Objective Questions on Science
Q136. Chemically, baking soda is
(a) Baker's yeast
(b) Calcium phosphate
(c) Sodium bicarbonate
(d) Sodium chloride
Answer: (c) Sodium bicarbonate
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
Answer: (a) Birbal Sahni
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
Answer: (b) Solar cells
Q139. Infrared rays were first discovered by
(a) Herschel
(b) Rayleigh
(c) Huygens
(d) Maxwell
Answer: (a) Herschel
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
Answer: (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
Answer: (b) Solar Marx
Q142. Which pollutant is added in atmosphere through thermal power station
(a) Sulphur Dioxide
(b) Nitrogen dioxide
(c) CFC
(d) Sulphur
Answer: (a) Sulphur Dioxide
Q143. Which of the following wastes is highly infectious
(a) Biomedical
(b) Animal
(c) Industrial
(d) Domestic
Answer: (a) Biomedical
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
Answer: (b) less on 0.7 ppm
Q145. The vinegar is __________
(a) Citric acid
(b) Acetic acid
(c) Sulphuric acid
(d) Nitric acid
Answer: (b) Acetic acid
Q146. Which of the following cannot be identified as a natural radioactive element
(a) Radon
(b) Uranium
(c) Radium
(d) Chromium
Answer: (d) Chromium
Q147. Uranium 235 has
(a) 235 Electrons
(b) 235 Protons
(c) 235 Neutrons
(d) 235 Protons and Neutrons together
Answer: (d) 235 Protons and Neutrons together
Q148. Benzene Hexachloride is very effective as
(a) Pain killer
(b) Stimulant
(c) Pesticide
(d) Herbicide
Answer: (c) Pesticide
Q149. What drug is used for the management and treatment of HIV infection
(a) Ritonavir
(b) Penicillin
(c) Rifampicin
(d) Vancomycin
Answer: (a) Ritonavir
Q150. Natural rubber is a polymer of _______
(a) Propene
(b) Isoprene
(c) Formaldehyde
(d) Phenol
Answer: (b) Isoprene
Practice Test Exam