General-Studies Quiz For FCI Phase I 2022- 7th December

Q1. While tinning of brass utensils, the ammonium chloride powder used to clean the hot utensil produces fumes of
(a) ammonia
(b) carbon monoxide
(c) hydrochloric acid
(d) ammonia and hydrochloric acid
(e) None of the above

Q2. Why is it difficult to measure the coefficient of expansion of a liquid than solid?
(a) Liquids tend to evaporate at all temperatures
(b) Liquids conduct more heat
(c) Liquids expand too much when heated
(d) Their containers also expand when heated
(e) None of the above

Q3. Normal adult human male has
(a) 10 g of haemoglobin/100 g of blood
(b) 14 g of haemoglobin/100 g of blood
(c) 18 g of haemoglobin/100 g of blood
(d) 24 g of haemoglobin/100 g of blood
(e) None of the above

Q4. If an object moves with constant velocity then which one of the following statements is NOT correct?
(a) Its motion is along a straight line
(b) Its speed changes with time
(c) Its acceleration is zero
(d) its displacement increases linearly with time
(e) None of the above

Q5. Whether an object will float or sink in a liquid, depends on
(a) mass of the object only
(b) mass of the object and density of liquid only
(c) difference in the densities of the object and liquid
(d) mass and shape of the object only] (e) None of the above

Q6. In the process of electroplating a utensil with zinc:
(a) the utensil is made the cathode
(b) pure zinc is made the anode
(c) the utensil is made the cathode and pure zinc is made the anode
(d) the utensil is made the anode and pure zinc is made the cathode
(e) None of the above

Q7. Natural radioactivity was discovered by
(a) Rutherford
(b) Becquerel
(c) Curie
(d) Schmidt
(e) None of the above

Q8. Baking soda is
(a) sodium carbohydrate
(b) sodium bicarbonate
(c) sodium sulphate
(d) sodium hydroxide
(e) None of the above

Q9. 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

Q10. 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

Solutions

S1.Ans. (d)
Sol. Ammonium chloride decomposes into ammonia and hydrogen chloride gas. NH4Cl → NH3 + HCl It produces fumes of ammonia and hydrochloric acid.

S2.Ans. (d)
Sol. Liquids expand for the same reason, but because the bonds between separate molecules are usually less tight they expand more than solids. This is the principle behind liquid-in-glass thermometers.

S3.Ans. (b)
Sol. Normal range of Haemoglobin in adult human male is 14-17 g/dl of blood.

S4.Ans. (a)
Sol. An object has constant velocity means that it is moving along a straight line, and as every second of time goes by, the object travels through the same number of meters.

S5.Ans. (c)
Sol. Whether an object will float or sink in a liquid, depends on difference in the densities of the object and liquid.

S6.Ans. (c)
Sol. The zinc serves as a sacrificial anode, so the utensil is made the cathode and pure zinc is made the anode.

S7.Ans. (b)
Sol. Natural radioactivity was discovered by Henri Becquerel in 1896 by using naturally fluorescent minerals to study properties of X-rays.

S8.Ans. (b)
Sol. Baking soda is sodium bicarbonate with chemical formula NaHCO3. It is primarily used in baking industries as a leavening agent.

S9.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.

S10.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.