JKSSB GENERAL SCIENCE MOCK TEST – 6
(Latest JKSSB Pattern | Moderate to High Level)
Time: 20 Minutes
Maximum Marks: 20
1. A satellite revolves around the Earth because:
A) The Earth's magnetic field attracts it.
B) Gravitational force provides the necessary centripetal force.
C) The atmosphere pushes it around the Earth.
D) It has no weight in space.
2. Match the following instruments with the quantities they measure.
| Instrument | Measures |
|---|---|
| i. Lactometer | a. Atmospheric pressure |
| ii. Hydrometer | b. Density of milk |
| iii. Barometer | c. Relative humidity |
| iv. Hygrometer | d. Relative density of liquids |
Choose the correct option.
A) i-b, ii-d, iii-a, iv-c
B) i-d, ii-b, iii-c, iv-a
C) i-b, ii-a, iii-d, iv-c
D) i-c, ii-d, iii-a, iv-b
3. Which of the following statements regarding nuclear energy are correct?
I. Uranium-235 is commonly used as nuclear fuel.
II. Nuclear fission releases enormous energy.
III. Nuclear power plants emit very low carbon dioxide during operation.
IV. Radioactive waste management is a major challenge.
A) Only I and II
B) Only II and III
C) Only I, II and IV
D) I, II, III and IV
4. Which of the following is NOT a renewable source of energy?
A) Wind Energy
B) Solar Energy
C) Coal
D) Biomass
5. Which of the following metals is used for galvanizing iron?
A) Copper
B) Zinc
C) Tin
D) Aluminium
6. Which of the following statements regarding corrosion are correct?
I. Rusting is a type of corrosion.
II. Moisture accelerates rusting.
III. Painting prevents corrosion.
IV. Galvanization prevents rusting.
A) Only I and II
B) Only II and III
C) Only I, II and III
D) I, II, III and IV
7. Which gas is produced when dilute hydrochloric acid reacts with iron?
A) Hydrogen
B) Oxygen
C) Chlorine
D) Carbon dioxide
8. Which of the following metals is extracted by electrolysis of its molten chloride?
A) Sodium
B) Copper
C) Iron
D) Lead
9. Which of the following ores is correctly matched?
A) Galena — Lead
B) Bauxite — Copper
C) Hematite — Aluminium
D) Cinnabar — Zinc
10. Which process converts concentrated ore into metal oxide by heating in the presence of excess oxygen?
A) Calcination
B) Roasting
C) Smelting
D) Electrolysis
11. Which of the following statements regarding respiration in plants are correct?
I. Respiration occurs throughout the day and night.
II. Oxygen is used during aerobic respiration.
III. Carbon dioxide is released during respiration.
IV. Respiration occurs in mitochondria.
A) Only I and II
B) Only II, III and IV
C) Only I, III and IV
D) I, II, III and IV
12. Which blood component helps in clotting?
A) Red Blood Cells
B) White Blood Cells
C) Platelets
D) Plasma
13. Which nitrogenous waste is mainly excreted by humans?
A) Ammonia
B) Urea
C) Uric acid
D) Creatinine
14. Which of the following gases contributes most to the greenhouse effect due to human activities?
A) Carbon dioxide
B) Oxygen
C) Nitrogen
D) Argon
15. In an ecosystem, decomposers mainly feed on:
A) Living green plants
B) Dead organic matter
C) Herbivores only
D) Carnivores only
16. Which of the following international days is observed on 5 June?
A) World Water Day
B) World Ozone Day
C) World Environment Day
D) Earth Day
17. Which of the following statements regarding Mendel's monohybrid cross are correct?
I. The phenotypic ratio in the F₂ generation is 3:1.
II. The genotypic ratio in the F₂ generation is 1:2:1.
III. The F₁ generation shows only the dominant trait.
A) Only I and II
B) Only II and III
C) Only I and III
D) I, II and III
18. Match the following.
| Animal | Group |
|---|---|
| i. Amoeba | a. Mammalia |
| ii. Frog | b. Amphibia |
| iii. Whale | c. Protista |
| iv. Cockroach | d. Arthropoda |
Choose the correct option.
A) i-c, ii-b, iii-a, iv-d
B) i-b, ii-c, iii-d, iv-a
C) i-c, ii-a, iii-b, iv-d
D) i-d, ii-b, iii-c, iv-a
19. Which of the following is known as the "amphibian of the plant kingdom"?
A) Algae
B) Bryophyta
C) Gymnosperms
D) Angiosperms
20. Which of the following statements are correct?
I. Mammals are warm-blooded.
II. Birds possess feathers.
III. Reptiles generally have a three-chambered heart (except crocodiles).
IV. Fish have a two-chambered heart.
A) Only I and II
B) Only I, II and III
C) Only II, III and IV
D) I, II, III and IV
ANSWER KEY
| Q. No. | Answer |
|---|---|
| 1 | B |
| 2 | A |
| 3 | D |
| 4 | C |
| 5 | B |
| 6 | D |
| 7 | A |
| 8 | A |
| 9 | A |
| 10 | B |
| 11 | D |
| 12 | C |
| 13 | B |
| 14 | A |
| 15 | B |
| 16 | C |
| 17 | D |
| 18 | A |
| 19 | B |
| 20 | D |