McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) , Uncategorized topics .
| 151. |
The soap can be hardened by |
| A. | adding sodium carbonate or sodium silicate during its manufacture |
| B. | adding sodium chloride |
| C. | adding potassium hydroxide |
| D. | adding animal fat and coconut oil |
| Answer» A. adding sodium carbonate or sodium silicate during its manufacture | |
| 152. |
Bleaching powder is |
| A. | CaO2Cl |
| B. | CaOCl2 |
| C. | CaClO2 |
| D. | CaCl2+O2 |
| Answer» B. CaOCl2 | |
| 153. |
Plaster of Paris is obtained by heating |
| A. | gypsum |
| B. | limestone |
| C. | sodium carbonate |
| D. | calcium sulphate |
| Answer» A. gypsum | |
| 154. |
The common name of sodium bicarbonate is |
| A. | lime |
| B. | baking powder |
| C. | baking soda |
| D. | washing soda |
| Answer» B. baking powder | |
| 155. |
Slaked lime reacts with chlorine to give |
| A. | baking soda |
| B. | washing soda |
| C. | bleaching powder |
| D. | cement |
| Answer» C. bleaching powder | |
| 156. |
The main constituent of cement is |
| A. | SiO2 |
| B. | CaO |
| C. | CaSO4 |
| D. | Al2O3 |
| Answer» A. SiO2 | |
| 157. |
The real bleaching agent present in bleaching powder is |
| A. | chlorine |
| B. | oxygen |
| C. | oxygen |
| D. | CaO |
| Answer» A. chlorine | |
| 158. |
Cake does not taste bitter due to presence of |
| A. | sodium carbonate |
| B. | tartaric acid |
| C. | citric acid |
| D. | sugar |
| Answer» B. tartaric acid | |
| 159. |
What is obtained on adding lime to H2O? |
| A. | lime |
| B. | limestone |
| C. | slaked lime |
| D. | quicklime |
| Answer» C. slaked lime | |
| 160. |
Which of the following is different from others? |
| A. | speed |
| B. | density |
| C. | force |
| D. | time |
| Answer» D. time | |
| 161. |
The amount of substance in the SI system of units is represented by |
| A. | candela |
| B. | mole |
| C. | weight |
| D. | kilogram |
| Answer» B. mole | |
| 162. |
The SI unit of temperature is |
| A. | Kelvin |
| B. | second |
| C. | mole |
| D. | candela |
| Answer» A. Kelvin | |
| 163. |
The National Physical Laboratory is situated at |
| A. | Kolkata |
| B. | New Delhi |
| C. | Bombay |
| D. | None of these |
| Answer» B. New Delhi | |
| 164. |
The SI unit of electric current is |
| A. | ampere |
| B. | candela |
| C. | mole |
| D. | none of these |
| Answer» A. ampere | |
| 165. |
How many fundamental units are present in the SI system of units? |
| A. | 5 |
| B. | 6 |
| C. | 7 |
| D. | 3 |
| Answer» C. 7 | |
| 166. |
Which of the following physical quantities is different from others? |
| A. | speed |
| B. | distance |
| C. | energy |
| D. | average velocity |
| Answer» D. average velocity | |
| 167. |
The unit for the rate of change of velocity will be |
| A. | m/s |
| B. | m/s2 |
| C. | Ns |
| D. | N/s |
| Answer» B. m/s2 | |
| 168. |
The velocity of a body at rest is always |
| A. | unity |
| B. | negative |
| C. | zero |
| D. | infinite |
| Answer» C. zero | |
| 169. |
Impulse is |
| A. | a scalar quantity |
| B. | a vector quantity |
| C. | neither a scalar nor a vector |
| D. | sometimes a scalar and sometimes a vector |
| Answer» B. a vector quantity | |
| 170. |
The weight of a body would not be zero |
| A. | at the centre of the earth |
| B. | during a free fall |
| C. | in interplanetary space |
| D. | on a frictionless surface |
| Answer» D. on a frictionless surface | |
| 171. |
A man is standing on a boat in still water. If he walks towards the shore the boat will |
| A. | move away from the shore |
| B. | remain stationary |
| C. | move towards the shore |
| D. | sink |
| Answer» A. move away from the shore | |
| 172. |
If action and reaction were to act on the same body, |
| A. | the resultant would be zero |
| B. | the body would not move at all |
| C. | both (a) and (b) are correct |
| D. | neither (a) nor (b) is correct |
| Answer» C. both (a) and (b) are correct | |
| 173. |
The combined effect of mass and velocity is taken into account by a physical quantity called |
| A. | torque |
| B. | moment of force |
| C. | momentum |
| D. | moment of momentum |
| Answer» C. momentum | |
| 174. |
Momentum is a measure of |
| A. | weight |
| B. | mass |
| C. | quantity of motion |
| D. | velocity |
| Answer» C. quantity of motion | |
| 175. |
A rocket works on the |
| A. | first law of motion |
| B. | second law of motion |
| C. | third law of motion |
| D. | law of conservation of energy |
| Answer» C. third law of motion | |
| 176. |
When a bicycle travels on a rough surface, its speed |
| A. | increases |
| B. | decreases |
| C. | remains the same |
| D. | none of these |
| Answer» B. decreases | |
| 177. |
It is difficult to walk on ice because of |
| A. | absence of friction |
| B. | absence of inertia |
| C. | more inertia |
| D. | more friction |
| Answer» A. absence of friction | |
| 178. |
The law which defines force is |
| A. | Newton’s third law of motion |
| B. | Newton’s first law of motion |
| C. | Newton’s second law of motion |
| D. | Newton’s law of gravitation |
| Answer» B. Newton’s first law of motion | |
| 179. |
Friction between any two objects is due to |
| A. | attraction between them |
| B. | repulsion between them |
| C. | some adhesive forces between them |
| D. | irregularities on the surfaces |
| Answer» D. irregularities on the surfaces | |
| 180. |
Pascal is the unit for |
| A. | pressure |
| B. | thrust |
| C. | buoyant force |
| D. | None of these |
| Answer» A. pressure | |
| 181. |
The mercury barometer was invented by |
| A. | Celsius |
| B. | Fahrenheit |
| C. | Torricelli |
| D. | Bernoulli |
| Answer» C. Torricelli | |
| 182. |
The buoyant force depends on |
| A. | depth of a liquid |
| B. | colour of a liquid |
| C. | density of liquid |
| D. | none of these |
| Answer» C. density of liquid | |
| 183. |
The hot air balloon rises because it is |
| A. | denser |
| B. | less dense |
| C. | equally dense |
| D. | the given statement is wrong |
| Answer» B. less dense | |
| 184. |
A boat full of iron nails is floating on water in a lake. When the iron nails are removed, the water level |
| A. | rises |
| B. | falls |
| C. | remains the same |
| D. | nothing can be said |
| Answer» B. falls | |
| 185. |
An ice cube is floating in a glass of water. What happens to the water level when the ice melts? |
| A. | rises |
| B. | falls |
| C. | remains same |
| D. | first rises and then falls |
| Answer» C. remains same | |
| 186. |
The branch of physics which deals with the study of fluids in motion is called |
| A. | dynamics |
| B. | hydrostatics |
| C. | hydrodynamics |
| D. | none of these |
| Answer» C. hydrodynamics | |
| 187. |
Pressure is a |
| A. | scalar quantity |
| B. | vector quantity |
| C. | normal force |
| D. | all the above are wrong |
| Answer» A. scalar quantity | |
| 188. |
The upward force acting on the body immersed in a fluid is called |
| A. | hydrostatic pressure |
| B. | buoyant force |
| C. | true weight |
| D. | net force |
| Answer» B. buoyant force | |
| 189. |
Work done upon a body is |
| A. | a vector quantity |
| B. | a scalar quantity |
| C. | always positive |
| D. | always negative |
| Answer» B. a scalar quantity | |
| 190. |
the flowing water of a river possesses ______ energy. |
| A. | gravitational |
| B. | potential |
| C. | electrical |
| D. | kinetic |
| Answer» D. kinetic | |
| 191. |
The unit of power is |
| A. | watt per second |
| B. | joule |
| C. | kilo joule |
| D. | watt |
| Answer» D. watt | |
| 192. |
A bird flying in the sky has |
| A. | K.E. only |
| B. | P.E. only |
| C. | neither K.E. nor P.E. |
| D. | both K.E. and P.E. |
| Answer» D. both K.E. and P.E. | |
| 193. |
In summer, the clocks |
| A. | become slow |
| B. | become fast |
| C. | gives correct time |
| D. | lose time |
| Answer» A. become slow | |
| 194. |
Therm is the unit of |
| A. | heat |
| B. | temperature |
| C. | thermometry |
| D. | work |
| Answer» A. heat | |
| 195. |
Heat flows as a result of difference of |
| A. | temperatures |
| B. | weights |
| C. | masses |
| D. | none of these |
| Answer» A. temperatures | |
| 196. |
The first thermometer was developed by |
| A. | Joule |
| B. | Fahrenheit |
| C. | Galileo |
| D. | Watt |
| Answer» C. Galileo | |
| 197. |
Soda bottles are made of thick glass so that they can withstand the |
| A. | pressure in summer |
| B. | temperature in summer |
| C. | decrease in viscosity |
| D. | increase in potential energy |
| Answer» A. pressure in summer | |
| 198. |
Evaporation is the process of changing liquid into vapour |
| A. | at any temperature |
| B. | above its boiling point |
| C. | at its boiling point |
| D. | below its boiling point |
| Answer» D. below its boiling point | |
| 199. |
The period of pendulum depends upon |
| A. | mass |
| B. | length |
| C. | amplitude |
| D. | energy |
| Answer» B. length | |
| 200. |
Potential energy of the bob is maximum |
| A. | at the mean position |
| B. | at the extreme position |
| C. | between the mean position and extreme positions |
| D. | none of these |
| Answer» B. at the extreme position | |
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