taken from previous years question papers of different competitive examinations such SSC CGL, SSC CHSL, CDS, NDA, Bank, State PSC, Railways, MAT, CAT, etc.

191) PVC is obtained by the polymerisation of:
A) Propene
B) Vinyl Chloride
C) Styrene
D) Acetylene

192) Quartz crystals normally used in quartz clocks etc. is chemically:
A) Sodium Silicate
B) Silicon dioxide
C) Germenium dioxide
D) A mixture of Silicon dioxide and Germenium dioxide

193) Radioactive disintegration of Uranium ultimately results in formation of:
A) Radium
B) Thorium
C) Polonium
D) Lead

194) Radioactive elements emit
A) Infrared waves
B) Ultraviolet waves
C) alpha, beta and gamma radiations
D) Radiowaves

195) Rainwater collected after 30 to 40 minutes of raining is not suitable for drinking because it?
A) contains bacteria and dirt
B) is acidic
C) contains dissolved toxic chemicals
D) is deficient in minerals

196) Rayon is chemically:
A) Glucose
B) Amylase
C) Cellulose
D) Peptin

197) Reaction of alcohol, with carboxylic acid is known as:
A) Substitution reaction
B) Addition reaction
C) Esterification
D) Hydrogenation

198) Ready source of energy available for athletes is?
A) Carbohydrates
B) Vitamins
C) Proteins
D) Fats

199) Rectified spirit is a?
A) mixture of 95% ethanol + 5% pyridine
B) mixture of 95%, ethanol + 5% methanol
C) mixture of 95% ethanol + 5% H2O
D) 100% ethanol

200) Relative humidity is expressed as
A) Grams
B) Kilograms
C) Percentage
D) Ratio