General Science problems
- 1. How does common salt help in separating soap from the solution after saponification?
Options- A. By decreasing density of Soap
- B. By decreasing solubility of Soap
- C. By increasing density of Soap
- D. By increasing solubility of Soap Discuss
Correct Answer: By decreasing solubility of Soap
- 2. Detergents used for cleaning clothes and utensils contain?
Options- A. bicarbonates
- B. bismuthates
- C. sulphonates
- D. nitrates Discuss
Correct Answer: sulphonates
- 3. Gypsum is added to cement clinker to
Options- A. increase the tensile strength of cement
- B. decrease the rate of setting of cement
- C. facilitate the formation of colloidal gel
- D. bind the particles of calcium silicate Discuss
Correct Answer: decrease the rate of setting of cement
- 4. Wood is the main raw material for the manufacture of
Options- A. paint
- B. paper
- C. ink
- D. gun powder Discuss
Correct Answer: paper
- 5. Which one of the following types of waves are used in a night vision apparatus?
Options- A. Radio waves
- B. Microwaves
- C. Infra-red waves
- D. None of the above Discuss
Correct Answer: Infra-red waves
- 6. The blue colour of the clear sky is due to
Options- A. Diffraction of light
- B. Dispersion of light
- C. Reflection of light
- D. Refraction of light Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank PO
Correct Answer: Dispersion of light
Explanation:
A clear cloudless day-time sky is blue because molecules in the air dissipate blue light from the sun more than they dissipate red light. When we look towards the sun at sunset, we see red and orange hues on the grounds because the blue light has been scattered out and away from the line of sight.
- 7. As you go down into a well, your weight
Options- A. increases slightly
- B. decreases slightly
- C. remains exactly the same
- D. None of the above Discuss
Correct Answer: decreases slightly
- 8. The weight of an object will be minimum when it is placed at ?
Options- A. The North Pole
- B. The South Pole
- C. The Equator
- D. The center of the Earth Also asked in: AIEEE, Bank Exams, CAT, Bank PO
Correct Answer: The center of the Earth
Explanation:
The weight of an object is minimum when it is placed at the center of the earth because when an object is in the center, it experiences gravitational pull from all directions.
- 9. What does airbag, used for safety of car driver, contain?
Options- A. Sodium bicarbonate
- B. Sodium azide
- C. Sodium nitrite
- D. Sodium peroxide Discuss
Correct Answer: Sodium azide
- 10. In fireworks, the green flame is produced because of
Options- A. Sodium
- B. Potassium
- C. Barium
- D. Mercury Discuss
Correct Answer: Barium
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