GK-CDS-2009 MCQ Question and Answer
GK-CDS-2009 MCQ Question and Answer
131. The characteristic odour of Garlic is due to which one of the following ?
- Chlorine - containing compounds
- Fluorine - containing compounds
- Nitrogen - containing compounds
- Sulphur - containing compounds
132. What does airbag, used for safety of car driver, contain ?
- Sodium bicarbonate
- Sodium Azide
- Sodium nitrite
- Sodium peroxide
133. Which colour of heat radiation represents the highest temperature ?
- Blood red
- Dark cherry
- Salmon
- White
134. . Which one of the following is correct ?
A concrete wall generally.
A concrete wall generally.
- Only reflects sound
- Only absorbs sound
- Only transmits sound
- Absorbs and transmits sound
135. What would be the best choice for window material to keep the outside heat away ?
- Single-pane glass
- Double-pane glass without a gap in between
- Double-pane glass with water filled in between
- Double-pane glass with air in between
137. with the normal at the point of incidence. °38. A ray of light is incident on a plane mirror at an angle 30 The ray will be deviated from its incidence direction by what angle ?
- 30°
- 60°
- 120°
- None of these
138. Who gave the first evidence of the Big-Bang theory ?
- Edwin Hubble
- Albert Einstein
- S. Chandrasekhar
- Stephen Hawking
139. The density of water varies with temperature which helps the aquatic animals to live in cold water. At what temperature is the density of water maximum ?
- 1°C
- 2°C
- 3°C
- 4°C
140. Why is it difficult to see through fog ?
- Rays of light suffer total internal reflection from the fog droplets
- Rays of light are scattered by the fog droplets
- Fog droplets absorb light
- The refractive index of fog is extremely high