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Objective Questions on Science

Q136. Chemically, baking soda is
(a) Baker's yeast
(b) Calcium phosphate
(c) Sodium bicarbonate
(d) Sodium chloride

Q137. Who had played a major contributions in the study of the fossil plants of India
(a) Birbal Sahni
(b) Ashutosh Mukherjee
(c) Salim Ali
(d) Jayant Narlikar

Q138. What is the source of electric energy in an artificial satellite
(a) A dynamo
(b) Solar cells
(c) A thermopile
(d) A mini nuclear reactor

Q139. Infrared rays were first discovered by
(a) Herschel
(b) Rayleigh
(c) Huygens
(d) Maxwell



Q140. A photoelectric cell converts
(a) Electrical energy into heat energy
(b) Light energy into sound energy
(c) Electrical energy into light energy
(d) Light energy into electrical energy

Q141. Which was the first satellite to be repaired in space
(a) Challenger
(b) Solar Marx
(c) Discovery
(d) Palapa

Q142. Which pollutant is added in atmosphere through thermal power station
(a) Sulphur Dioxide
(b) Nitrogen dioxide
(c) CFC
(d) Sulphur

Q143. Which of the following wastes is highly infectious
(a) Biomedical
(b) Animal
(c) Industrial
(d) Domestic

Q144. Harmless concentration of flouride in drinking water is ________
(a) 1.0 ppm
(b) less on 0.7 ppm
(c) greater on 1.2 ppm
(d) 1.5 ppm

Q145. The vinegar is __________
(a) Citric acid
(b) Acetic acid
(c) Sulphuric acid
(d) Nitric acid



Q146. Which of the following cannot be identified as a natural radioactive element
(a) Radon
(b) Uranium
(c) Radium
(d) Chromium

Q147. Uranium 235 has
(a) 235 Electrons
(b) 235 Protons
(c) 235 Neutrons
(d) 235 Protons and Neutrons together

Q148. Benzene Hexachloride is very effective as
(a) Pain killer
(b) Stimulant
(c) Pesticide
(d) Herbicide

Q149. What drug is used for the management and treatment of HIV infection
(a) Ritonavir
(b) Penicillin
(c) Rifampicin
(d) Vancomycin

Q150. Natural rubber is a polymer of _______
(a) Propene
(b) Isoprene
(c) Formaldehyde
(d) Phenol


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