⚡️ General science multiple choice questions PDF Test No – 10
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General science multiple choice questions
451.How does dehydration help in the preservation of food ?
(a) Nutrients are concentrated
(b) The growth of microorganisms is checked
(c) The surface of foodstuffs becomes hard
(d) Chemical reactions stop in the absence of water
452.Which mechanism regulates the body temperature ?
(a) Excessive intake of water
(b) Temperature regulating mechanism located in the base of the brain
(c) Regular intake of food
(d) Constant flow of blood in the capillaries
453. Which of the following statements is true ?
(a) Both the salinity and the density of sea decrease with depth
(b) Both the salinity and the density of sea increase with depth
(c) The salinity increases but the density of sea decreases with depth
(d) The salinity decreases but the density of sea increases with the depth
454. In what sequence are the following obtained from a natural gas well ?
1. Natural gas
3. Crude oil
(c) 3, 2, 1
(d) 2, 1,3
455.Why does a man weigh more at the poles than at tip equator?
(a) Because the gravitational pull is less at the poles
(b) Because there is no atmosphere at the poles
(c) Because the gravitational pull is more at the poles
(d) Because of none of these reasons
456.Which of the following is correct ?
(a) Planets have an apparent motion but do not twinkle
(b) Planets have an apparent motion and twinkle
(c) Planets have no apparent motion but twinkle
(d) Planets have no apparent motion and do not twinkle
457.The sex of the off-spring is determined when
(a) The sperm fertilises the ovum
(b) The conception takes place
(c) The embryo is partially developed
(d) The end of gestation period is near
458.Colour blindness is
(a) More common among women
(b) Very rare in men
(c) Very rare in women
(d) Found in both the sexes
459.What happens when alcohol is taken in excess ?
(a) It destroys the liver
(b) It produces inflammation of the stomach
(c) It causes the heart to become weak
(d) All of the above
460. What happens when the temperature of water falls from 30°C to 0°C ?
(a) The volume of ice formed will be less than the volume of water
(b) Water will not freeze at 0°C
(c) The volume of ice formed will be more than the volume of water
(d) None of these
461. When rice is boiled, it expands because
(a) The grains absorb moisture and swell
(b) The starch gelatinises and swells
(c) The starch gets polymerized
(d) Sugar breaks down in the grains
462. Which of the following is the most common wheat disease in India ?
(a) Green ear
(d) Loose smut