General-Studies Quiz For FCI Phase I 2022- 30th October

Q1. An egg when placed in ordinary water sinks but floats when placed in brine. This is because
(a) density of brine is less than that of ordinary water
(b) density of brine is equal to that of ordinary water
(c) density of brine is greater than that of ordinary water
(d) None of these
(e) None of the above

Q2. Which of the following is not an property of crystalline solid?
(a) The atoms and molecules are arranged in a definite order
(b) It does not have a sharp melting point
(c) Crystalline solids are bounded by flat surfaces
(d) They posses uniform chemical composition
(e) None of the above

Q3. The torque produced by a force depends on
(a) The magnitude of the force
(b) The direction of the force
(c) The point of application of the force relative to origin
(d) All of the above
(e) None of the above

Q4. A man is sitting in a boat which is floating in pond. If the man drinks some water from the pond, the level of water in the pond will
(a) rise a little
(b) fall a little
(c) remain stationary
(d) None of these
(e) None of the above

Q5. A block of ice is floating in a beaker containing liquid of specific gravity greaterthan one. When ice melts completely what happens to the level of liquid in the beaker?
(a) It will remain the same as before
(b) It will go down
(c) It will rise up
(d) It may or may not change depending upon size of beaker
(e) None of the above

Q6. Why do two ice blocks join to form one block when pressed together?
(a) Melting point of ice is lowered with increase in pressure
(b) Melting point of ice increases with increase in pressure
(c) Melting point of ice remains unchanged with increase in pressure
(d) Melting point of ice is 0°C
(e) None of the above

Q7. For which one of the following is capillarity not the reason?
(a) Blotting of ink
(b) Rising of underground water
(c) Spread a water drop on a cotton cloth
(d) Rising of water from the roots of a plant to its foliage
(e) None of the above

Q8. Which of the following groups is present in animal cells?
(a) Mitochondria, Cell membrane, Cell wall, Cytoplasm
(b) Chloroplasts, Cytoplasm, Vacuole, Nucleus
(c) Nucleus, Cell membrane, Mitochondria, Cytoplasm
(d) Vacuole, Cell membrane, Nucleus, Mitochondria
(e) None of the above

Q9. The flavour of apple is mainly due to which one of the following?
(a) Formalin
(b) Benzene
(c) Ethanol
(d) Benzaldehyde
(e) None of the above

Q10. Nail varnish remover generally contains which one of the following?
(a) Vinegar
(b) Benzene
(c) Methyl alcohol
(d) Acetone
(e) None of the above

Solutions

S1.Ans. (c)
Sol. An egg when placed in ordinary water sinks to the bottom as the density of egg is higher than the density of ordinary water. Density is the mass of a material per unit volume, thus, adding salt to water (brine) increases the density of solution because salt increases the mass without changing the volume. That is why, an egg when placed in brine would float.

S2.Ans. (b)
Sol. The solids in which the constituent particles of matter are arranged and organized in a specific manner are called Crystalline Solids. These solids contain crystals in their structure and each crystal has definite geometry. The sharp freezing point is found in crystalline solids. This is because the distance between same atoms/molecules or ions is same and remains constant.

S3.Ans. (d)
Sol. Torque is the cross product of force and perpendicular distance to an axis of rotation. The torque produced by a force depends on the magnitude of the force, the direction of the force, the point of application of the force relative to origin.

S4.Ans. (c)
Sol. The level of water in the pond remains unchanged.

S5.Ans. (c)
Sol. The specific gravity of liquid is greater than one and as the specific gravity of water is 1 hence the level of liquid in the beaker will rise up.

S6.Ans. (a)
Sol. When two ice blocks are pressed together, little heat is generated due to pressure and of friction, which just melts the outer layer. When that melts, friction decreases and due to the low temperature of both the ice cubes, the water just refreezes.

S7.Ans. (b)
Sol. Capillary action, or capillarity, is a phenomenon where liquid spontaneously rises in a narrow space such as a thin tube, or in porous materials such as paper or in some non-porous materials such as liquefied carbon fibre. This effect can cause liquids to flow against the force of gravity or the magnetic field induction. In blotting of ink, spread of water drop on a cotton cloth and the rising of water from the roots of a plant to its foliage.

S8.Ans. (c)
Sol. Nucleus, cell membrane, mitochondria and cytoplasm are present in animal cells.

S9.Ans. (c)
Sol. The flavour of apples is mainly due to the ethanol (C2H5OH).

S10.Ans. (d)
Sol. Nail varnish remover generally contains acetone (CH3COCH3).