General-Studies Quiz For FCI Phase I 2022- 25th December

Q1. Which one of the following compounds is used as a sedative?
(a) Potassium bromide
(b) Calcium chloride
(c) Ethyl alcohol
(d) Phosphorus trichloride
(e) None of the above

Q2. In which categories did Marie Curie win her two different Nobel prizes?
(a) Physics and Chemistry
(b) Chemistry and Medicine
(c) Physics and Medicine
(d) Chemistry and Peace
(e) None of the above

Q3. Which one of the following is the secondary source of light in a fluorescent lamp?
(a) Neon gas
(b) Argon gas
(c) Mercury vapour
(d) Fluorescent coating
(e) None of the above

Q4. Very small insoluble particles in a liquid may be separated from it by using
(a) crystallization
(b) fractional distillation
(c) centrifugation
(d) decantation
(e) None of the above

Q5. Why is it difficult to see through fog?
(a) Rays of light suffer total internal reflection from the fog droplets
(b) Rays of light are scattered by the fog droplets
(c) Fog droplets absorb light
(d) The refractive index of fog is extremely high
(e) None of the above

Q6. Which of the following statements is correct?
(a) Most of food preparations are colloidal in nature
(b) Most drugs, which are insoluble in water, are administered as colloidal dispersions
(c) Latex is colloidal solution of negatively charged colloidal rubber particles
(d) All of the above
(e) None of the above

Q7. Oils are purified by
(a) Fractional distillation
(b) Steam distillation
(c) Crystallisation
(d) Vacuum distillation
(e) None of the above

Q8. What would be the best choice for window material to keep the outside heat away?
(a) Single-pane glass
(b) Double-pane glass without a gap in between
(c) Double-pane glass with water filled in between
(d) Double-pane glass with air in between
(e) None of the above

Q9. One feels heavier in a lift when the lift
(a) is going down steadily
(b) just begins to go up
(c) is moving up steadily
(d) descends freely
(e) None of the above

Q10. The lift of an air plane is based on
(a) Torricelli’s theorem
(b) Bernoulli’s theorem
(c) Law of gravitation
(d) Conservation of linear momentum
(e) None of the above

Solutions

S1.Ans. (a)
Sol. Potassium bromide is used as sedative.

S2.Ans. (a)
Sol. Marie Curie win her two different Noble prizes in two different category i.e., Physics and Chemistry.

S3.Ans. (d)
Sol. Fluorescent coating on the glass is the secondary source of light in a fluorescent lamp.

S4.Ans. (d)
Sol. Decantation is a process of separation of insoluble solids from liquid. The suspension of solid particles in liquid is allowed to stand for some time. The solid particles then settle down at the bottom of the container and clean water goes up.

S5.Ans. (b)
Sol. The rays of light are scattered by the fog droplets due to which it become difficult to see through fog.

S6.Ans. (d)
Sol. Colloids are a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The substances are present as larger particles than those found in solution, but are too small to be seen with a microscope.

S7.Ans. (b)
Sol. Oils are purified by steam distillation. In steam distillation process steam is bubbled through a heated mixture of raw material. Some of the target components will vaporize which are coded and condensed yielding a layer of oil and a layer of water.

S8.Ans. (d)
Sol. To keep the outside heat away, windows of double-pane glass with air in between is the best choice because air is the bad conductor of heat.

S9.Ans. (b)
Sol. One feels heavier in a lift when the lift just begins to go up because our body gains inertia from the position of rest and pushes up against the gravity so here the weight becomes zero and our mass makes us feel heavier.

S10.Ans. (b)
Sol. The lift of an air plane is based on Bernoulli’s theorem. Bernoulli’s theorem implies, therefore, that if the fluid flows horizontally so that no change in gravitational potential energy occurs, then a decrease in fluid pressure is associated with an increase in fluid velocity.