Everyday Science — All MCQs
2717 questions available
Q61.Pressure of a gas at constant volume increases due to an increase in?
Correct Answer: B
According to Gay-Lussac's Law, gas pressure increases with temperature at constant volume.
Q62.Which part of brain controls balance and coordination?
Correct Answer: B
The cerebellum at the back of the brain controls balance, coordination, and motor movements.
Q63.Diamonds is a?
Correct Answer: D
Diamond is an allotrope of carbon where atoms are arranged in a crystal structure.
Q64.Which substance is used in Pencil?
Correct Answer: B
Pencils use graphite (a form of carbon) as the writing core, not lead.
Q65.Who presented the scientific theory of Evolution?
Correct Answer: C
Charles Darwin presented the theory of evolution by natural selection in 'On the Origin of Species' (1859).
Q66.Gamma rays were discovered by?
Correct Answer: A
This question appears garbled in the PDF. The answer key indicates option A.
Q67.The radioactive isotope of hydrogen is called?
Correct Answer: A
Tritium is the radioactive isotope of hydrogen.
Q68.Blood circulation was discovered by?
Correct Answer: C
William Harvey discovered the circulation of blood in the human body.
Q69.The outer part of the earth is called?
Correct Answer: A
The crust is the outermost layer of the Earth.
Q70.Which body part produces urea?
Correct Answer: A
Urea is produced in the liver as a byproduct of protein metabolism.
Q71.Carbon monoxide attaches with?
Correct Answer: A
Carbon monoxide binds strongly with hemoglobin in the blood, reducing oxygen transport.
Q72.Nuclear fission is caused by the impact of?
Correct Answer: C
Nuclear fission is triggered when a neutron strikes the nucleus of a heavy atom.
Q73.Which type of extinguisher is used for petroleum fire?
Correct Answer: B
Foam extinguishers are used for petroleum and oil fires as foam smothers the flame.
Q74.All are physical pollutants except?
Correct Answer: B
Soot is a particulate/chemical pollutant, unlike heat, radiation, and sound which are physical pollutants.
Q75.The first trophic level refers to:
Correct Answer: B
Green plants (producers) occupy the first trophic level in a food chain.
Q76.In the human body percentage of which element is highest?
Correct Answer: A
Q77.Which type of energy is produced during a fission reaction in a nuclear reactor?
Correct Answer: D
Q78.Which is the hottest layer of the Earth's atmosphere?
Correct Answer: A
Q79.Winter air comes from which winds?
Correct Answer: C
Q80.Which part of the brain predominantly coordinates body movement and balance?
Correct Answer: A