McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) , Uncategorized topics .
| 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 | |
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