General-Studies Quiz For FCI Phase I 2022- 9th October

Q1. Which one is a sublime substance?
(a) Iodine
(b) Sugar
(c) Table salt
(d) Potassium Iodide
(e) None of the above

Q2. Which one among the following is used as a moderator in nuclear reactors?
(a) Ozone
(b) Heavy hydrogen
(c) Heavy water
(d) Hydrogen peroxide
(e) None of the above

Q3. Helium is preferred to hydrogen in air balloons because it
(a) is cheaper
(b) is less dense
(c) has greater lifting power
(d) does not form an explosive mixture with air
(e) None of the above

Q4. Which one among the following statements regarding the properties of mixtures and compounds is not correct?
(a) A mixture shows the properties of its constituents but the properties of a compound are entirely different from its constituents
(b) A mixture may be homogeneous or heterogeneous but a compound is a homogeneous substance
(c) The constituents of a mixture can be separated by physical methods but those of a compound cannot be separated by physical methods
(d) Energy is either absorbed or evolved during the preparation of a mixture but not in the preparation of a compound
(e) None of the above

Q5. The value of g on going up from the surface of the Earth and incoming down from the Earth’s surface.
(a) increases, decreases
(b) increases, increases
(c) decreases, decreases
(d) decreases, increases
(e) None of the above

Q6. The weight of a body decreases while going away from equator due to which force?
(a) centrifugal force
(b) centripetal force
(c) accelerated motion
(d) None of these
(e) None of the above

Q7. An artificial satellite orbiting the earth does not fall down because the earth’s attraction
(a) is balanced by the attraction of the moon
(b) vanishes at such distances
(c) is balanced by the viscous drag produced by the atmosphere
(d) produces the necessary acceleration of its motion in a curved path
(e) None of the above

Q8. A long jumper runs before jumping because he
(a) covers a greater distance
(b) maintains momentum conservation
(c) gains energy by running
(d) gains momentum
(e) None of the above

Q9. In plants, which one of the following tissues is dead?
(a) Parenchyma
(b) Collenchyma
(c) Sclerenchyma
(d) Phloem
(e) None of the above

Q10. Which one of the following is considered as a cell within a cell?
(a) Ribosome
(b) Chloroplast
(c) Lysosome
(d) Golgi complex
(e) None of the above

Solutions

S1.Ans. (a)
Sol. Sublimation is the process is which a substance directly goes into vapour state without passing through the liquid state. Iodine is a substance which can sublime. Some other examples are camphor, naphthalene, etc.

S2.Ans. (c)
Sol. In nuclear reactor heavy water (D2O) used to slow down the speed of neutrons i.e., act as moderator.

S3.Ans. (d)
Sol. Hydrogen combines with oxygen with explosive force in the presence of a spark. Helium is an inert gas that will not burn or explode, so is much safer to use in balloons instead of hydrogen.

S4.Ans. (d)
Sol. The compound is always formed by absorption or evolution of energy but no energy is released or absorbed during the formation of mixture.

S5.Ans. (c)
Sol. The value of g decreases as we go above the surface of the earth. Due to to combined result of change in R and M, value of g decreases – as we go inside the earth and becomes zero at the centre of the earth .

S6.Ans. (b)
Sol. When a body is taken from equator two poles its weight increase because of the acceleration due to gravity increases. The rotation of the earth about its own axis also produces a force on the body. This effect will further reduce the weight of the body. So due to both these affects the weight of the body.

S7.Ans. (d)
Sol. An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of earth provides the necessary acceleration for its motion. This acceleration is “constant” in magnitude but “changing in direction”. By the launch rocket, immediately before the satellite is established in the predetermined orbit, the speed given to it is 30,000 km/hr. The speed must be great enough so gravity brings the satellite back to Earth but not so great that the satellite escapes gravity out into space.

S8.Ans. (b)
Sol. A long jumper runs before jumping to maintain momentum. This helps in jumping higher and longer because of inertia of motion gained due to the motion.

S9.Ans. (c)
Sol. Sclerenchyma tissues are found in hard parts of plant body, in cortex, pith, hypodermis, in the pulp of fruits. Young cells are living and they have protoplasm. But matured cells becomes dead due to deposition of secondary walls. They give mechanical support, strength and rigidity to the plant body.

S10.Ans. (b)
Sol. Chloroplast is considered as cell within a cell because it contains its own DNA. Hence, it is a semiautonomous organelle. It helps in photosynthesis.