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.
| 1201. |
A basic salt that is used in daily life is ________. |
| A. | Ammonium phosphate |
| B. | Sodium chloride |
| C. | Ammonium sulphate |
| D. | Sodium carbonate |
| Answer» C. Ammonium sulphate | |
| 1202. |
Isotopes are atoms showing same _________? |
| A. | Mass Number |
| B. | Atomic Number |
| C. | Atomic Mass |
| D. | Number of Neutrons |
| Answer» C. Atomic Mass | |
| 1203. |
In the lead acid battery, during charging, the cathode reaction is |
| A. | Reduction of Pb2+ to Pb |
| B. | Formation of PbSO4 |
| C. | Formation of PbO2 |
| D. | None of the above |
| Answer» C. Formation of PbO2 | |
| 1204. |
Ionic bond formation is ___________. |
| A. | Exothermic |
| B. | Endothermic |
| C. | Both (a) & (b) |
| D. | None of these |
| Answer» B. Endothermic | |
| 1205. |
Containers for carrying strong acids are made of? |
| A. | Platinum |
| B. | Lead |
| C. | Copper |
| D. | Brass |
| Answer» C. Copper | |
| 1206. |
Calculate the relative molecular mass of CO2. |
| A. | 46 u |
| B. | 44 u |
| C. | 40 u |
| D. | 45 u |
| Answer» C. 40 u | |
| 1207. |
_____ base gives less OH – ion when dissolved in water. |
| A. | NH4OH |
| B. | Ba(OH)2 |
| C. | NaOH |
| D. | Ca(OH)2 |
| Answer» B. Ba(OH)2 | |
| 1208. |
In ________, carbon atoms are arranged in the shape of a football. |
| A. | Fullerenes |
| B. | Methane |
| C. | Benzene |
| D. | Ethane |
| Answer» B. Methane | |
| 1209. |
Norwegian saltpeter is a synonym for which of the following chemicals? |
| A. | Calcium phosphate |
| B. | Calcium nitrate |
| C. | Calcium chloride |
| D. | Calcium carbonate |
| Answer» C. Calcium chloride | |
| 1210. |
N2 + 3H2 ⇋ 2NH3 + HeatThe Le Chatelier's principle suggests that are required to drive the reaction to the right and thus form NH3. |
| A. | high pressure and low temperature |
| B. | low pressure and low temperature |
| C. | high pressure and high temperature |
| D. | low pressure and high temperature |
| Answer» B. low pressure and low temperature | |
| 1211. |
In Periodic table, elements are arranged according to |
| A. | Mass Number |
| B. | Atomic Number |
| C. | Electron Number |
| D. | Atomic $ Mass Number |
| Answer» C. Electron Number | |
| 1212. |
Complete the reaction:Calcium hydroxide + carbon dioxide → ------------------+ water |
| A. | Calcium |
| B. | Calcium bicarbonate |
| C. | Calcium oxide |
| D. | Calcium carbonate |
| Answer» E. | |
| 1213. |
_______ gas is used as an illuminating gas. |
| A. | Methyl |
| B. | Propane |
| C. | Acetylene |
| D. | Ethyne |
| Answer» C. Acetylene | |
| 1214. |
______ is most commonly formed by reaction of an acid and an alcohol. |
| A. | Ethanol |
| B. | Esters |
| C. | Carboxylic acid |
| D. | Ketones |
| Answer» C. Carboxylic acid | |
| 1215. |
8 g of NaOH is dissolved in 18 g of H2O Mole fraction of NaOH in solution and molality (in mol kg-1) of the solution respectively are |
| A. | 0.2, 11.11 |
| B. | 0.167, 22.20 |
| C. | 0.2, 22.20 |
| D. | 0.167, 11.11 |
| Answer» E. | |
| 1216. |
All of the following are condensation polymers EXCEPT _______. |
| A. | polyester |
| B. | polypropylene |
| C. | polyamide |
| D. | polycarbonate |
| Answer» B. polypropylene | |
| 1217. |
Natural pearls contain more than 80% ________. |
| A. | silica |
| B. | calcium carbonate |
| C. | sodium carbonate |
| D. | quartz |
| Answer» C. sodium carbonate | |
| 1218. |
Generally, Oxides of ______ are acidic in nature. |
| A. | Metals |
| B. | Non-Metals |
| C. | Both metals and non-metals |
| D. | Neither metals nor non-metals |
| Answer» C. Both metals and non-metals | |
| 1219. |
But-2-ene on reaction with alkaline KMnO4 at elevated temperature followed by acidification will given: |
| A. | \(\begin{array}{*{20}{c}} {{\rm{C}}{{\rm{H}}_3} - {\rm{CH}} - {\rm{CH}} - {\rm{C}}{{\rm{H}}_3}}\\ {{\rm{\;}}\left| {\rm{\;}} \right|{\rm{\;}}}\\ {{\rm{\;OH\;OH}}} \end{array}\) |
| B. | One molecule of CH3CHO and one molecule of CH3COOH |
| C. | 2 molecules of CH3COOH |
| D. | 2 molecules of CH3CHO |
| Answer» D. 2 molecules of CH3CHO | |
| 1220. |
________ has a very high melting and boiling points. |
| A. | Diamond |
| B. | Fullerene |
| C. | Graphite |
| D. | Charcoal |
| Answer» B. Fullerene | |
| 1221. |
________ is an important metal to form amalgam. |
| A. | Tungsten |
| B. | Mercury |
| C. | Aluminium |
| D. | Iron |
| Answer» C. Aluminium | |
| 1222. |
Phenolphthalein becomes pink in- |
| A. | Alkalis |
| B. | Acids |
| C. | Water |
| D. | Salt Solutions |
| Answer» B. Acids | |
| 1223. |
Atomic number of a nucleus is Z and mass number is A. Find the number of neutrons. |
| A. | A - Z |
| B. | A |
| C. | Z |
| D. | A + Z |
| Answer» B. A | |
| 1224. |
A molecule of oxygen consists of how many atoms of oxygen? |
| A. | Eight |
| B. | Six |
| C. | Four |
| D. | Two |
| Answer» E. | |
| 1225. |
In Mendeleev’s periodic table, ________ appeared before Nickel. |
| A. | Co |
| B. | Rb |
| C. | Mo |
| D. | Sr |
| Answer» B. Rb | |
| 1226. |
Elements of IInd period are known as _________. |
| A. | Typical element |
| B. | Bridge element |
| C. | Transitional element |
| D. | Normal element |
| Answer» C. Transitional element | |
| 1227. |
Hexane and heptane are completely miscible. At 25 °C, the vapor pressures of hexane and heptane are 0.198 atm and 0.06 atm, respectively. The mole fractions of hexane and heptane in the vapor phase for a solution containing 4 M hexane and 6 M heptane, respectively, are: |
| A. | 0.688 and 0.312 |
| B. | 0.400 and 0.600 |
| C. | 0.312 and 0.688 |
| D. | 0.600 and 0.400 |
| Answer» B. 0.400 and 0.600 | |
| 1228. |
How many covalent bonds are present in a Chloropropane molecule having molecular formula, C3H7Cl ? |
| A. | 6 |
| B. | 8 |
| C. | 9 |
| D. | 10 |
| Answer» E. | |
| 1229. |
If an atom, which has 2K, 8L, 18M and 2N electrons in the ground state. The total no. of electrons having magnetic quantum no. m = 0 is- |
| A. | 6 |
| B. | 10 |
| C. | 7 |
| D. | 14 |
| Answer» E. | |
| 1230. |
Activity of radioactive sample decreases to 1/3rd of its original value in 3 days. Then in 9 days its activity will become |
| A. | 1/3 of its original value |
| B. | 1/9 of its original value |
| C. | 1/18 of its original value |
| D. | 1/27 of its original value |
| Answer» E. | |
| 1231. |
A blue litmus will turn __________ when contacted with acid. |
| A. | Blue |
| B. | Black |
| C. | Orange |
| D. | Red |
| Answer» E. | |
| 1232. |
A magnesium ribbon burns with a dazzling: |
| A. | White flame |
| B. | orange flame |
| C. | blue flame |
| D. | purple flame |
| Answer» B. orange flame | |
| 1233. |
On the pH scale, we can measure pH from 0 (very acidic) to ______ (very alkaline). |
| A. | 12 |
| B. | 16 |
| C. | 10 |
| D. | 14 |
| Answer» E. | |
| 1234. |
For emission line of atomic hydrogen from ni = 8 to nf = n the plot of wave number (v) against \(\left( {\frac{1}{{{{\rm{n}}^2}}}} \right)\) will be(The Rydberg constant, RH is in wave number unit). |
| A. | Linear with slope -RH |
| B. | Linear with intercept -RH |
| C. | Non linear |
| D. | Linear with slope RH |
| Answer» E. | |
| 1235. |
Ammonia (NH3) obtained from different sources always has same proportion of Nitrogen and Hydrogen. It proves the validity of law of: |
| A. | Reciprocal proportion |
| B. | Constant proportion |
| C. | Multiple porportions |
| D. | None of the above |
| Answer» C. Multiple porportions | |
| 1236. |
Nylon clothes dry up faster than cotton clothes because it: |
| A. | Is a porous material |
| B. | Has low degree of water absorption |
| C. | Has high degree of water absorption |
| D. | Has good elasticity |
| Answer» C. Has high degree of water absorption | |
| 1237. |
Now a days Di chlorine (Cl2) is substituted in the bleaching of paper with: |
| A. | Hydrogen peroxide |
| B. | Ozone |
| C. | Bleaching powder |
| D. | Sulphur dioxide |
| Answer» B. Ozone | |
| 1238. |
Generally, the valency of electropositive elements is ________. |
| A. | 2, 1, 0 |
| B. | 4, 3, 2 |
| C. | 1, 2, 3 |
| D. | 0, 1, 2 |
| Answer» D. 0, 1, 2 | |
| 1239. |
In the modern periodic table, periods _____ and _____ contain Lanthanoides and actinoides |
| A. | 3 and 4 |
| B. | 6 and 7 |
| C. | 4 and 5 |
| D. | 5 and 6 |
| Answer» C. 4 and 5 | |
| 1240. |
At room temperature, a dilute solution of urea is prepared by dissolving 0.60 g of urea in 360 g of water. If the vapour pressure of pure water at this temperature is 35 mmHg, lowering of vapour pressure will be:(Molar mass of urea = 60 g mol-1) |
| A. | 0.027 mm Hg |
| B. | 0.028 mm Hg |
| C. | 0.017 mm Hg |
| D. | 0.031 mm Hg |
| Answer» D. 0.031 mm Hg | |
| 1241. |
A special property of acids and bases is their ability to _______ each other’s properties. |
| A. | Crystalize |
| B. | Neutralize |
| C. | Amortize |
| D. | Naturalize |
| Answer» C. Amortize | |
| 1242. |
In diamond, each carbon atom is bonded to: |
| A. | two other carbon atoms |
| B. | three other carbon atoms |
| C. | four other carbon atoms |
| D. | five other carbon atoms |
| Answer» D. five other carbon atoms | |
| 1243. |
Chemical formula of Ammonia is _______. |
| A. | PH3 |
| B. | NO2 |
| C. | AIN |
| D. | NH3 |
| Answer» E. | |
| 1244. |
Natural gas mainly consists of |
| A. | Butane |
| B. | Propane |
| C. | Methane |
| D. | Ethane |
| Answer» D. Ethane | |
| 1245. |
Nitrogen in water is commonly found in the form of _____? |
| A. | Nitrate |
| B. | Nitric Oxide |
| C. | Nitrite |
| D. | Nitrous Oxide |
| Answer» B. Nitric Oxide | |
| 1246. |
\(C{H_3}C{H_2}C{H_2}Cl + alc.\;KOH\mathop \to \limits^\Delta C{H_3}CH = C{H_2} + KCl + {H_2}O\) |
| A. | Electrophilic substitution & elimination |
| B. | Nucleophilic substitution & elimination |
| C. | Only electrophilic reaction |
| D. | Only nucleophilic reaction |
| Answer» C. Only electrophilic reaction | |
| 1247. |
Choose the term that does NOT belong to the following group. |
| A. | Krypton |
| B. | Argon |
| C. | Neon |
| D. | Platinum |
| Answer» E. | |
| 1248. |
In an acidic solution, China rose indicator turns |
| A. | Orange |
| B. | Green |
| C. | Magenta (Dark Pink) |
| D. | Colorless |
| Answer» D. Colorless | |
| 1249. |
Fe2O3 + 2Al ⟶ Al2O3 + 2FeThe above reaction is an example of ________. |
| A. | Combination reaction |
| B. | Double displacement reaction |
| C. | Decomposition reaction |
| D. | Displacement reaction |
| Answer» E. | |
| 1250. |
At the triple point, the substance co-exists in1. Liquid phase2. Solid phase3. Vapour phaseSelect the correct answer using the code given below: |
| A. | 1 only |
| B. | 1 and 2 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» E. | |