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1. Pick the odd one out.
- (a) Virus
- (b) Mammal
- (c) Bacterium
- (d) Fungus

2. Which of these is not obtained by refining of petroleum?
- (a) LPG
- (b) CNG
- (c) Diesel
- (d) Petrol

3. The animals found in a particular region are known as
- (a) Endemic species
- (b) Endangered species
- (c) Flora
- (d) Fauna

4. After fertilization, the zygote gets implanted in
- (a) The vagina
- (b) The ovary
- (c) The oviduct
- (d) The wall of the uterus

5. Which zone in a candle flame gives out the maximum light?
- (a) Dark zone
- (b) Non-luminous zone
- (c) Blue zone
- (d) Luminous zone

6. A woman is no longer reproductive after the occurrence of
- (a) Menstrual cycle
- (b) Menarche
- (c) Menopause
- (d) Ovulation

7. Which of these organelles contains chlorophyll?
- (a) Mitochondria
- (b) Plastids
- (c) Golgi bodies
- (d) Vacuoles

8. Which of these is plated on iron to prevent it from reacting chemically?
- (a) Chromium
- (b) Tin
- (c) Silver
- (d) Gold

9. Friction can be increased by
- (a) Ball bearings between the two surfaces
- (b) Making the surface rough
- (c) Lubricating the surfaces
- (d) Using streamlined shapes

10. The Rabi crop is harvested in
- (a) October
- (b) December
- (c) March
- (d) June

11. In which of these animals does the young that hatches out of the egg look very different from the adult animal?
- (a) Frog
- (b) Butterfly
- (c) Mosquito
- (d) All of these

12. Which of these causes water pollution?
- (a) Sewage
- (b) Industrial waste
- (c) Fertilizers and pesticides
- (d) All of these

13. Myopia is corrected by using spectacles with
- (a) Convex lenses
- (b) Concave lenses
- (c) Glass slabs
- (d) Prisms

Answer :

Answer:

1 -( a ) virus

2- ( b) CNG

3 - (d) Fauna

4 - (d)

5- d

6 - c

7 - b

8 - b

9 - b

10 - c

11- d

12 - d

13 - b

Explanation:

1 - The odd one out is (a) Virus

Mammal, Bacterium, and Fungus are all living organisms that can grow, reproduce, and carry out metabolic activities.

Virus, on the other hand, is not considered a fully living organism because it cannot reproduce or carry out metabolism on its own; it requires a host cell to replicate.

Thus, a virus is fundamentally different from the other three options.

2 - LPG (Liquefied Petroleum Gas), Diesel, and Petrol are all obtained by refining crude oil (petroleum) in refineries.

CNG (Compressed Natural Gas) is primarily derived from natural gas, which is found in underground reservoirs along with petroleum but is not a direct product of petroleum refining.

Thus, CNG is the odd one out as it is not obtained from petroleum refining.

3 - Fauna refers to the animals found in a particular region.

Flora refers to the plants found in a particular region.

Endemic species are species that are native to a specific location and not found naturally elsewhere.

Endangered species are species that are at risk of extinction.

Thus, fauna is the correct term for animals found in a specific region.

4 -After fertilization, the zygote undergoes multiple cell divisions and develops into a blastocyst. This blastocyst travels through the oviduct (fallopian tube) and gets implanted in the wall of the uterus (endometrium), where it continues to develop into an embryo and later a fetus.

Vagina: Involved in childbirth and sperm deposition but not implantation.

Ovary: Produces eggs but does not support implantation.

Oviduct (Fallopian tube): Site of fertilization but not implantation.

Thus, the uterine wall is the correct answer.

5 -

1. Dark Zone – Near the wick, where there is incomplete combustion.

2. Non-luminous Zone (Blue Zone) – At the base, where complete combustion occurs, but it emits less light.

3. Luminous Zone – The bright yellow-orange part, where incomplete combustion of wax vapors happens, producing glowing carbon particles.

4. Outer Zone (Blue Zone) – The hottest part, where complete combustion occurs, but it is not the brightest.

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Rewritten by : Barada