General-Studies Quiz For FCI Phase I 2022- 29th November

Q1. Cell wall of any fungus is different from plants in having
(a) cellulose
(b) chitin
(c) cholesterol
(d) glycogen
(e) None of the above

Q2. Which one of the following statements regarding haemoglobin is correct?
(a) Haemoglobin present in RBC can carry only oxygen but not carbon dioxide.
(b) Haemoglobin of RBC can carry both oxygen and carbon dioxide.
(c) Haemoglobin of RBC can carry only carbon dioxide.
(d) Haemoglobin is only used for blood clotting and not for carrying gases.
(e) None of the above

Q3. The nucleus of a singly ionized carbon atom contains
(a) 6 protons and 6 neutrons
(b) 5 protons and 6 neutrons
(c) 6 protons, 6 neutrons and 6 electrons
(d) 12 protons, 6 neutrons and 6 electrons
(e) None of the above

Q4. Which one of the following functions is not carried out by smooth endoplasmic reticulum?
(a) Transport of materials
(b) Synthesis of lipid
(c) Synthesis of protein
(d) Synthesis of steroid hormone
(e) None of the above

Q5. Which one of the following cell organelles mainly functions as storehouse of digestive enzymes?
(a) Desmosome
(b) Ribosome
(c) Lysosome
(d) Vacuoles
(e) None of the above

Q6. What happened when a hard boiled egg after shelling is immersed in saturated brine?
(a) It shrinks
(b) It grows in size
(c) Its size remains unchanged
(d) it initially grows in size and then shrinks.
(e) None of the above

Q7. Which of the following can be used for removal of stains of rust on clothes?
1. H2O2
2. Oxalic acid
3. Petrol
4. Alcohol
(a) 1 and 2
(b) 2 only
(c) 3 and 4
(d) 1, 2, 3 and 4
(e) None of the above

Q8. Why ethylene dibromide is added to petrol –
1. It increases the octane number of fuel
2. It helps in elimination of lead oxide
3. It removes the sulphur compound in petrol
4. It serves as a substitute of tetraethyl lead
(a) 1 and 2
(b) 2 and 3
(c) 1 only
(d) 2 only
(e) None of the above

Q9. What does the airbag, used for safety of car driver, contain?
(a) Sodium bicarbonate
(b) Sodium azide
(c) Sodium nitrite
(d) Sodium peroxide
(e) None of the above

Q10. The cloudy nights are warmer than clear nights because
(a) clouds prevent escape of radiation of heat from the ground and the air.
(b) absorb sunlight in the day and radiate the same in night.
(c) clouds make the atmosphere damp and generate heat.
(d) clouds obstruct the movement of air which creates heat.
(e) None of the above

Solutions

S1.Ans. (b)
Sol. Bacterial cell walls are different from the cell walls of plants and fungi which are made of cellulose and chitin, respectively. The cell wall of bacteria is also distinct from that of Archaea, which do not contain peptidoglycan.

S2.Ans. (b)
Sol. The protein inside red blood cells that carries oxygen to cells and carbon dioxide to the lungs is haemoglobin. Oxygen enters the blood from the lungs and carbon dioxide is expelled out of the blood into the lungs. The blood serves to transport both gases. Oxygen is carried to the cells. Carbon dioxide is carried away from the cells.

S3.Ans. (a)
Sol. The charged carbon atom in a carbocation is a “sextet”, i.e. it has only six electrons in its outer valence shell instead of the eight valence electrons that ensures maximum stability (octet rule). Therefore carbocations are often reactive, seeking to fill the octet of valence electrons as well as regain a neutral charge.

S4.Ans. (c)
Sol. The smooth endoplasmic reticulum (smooth ER) is continuous with the rough ER but has few or no ribosomes on its cytoplasmic surface. Functions of the smooth ER include: Synthesis of carbohydrates, lipids, and steroid hormones.

S5.Ans. (c)
Sol. One of the key organelles involved in digestion and waste removal is lysosome. Lysosomes are organelles that contain digestive enzymes.

S6.Ans. (c)
Sol. When a hard boiled egg after shelling is immersed in saturated brine, its size remains same. Due to coagulation of inner liquid there is no flow of solvent molecules across the membrane.

S7.Ans. (d)
Sol. Oxalic acid is used as a rust removal agent because it forms a stable water soluble salt with ferric iron i.e., ferrioxalate ion.

S8.Ans. (d)
Sol. Lead oxide deposit is harmful to engine life. Thus a small amount of ethylene dibromide is added to petrol for simultaneous removal of lead oxide.

S9.Ans. (b)
Sol. Sodium azide is used in airbag, used for safety of car driver. Under room temperature, sodium azide is a stable compound. However when heated by an impulse it disintegrates to produce sodium and nitrogen. It only takes about 50-100 grams sodium azide to produce enough nitrogen gas to fill a normal air bag for driver.

S10.Ans. (a)
Sol. The cloudy nights are warmer because clouds prevent escape of radiation of heat from the ground and the air.