everyday science MCQs – Page 7

Practise multiple-choice questions from everyday science for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

everyday science Mcqs
121. The SI unit of electric current is?
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A. Watt

B. Coloumb

C. Ampere

D. Volt

122. In a railway track, two rails are joined end to end with a gap tin between them because?
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A. Accidents due to contraction in winter can be avoided

B. Steel can be saved

C. Air gaps are necessary for bearing the weight of running train

D. Accidents due to expansion in summer can be avoided

E. All of these

123. The main constituent of hemoglobin is___________?
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A. Calcium

B. Chlorine

C. None of these

D. Iron
124. Water is heated in a kettlE. The inside water is heated by convection. A person sitting near the fire receives heat by ________?
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A. Reflection

B. Conduction

C. Radiation

D. None of these

E. Convection

125. During winter in cold countries, the __________ is mixed to melt the ice on the icy roads.
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A. Water

B. Chlorine

C. Carbon dioxide

D. Salt
126. The Carbon Dioxide in the atmosphere, by volume, is_______?
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A. 0.039%

B. 30%

C. 3.90%

D. 13%

127. The most densest substance on the Earth is __________.
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A. Platinum

B. Steel

C. Copper

D. Osmium
128. ECG is used for the diagnosis of aliments of ?
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A. Heart

B. Kidneys

C. Lungs

D. Brain

129. Diamond is a very expensive ornament. It is composed of a single element ___________?
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A. None of these

B. Carbon

C. Silver

D. Gold

E. Platinum

130. Eugenics is the study of___________________?
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A. Different races of mankind

B. None of these

C. Genetic of plants

D. People of European region

E. Altering human beings by changing their genetic components
131. In night, when photosynthesis is stopped, plants__________?
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A. give off Carbon Dioxide

B. take in Carbon Dioxide

C. None of these

D. give off Oxygen

132. Deficiency of Vitamin-D results in __________?
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A. night blindness

B. hair fall

C. scurvy

D. rickets
133. The fluid part of blood is known as __________?
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A. plasma

B. None of these

C. platelets

D. blood cells

134. A satellite moving round the earth with a uniform speed has____________?
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A. An accelerated motion

B. No acceleration at all

C. Uniform acceleration

D. Uneven acceleration

135. Trachoma is a disease of the___________?
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A. Liver

B. Eyes

C. Lungs

D. Kidneys

136. Dry ice is ___________?
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A. Solid Carbon dioxide

B. Frozen Water

C. None of these

D. Liquid Nitrogen

E. Methane hydrate

137. It is possible to recognize a person in the dark by simply hearing his unique voice . It is because of the_______?
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A. Quality

B. None of these

C. Frequency

D. Time period

E. pitch
138. The bodyguard of the Earth is __________ that save the Earth from many Comets and Asteroids.
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A. Mars

B. Uranus

C. Jupiter

D. Saturn

139. CNG stands for?
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A. Compressed Natural Gas

B. Conducted Natural Gas

C. Converted Natural Gas

D. Conduced Natural Gas

140. Which of the following glands secrete tears?
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A. Pituitary

B. Lachrymal

C. Thyroid

D. Pancreas