| Science (Practice Test-3) |
1. Which of them are liquid elements?
- CI
- Br
- Na
- W
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] Br [/su_spoiler]
2. Submarine is based on-
- Newton’s law
- Archmedies law
- Low of Einistein
- Pascal’s law
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] Archmedies law [/su_spoiler]
3. The ratio of velocity of two bodies is 1 : 4, what will be the ratio of its kinetic energies.
- 1 : 4
- 1 : 8
- 4 : 1
- 1 : 2
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] 1 : 8 [/su_spoiler]
4. The temprature of the surface of the sun is-
- 600° C
- 600° K
- 60,000° C
- 600°
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] 600° C [/su_spoiler]
5. Rusting in iron is-
- Oxydation
- Addition
- Substitution
- Polymerisation
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] Oxydation [/su_spoiler]
6. Which of the following moleculer contains a double bond?
- N₂
- C₂H₄
- C₂
- CH₄
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] C₂H₄ [/su_spoiler]
7. Common salt can be obtained from?
- Rock salt
- Salt lake
- Rain water
- Lime stone
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] Rock salt [/su_spoiler]
8. The process for the change of a solid directly into its vapour is called ?
- Equaporation
- Condensation
- Sublimation
- Boiling point
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] Sublimation [/su_spoiler]
9. Which of the following is a compound?
- Steel
- Brass
- lodine
- Iron Solphide
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] Iron Solphide [/su_spoiler]
10. Which industry utilises sodium silicate ?
- Soap industry
- Fertilizer industry
- Cement industry
- Cosmetic industry
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] Cement industry [/su_spoiler]