McqMate
| 101. |
Random Movement of particles was discovered by |
| A. | Robert Brown |
| B. | E. Goldstein |
| C. | James Chadwick |
| D. | Wilhein Weins |
| Answer» A. Robert Brown | |
| 102. |
Scattering of light by colloidal particles is known as |
| A. | Tyndall effect |
| B. | Brownian motion |
| C. | reflection |
| D. | rectilinear propagation |
| Answer» A. Tyndall effect | |
| 103. |
Which of the following non-metals occur in liquid form at room temperature? |
| A. | bromine |
| B. | carbon |
| C. | sulphur |
| D. | chlorine |
| Answer» A. bromine | |
| 104. |
Brass is an example of a ______ |
| A. | homogenous compound |
| B. | homogenous mixture |
| C. | heterogeneous mixture |
| D. | heterogeneous compound |
| Answer» B. homogenous mixture | |
| 105. |
Which of the following is not a noble gas? |
| A. | helium |
| B. | neon |
| C. | argon |
| D. | hydrogen |
| Answer» D. hydrogen | |
| 106. |
Which of the following acids is present in sour milk? |
| A. | glycolic acid |
| B. | lactic acid |
| C. | citrus acid |
| D. | tartaric acid |
| Answer» B. lactic acid | |
| 107. |
Which of the following acids is called the king of the acids? |
| A. | acetic acid |
| B. | phosphoric acid |
| C. | oxalic acid |
| D. | sulphuric acid |
| Answer» D. sulphuric acid | |
| 108. |
The sharp pain caused by the sting of an ant is due to |
| A. | malic acid |
| B. | nitric acid |
| C. | formic acid |
| D. | lactic acid |
| Answer» C. formic acid | |
| 109. |
Vitamin C is an organic acid known as |
| A. | ascorbic acid |
| B. | citrus acid |
| C. | glycolic acid |
| D. | acetic acid |
| Answer» A. ascorbic acid | |
| 110. |
Soaps are sodium salts of |
| A. | mineral acids |
| B. | fatty acids |
| C. | bases |
| D. | carbonic acid |
| Answer» B. fatty acids | |
| 111. |
Sodium bicarbonate is also known as |
| A. | washing soda |
| B. | baking soda |
| C. | glauber’s salt |
| D. | lime soda |
| Answer» B. baking soda | |
| 112. |
Which of the following is not a property of acids? |
| A. | all acids have a sour taste |
| B. | acids turn blue litmus red |
| C. | acids turn red litmus blue |
| D. | all acids form H+ |
| Answer» C. acids turn red litmus blue | |
| 113. |
Which of the following acid is used in fire extinguishers? |
| A. | hydrochloric acid |
| B. | sulphuric acid |
| C. | nitric acid |
| D. | oxalic acid |
| Answer» B. sulphuric acid | |
| 114. |
Which of the following acid is used by goldsmiths for cleaning gold and silver ornaments? |
| A. | HCL |
| B. | H2SO4 |
| C. | HNO3 |
| D. | H3PO4 |
| Answer» C. HNO3 | |
| 115. |
Which order of relative size amongst the following is incorrect? |
| A. | Li < Na < K |
| B. | C < Si < Al |
| C. | Mg > Al < Na |
| D. | F < Cl < Br |
| Answer» C. Mg > Al < Na | |
| 116. |
Which one of the following has the smallest size? |
| A. | Al |
| B. | Al+ |
| C. | Al+2 |
| D. | Al+3 |
| Answer» D. Al+3 | |
| 117. |
Which of the following is an example of fossil fuel? |
| A. | coal gas |
| B. | coke |
| C. | natural gas |
| D. | producer gas |
| Answer» C. natural gas | |
| 118. |
When steam is passed over hot coke, it produces |
| A. | producer gas |
| B. | synthesis gas |
| C. | tear gas |
| D. | coal gas |
| Answer» B. synthesis gas | |
| 119. |
Producer gas is a mixture of |
| A. | carbon monoxide and nitrogen gas |
| B. | carbon monoxide and hydrogen gas |
| C. | carbon monoxide and water vapour |
| D. | carbon monoxide and nitrous oxide |
| Answer» A. carbon monoxide and nitrogen gas | |
| 120. |
Water gas consists of |
| A. | water vapour and coal dust |
| B. | a mixture of carbon monoxide and hydrogen |
| C. | a mixture of carbon monoxide and the nitrogen |
| D. | water vapour and methane. |
| Answer» B. a mixture of carbon monoxide and hydrogen | |
| 121. |
The gas used in the welding and cutting of metals is |
| A. | ethane |
| B. | ethene |
| C. | ethyne |
| D. | propene |
| Answer» C. ethyne | |
| 122. |
Coal with largest C content is |
| A. | anthracite |
| B. | peat |
| C. | lignite |
| D. | bituminous |
| Answer» A. anthracite | |
| 123. |
An allotropic form of carbon used for cutting and drilling is |
| A. | charcoal |
| B. | bone charcoal |
| C. | graphite |
| D. | diamond |
| Answer» D. diamond | |
| 124. |
Cinnabar is an ore of |
| A. | Pb |
| B. | Zn |
| C. | Hg |
| D. | Cu |
| Answer» C. Hg | |
| 125. |
Which of them is not an ore of silver? |
| A. | Ag2S |
| B. | AgNO3 |
| C. | AgCl |
| D. | None of these |
| Answer» D. None of these | |
| 126. |
Which of the following alloys contains Tin? |
| A. | brass |
| B. | solder |
| C. | duralumin |
| D. | steel |
| Answer» B. solder | |
| 127. |
An amalgam of metal has which other element? |
| A. | C |
| B. | Ag |
| C. | Mg |
| D. | Hg |
| Answer» D. Hg | |
| 128. |
Gold is alloyed with which metal to make it harder? |
| A. | Cu |
| B. | Hg |
| C. | Ag |
| D. | C |
| Answer» A. Cu | |
| 129. |
The most abundant element in the universe is |
| A. | helium |
| B. | oxygen |
| C. | silicon |
| D. | hydrogen |
| Answer» B. oxygen | |
| 130. |
The most abundant metal on the earth is |
| A. | iron |
| B. | gold |
| C. | aluminium |
| D. | copper |
| Answer» C. aluminium | |
| 131. |
Aluminium is extracted from |
| A. | hematite |
| B. | bauxite |
| C. | calamine |
| D. | magnetite |
| Answer» B. bauxite | |
| 132. |
Metallurgy is the process of |
| A. | extracting metals from the Ore |
| B. | roasting the Ore |
| C. | liquefaction of nitrogen |
| D. | adding carbon to the Ore in blast furnace |
| Answer» A. extracting metals from the Ore | |
| 133. |
A metal, which melts on the palm |
| A. | potassium |
| B. | sodium |
| C. | gallium |
| D. | zinc |
| Answer» B. sodium | |
| 134. |
The process of protecting iron by coating with Zinc. |
| A. | smelting |
| B. | galvanising |
| C. | rusting |
| D. | corrosion |
| Answer» B. galvanising | |
| 135. |
A lustrous non-metal is |
| A. | diamond |
| B. | iodine |
| C. | sulphur |
| D. | phosphorus |
| Answer» B. iodine | |
| 136. |
Sodium is a |
| A. | silvery white and very soft metal |
| B. | colourless and hard metal |
| C. | silvery white and very hard metal |
| D. | colourless and very soft metal |
| Answer» A. silvery white and very soft metal | |
| 137. |
Which of the following is used for making magnets? |
| A. | duralumin |
| B. | magnalium |
| C. | bronze |
| D. | alnico |
| Answer» D. alnico | |
| 138. |
What should be added to pure iron to make stainless steel? |
| A. | nickel and cobalt |
| B. | cadmium and chromium |
| C. | nickel and cadmium |
| D. | chromium and nickel |
| Answer» D. chromium and nickel | |
| 139. |
The red or Orange coating that forms on the surface of iron when exposed to air and moisture for some time is called |
| A. | galvanization |
| B. | electroplating |
| C. | rust |
| D. | reduction |
| Answer» C. rust | |
| 140. |
The tip of the lead pencil is made of |
| A. | lead |
| B. | graphite |
| C. | zinc |
| D. | charcoal |
| Answer» B. graphite | |
| 141. |
The most abundant element in the sun’s atmosphere is |
| A. | xenon |
| B. | argon |
| C. | hydrogen |
| D. | oxygen |
| Answer» C. hydrogen | |
| 142. |
Ordinary glass is a mixture of |
| A. | sodium silicate, Calcium silicate |
| B. | sodium silicate, Calcium silicate and Silica |
| C. | sodium silicate and Silica |
| D. | none of the above |
| Answer» A. sodium silicate, Calcium silicate | |
| 143. |
Glass used for making wind screens of automobiles is |
| A. | hard glass |
| B. | photo chromatic glass |
| C. | safety glass |
| D. | optical glass |
| Answer» C. safety glass | |
| 144. |
Annealing is done to |
| A. | increase brittleness |
| B. | increase Transparency |
| C. | decrease brittleness |
| D. | increase refractive index |
| Answer» C. decrease brittleness | |
| 145. |
Steel is preferred over iron in construction of ships because |
| A. | melting point of steel is higher than Iron |
| B. | steel is more uniform than Iron |
| C. | steel does not rust |
| D. | tensile strength of steel is not high |
| Answer» C. steel does not rust | |
| 146. |
The carbon content in steel is |
| A. | 0.1 – 5.0% |
| B. | 2.0 – 2.5% |
| C. | 0.1 – 1.5% |
| D. | less than 0.1 |
| Answer» C. 0.1 – 1.5% | |
| 147. |
Permanent magnets can be made from |
| A. | Ni steel |
| B. | cobalt steel |
| C. | stainless steel |
| D. | wrought iron |
| Answer» D. wrought iron | |
| 148. |
The main constituents of cement are: |
| A. | calcium oxide, silicon dioxide, Aluminium oxide |
| B. | calcium oxide, Iron oxide, Sulphur dioxide |
| C. | magnesium oxide, Silicon dioxide, Aluminium oxide |
| D. | none of these |
| Answer» A. calcium oxide, silicon dioxide, Aluminium oxide | |
| 149. |
A thick paste of cement, sand and water is called |
| A. | concrete |
| B. | mortar |
| C. | slurry |
| D. | moderator |
| Answer» B. mortar | |
| 150. |
The process of making soap by the hydrolysis of fats and oils with alkalis is called |
| A. | hydrolysis |
| B. | saponification |
| C. | esterification |
| D. | none of these |
| Answer» B. saponification | |
| 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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