MCQOPTIONS
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MCQOPTIONS
This section includes 2539 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1151. |
Glass is a |
| A. | Liquid |
| B. | colloid |
| C. | non-crystalline amorphous solid |
| D. | crystalline solid |
| Answer» D. crystalline solid | |
| 1152. |
1 g of a non-volatile non-electrolyte solute is dissolved in 100 g of two different solvents A and B whose ebullioscopic constants are in the ratio of 1 : 5. The ratio of the elevation in their boiling points \(\frac{{{\rm{\Delta }}{T_b}\left( A \right)}}{{{\rm{\Delta }}{T_b}\left( B \right)}}\), is: |
| A. | 5 : 1 |
| B. | 10 : 1 |
| C. | 1 : 5 |
| D. | 1 : 0.2 |
| Answer» D. 1 : 0.2 | |
| 1153. |
An atomic pile is used for |
| A. | Producing X-rays |
| B. | Conducting nuclear fission |
| C. | Conducting thermonuclear fusion |
| D. | accelerating atoms |
| Answer» C. Conducting thermonuclear fusion | |
| 1154. |
Common bulbs are filled with _________. |
| A. | Mercury |
| B. | Argon or Nitrogen gases |
| C. | Chloromethane |
| D. | Vacuum |
| Answer» C. Chloromethane | |
| 1155. |
Directions: The following items consist of two statements, Statement I and Statement II. You are to examine these two statements carefully and select the answers to these items using the code given below:Statement I: The granules of modern gunpowder (also called black powder) are typically coated with Graphite.Statement II: Graphite prevents the build-up of electrostatic charge. |
| A. | Both the statements are individually true and Statement II is the correct explanation of statement I |
| B. | Both the statements are individually true but Statement II is not the correct explanation of Statement I |
| C. | Statement I is true but Statement II is false |
| D. | Statement I is false but Statement II is true |
| Answer» B. Both the statements are individually true but Statement II is not the correct explanation of Statement I | |
| 1156. |
Match the metals (Column I) with the coordination compound(s)/enzyme(s) (Column II)Column IColumn II(a) Co(i) Wilkinson catalyst(b) Zn(ii) Chlorophyll(c) Rh(iii) Vitamin B12(d) Mg(iv) Carbonic anhydrase |
| A. | a - (i). b - (ii), c - (iii), d - (iv) |
| B. | a - (iv), b - (iii), c - (i), d - (ii) |
| C. | a - (iii), b - (iv), c - (i), d - (ii) |
| D. | a - (ii), b - (i), c - (iv), d - (iii) |
| Answer» D. a - (ii), b - (i), c - (iv), d - (iii) | |
| 1157. |
An element of atomic number 16 will belong to the _____ period of the periodic table. |
| A. | 5th |
| B. | 6th |
| C. | 3rd |
| D. | 4th |
| Answer» D. 4th | |
| 1158. |
Non-metals like sulphur and chlorine are found on the __________ of the periodic table. |
| A. | Right-hand side |
| B. | Left hand side |
| C. | Zig-zag |
| D. | Middle |
| Answer» B. Left hand side | |
| 1159. |
A unit of Van der Waals constant (a) is |
| A. | kPa |
| B. | kPa dm3 |
| C. | kPa dm3 mol-1 |
| D. | kPa dm6 mol-2 |
| Answer» E. | |
| 1160. |
A balanced chemical equation is accordance with- |
| A. | Avogadro’s law |
| B. | Law of multiple proportion |
| C. | Law of gaseous volumes |
| D. | Law of conservation of mass |
| Answer» E. | |
| 1161. |
Consider the following statements:Chlorofluorocarbons, known as ozone-depleting substances, are used1. in the production of plastic foams2. in the production of tubeless tyres3. in cleaning certain electronic components4. as pressurizing agents in aerosol cansWhich of the statements given above is/are correct? |
| A. | 1, 2 and 3 only |
| B. | 4 only |
| C. | 1, 3 and 4 only |
| D. | 1, 2, 3 and 4 |
| Answer» D. 1, 2, 3 and 4 | |
| 1162. |
________ is a pure substance. |
| A. | Air |
| B. | Sugar solution |
| C. | Methane |
| D. | Milk |
| Answer» D. Milk | |
| 1163. |
Gases used in welding are |
| A. | Oxygen and hydrogen |
| B. | Oxygen and nitrogen |
| C. | Oxygen and acetylene |
| D. | Hydrogen and acetylene |
| E. | None of the above/More than one above. |
| Answer» D. Hydrogen and acetylene | |
| 1164. |
For the reaction of H2 with I2, the rate constant is 2.5 × 10-4 dm3 mol-1 s-1 at 327°C and 1.0 dm3 mol-1 s-1 at 527°C. The activation energy for the reaction, in KJ mol-1 is:(R = 8.314 JK-1 mol-1) |
| A. | 166 |
| B. | 150 |
| C. | 72 |
| D. | 59 |
| Answer» B. 150 | |
| 1165. |
Milk of magnesia is an/a ______. |
| A. | Acid |
| B. | Antacid |
| C. | Milk |
| D. | Salt |
| Answer» C. Milk | |
| 1166. |
A substance that increases the rate of a reaction without itself being consumed is called _____________. |
| A. | Product |
| B. | Reactant |
| C. | Inhibitor |
| D. | Catalyst |
| Answer» E. | |
| 1167. |
Buckminister fullerene contains following numbers of five and six membered rings respectively : |
| A. | 12, 16 |
| B. | 12, 20 |
| C. | 20, 20 |
| D. | 20, 12 |
| Answer» B. 12, 20 | |
| 1168. |
(i) Aluminium nitrate(ii) Calcium phosphate(iii) Ferric carbonate(iv) Ammonium sulphateOut of the above compounds which two are with same number of atoms in each of their molecule? |
| A. | (i), (ii) |
| B. | (ii), (iii) |
| C. | (iii), (iv) |
| D. | (iv), (i) |
| Answer» D. (iv), (i) | |
| 1169. |
_______ gas is used for gas welding. |
| A. | Methane |
| B. | Helium |
| C. | Ethane |
| D. | Acetylene |
| Answer» E. | |
| 1170. |
How many elements are present in the 18th group of the Modern Periodic Table? |
| A. | 5 |
| B. | 2 |
| C. | 7 |
| D. | 4 |
| Answer» D. 4 | |
| 1171. |
Common salt (NaCl) is made up of: |
| A. | a strong acid and a weak base |
| B. | a weak acid and a weak base |
| C. | a weak acid and a strong base |
| D. | a strong acid and a strong base |
| Answer» E. | |
| 1172. |
Match List-I with List-II and select the correct answer using codes given below the lists:List-I(Fuel gases)List-II(Major constituents)ACNGiCarbon monoxide, HydrogenBLPGiiButane, PropaneCCoal gasiiiMethane, EthaneD Water-gasiv Hydrogen, Methane, Carbon monoxide |
| A. | A-ii, B-i, C-iii, D-iv |
| B. | A-ii, B-iv, C-iii, D-i |
| C. | A-iii, B-ii, C-iv, D-i |
| D. | A-iii, B-ii, C-i, D-iv |
| Answer» D. A-iii, B-ii, C-i, D-iv | |
| 1173. |
Finely divided ___________ is used as catalyst in Haber's process in manufacture of ammonia. |
| A. | platinum |
| B. | vanadium |
| C. | zinc |
| D. | iron |
| Answer» E. | |
| 1174. |
An open vessel at 27°C is heated until two fifth of the air (assumed as an ideal gas) in it has escaped from the vessel. Assuming that the volume of the vessel remains constant, the temperature at which the vessel has been heated is |
| A. | 750 K |
| B. | 500 K |
| C. | 750°C |
| D. | 500°C |
| Answer» C. 750°C | |
| 1175. |
Mark the correct statement for a reversible reaction - |
| A. | Catalyst catalyses the forward reaction |
| B. | Catalyst affects forward and backward reactions to the same extent. |
| C. | Catalyst catalyzes only the backward reaction |
| D. | Catalyst increases the rate of forward reaction and decreases the rate of backward reaction |
| Answer» B. Catalyst affects forward and backward reactions to the same extent. | |
| 1176. |
Aluminium surface are often 'anodized'. This means the deposition of a layer of |
| A. | chromium oxide |
| B. | aluminium oxide |
| C. | nickel oxide |
| D. | zinc oxide |
| Answer» C. nickel oxide | |
| 1177. |
Bases have_________taste and_______feel. |
| A. | Sour, soapy |
| B. | Sweet, slimy |
| C. | Salty, corrosive |
| D. | Bitter, soapy |
| Answer» E. | |
| 1178. |
Aluminum is extracted from ______. |
| A. | hematite |
| B. | bauxite |
| C. | calamine |
| D. | cinnabar |
| Answer» C. calamine | |
| 1179. |
Gobar gas mainly contains which gas? |
| A. | Carbon |
| B. | Methane |
| C. | Ethane |
| D. | Natural air |
| Answer» C. Ethane | |
| 1180. |
Number of molecules of water of crystallization in copper sulphate, sodium carbonate and Gypsum are |
| A. | 5, 10 and 2 respectively |
| B. | 10, 2 and 5 respectively |
| C. | 5, 2 and 10 respectively |
| D. | 2, 5 and 10 respectively |
| Answer» B. 10, 2 and 5 respectively | |
| 1181. |
Out of the following identify one that can be beaten up into thin sheets? |
| A. | Zinc |
| B. | Sulphur |
| C. | Oxygen |
| D. | Phosphorus |
| Answer» B. Sulphur | |
| 1182. |
Isotones have always ______. |
| A. | Same number of protons |
| B. | Same atomic number |
| C. | Same number of neutron |
| D. | Same number of proton and same number of neutron |
| Answer» D. Same number of proton and same number of neutron | |
| 1183. |
In which of the following pairs are the ions isoelectronic? |
| A. | Mg2+, Ar |
| B. | Na+, O2- |
| C. | Al3+, Cl- |
| D. | K+, Ne |
| Answer» C. Al3+, Cl- | |
| 1184. |
Nernst equation related electrode potential with |
| A. | Temperature |
| B. | Concentration |
| C. | Temperature and concentration |
| D. | Temperature and pressure |
| Answer» D. Temperature and pressure | |
| 1185. |
Match List - I with List - II and select the correct answer from the codes given below the lists : List – I (Metal) List-II (Property) A. Sodium 1. Good conductor of electricity B. Mercury 2. Liquid at room temperature C. Silver 3. Poor conductor of heat D. Lead 4. Can be easily cut with knife |
| A. | 2, B) 3, C) 1, D) 4 |
| B. | 1, B) 4, C) 3, D) 2 |
| C. | 4, B) 2, C) 1, D) 3 |
| D. | 4, B) 1, C) 2, D) 3 |
| Answer» D. 4, B) 1, C) 2, D) 3 | |
| 1186. |
Non-Bonding valence electrons are |
| A. | Involved only in the covalent bond formation. |
| B. | Involved only in ionic bond formation. |
| C. | Involved in both ionic and covalent bond formation. |
| D. | Not involved in the covalent bond formation |
| Answer» B. Involved only in ionic bond formation. | |
| 1187. |
Molecular mass of CO is ______. |
| A. | 16 |
| B. | 44 |
| C. | 32 |
| D. | 28 |
| Answer» E. | |
| 1188. |
During the change of O2 to \(O_2^ -\), the incoming electron goes to the orbital: |
| A. | π2py |
| B. | σ* 2pz |
| C. | π* 2px |
| D. | π2px |
| Answer» D. π2px | |
| 1189. |
Galvanization, a process to prevent rusting, involves use of _______ coating to steel or iron.A. NickelB. MagnesiumC. CopperD. Zinc |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 1190. |
Neutrons are present in the nucleus of all atoms, except- |
| A. | Hydrogen |
| B. | Carbon |
| C. | Oxygen |
| D. | Nitrogen |
| Answer» B. Carbon | |
| 1191. |
IUPAC name of the following compound is \(\begin{array}{*{20}{c}} {\rm C{H_3}}\\ {}\\ {} \end{array}\begin{array}{*{20}{c}} {\rm -\ CH\ - }\\ | \ \ \ \\ {\rm C{H_3}} \end{array}\begin{array}{*{20}{c}} {\rm OC{H_3}}\\ {}\\ {} \end{array}\) |
| A. | 2-methoxy-2-methyl ethane |
| B. | 2-methoxy propane |
| C. | Isopropyl methyl ether |
| D. | 1-methoxy-1-methyl ethane |
| Answer» C. Isopropyl methyl ether | |
| 1192. |
In Mendeleev’s periodic table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the periodic table later? |
| A. | Silicon |
| B. | Germanium |
| C. | Oxygen |
| D. | Chlorine |
| Answer» C. Oxygen | |
| 1193. |
At a given temperature T, gases Ne, Ar, Xe and Kr are found to deviate from ideal gas behavior. Their equation of state is given as \(p = \frac{{{\rm{RT}}}}{{{\rm{V}} - {\rm{b}}}}\) at T.Here, b is the van der Waals constant. Which gas will exhibit steepest increase in the plot of Z (compression factor) vs p? |
| A. | Xe |
| B. | Kr |
| C. | Ne |
| D. | Ar |
| Answer» B. Kr | |
| 1194. |
Hydrogen will not reduce heated |
| A. | CuO |
| B. | Fe2O3 |
| C. | Al2O3 |
| D. | SnO2 |
| Answer» D. SnO2 | |
| 1195. |
Clothes made from synthetic material are not safe to be worn while working in the kitchen because |
| A. | They absorb less water |
| B. | They make us feel hot |
| C. | They can catch fire easily |
| D. | They stick to our body |
| Answer» D. They stick to our body | |
| 1196. |
Correct statements among 1 to 4 regarding silicones are:(1) They are polymers with hydrophobic character.(2) They are biocompatible.(3) In general, they have high thermal stability and low dielectric strength.(4) Usually, they are resistant to oxidation and used as greases. |
| A. | (1), (2) and (3) only |
| B. | (1), and (2) only |
| C. | (1), (2), (3) and (4) |
| D. | (1), (2) and (4) only |
| Answer» E. | |
| 1197. |
A chemical equation is said to be balanced if number of ________. |
| A. | Atoms are the same in both sides |
| B. | Compounds are the same in both sides |
| C. | Electrons is the same in both sides |
| D. | Molecules are the same in both sides |
| Answer» B. Compounds are the same in both sides | |
| 1198. |
Atomic theory was given by ______ . |
| A. | John Dalton |
| B. | Robert Brown |
| C. | E. Rutherford |
| D. | E. Goldstein |
| Answer» B. Robert Brown | |
| 1199. |
Cleansing action of soap occurs because |
| A. | Oil and grease can be absorbed into the hydrophobic centres of soap micelles and get washed away. |
| B. | Oil and grease can be absorbed into the hydrophilic centres of soap micelles and washed away. |
| C. | Oil and grease can be absorbed into both hydrophilic and hydrophobic centres but not washed away. |
| D. | Cleansing action is not related to micelles. |
| Answer» B. Oil and grease can be absorbed into the hydrophilic centres of soap micelles and washed away. | |
| 1200. |
\({N_2}\left( g \right) + {O_2}\left( g \right) \to 2NO\left( g \right)\). The heat of reaction is 43 Kcal. What is the heat of formation of NO (g) |
| A. | 21.5 Kcal |
| B. | 43 Kcal |
| C. | 10.25 Kcal |
| D. | 86 Kcal |
| Answer» B. 43 Kcal | |