MCQOPTIONS
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MCQOPTIONS
This section includes 279 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
The mineral containing titanium occuring in India is |
| A. | Bauxite |
| B. | Dolomite |
| C. | Chalcopyrite |
| D. | Illmenite |
| Answer» E. | |
| 202. |
Transition elements are also knwon as |
| A. | s-block elements |
| B. | p-block elements |
| C. | d-block elements |
| D. | f-block elements |
| Answer» D. f-block elements | |
| 203. |
Which one of the following elements shows highest oxidation state ? |
| A. | Pt |
| B. | Rh |
| C. | Os |
| D. | Fe |
| Answer» D. Fe | |
| 204. |
Van arkel method of purification of metals involves converting the metal to |
| A. | Volatile compound |
| B. | None-volatile stable compound |
| C. | Volatile unstable compound |
| D. | None of the above |
| Answer» B. None-volatile stable compound | |
| 205. |
The process of zone refining is used for |
| A. | Silicon |
| B. | Gallium |
| C. | Germanium |
| D. | All of these |
| Answer» E. | |
| 206. |
Cement does not contain |
| A. | Iron |
| B. | aluminium |
| C. | calcium |
| D. | sulphur |
| Answer» E. | |
| 207. |
Reduction of oxide with carbon at high temperature is called |
| A. | calcination |
| B. | smelting |
| C. | roasting |
| D. | none |
| Answer» C. roasting | |
| 208. |
Flux reacts, with the impurities to form fusible material which is known as |
| A. | gangue |
| B. | slag |
| C. | anode |
| D. | none |
| Answer» C. anode | |
| 209. |
The reason of floating of the ore particles concentration by froth floatation process is their |
| A. | being light |
| B. | being insoluble |
| C. | being charged |
| D. | being hudrophobic |
| Answer» E. | |
| 210. |
The removal of gangue from the ore is collect |
| A. | concentration |
| B. | liquation |
| C. | hand picking |
| D. | leaching |
| Answer» B. liquation | |
| 211. |
Calcination is the process of heating the ore ? |
| A. | in a blast furnace |
| B. | in absence of air |
| C. | in presence of air |
| D. | none |
| Answer» C. in presence of air | |
| 212. |
Electrolytic reduction method is used in extraction of |
| A. | Noble metals |
| B. | Highly electropositive element |
| C. | Highly electronegative elements |
| D. | Transition metals |
| Answer» C. Highly electronegative elements | |
| 213. |
In blast furnace, maximum temperature is in |
| A. | Zone of reduction |
| B. | Zone of combusion |
| C. | Zone of fusion |
| D. | Zone of slag combustion |
| Answer» C. Zone of fusion | |
| 214. |
The lanthanide contraction i responsible for the fact that |
| A. | Zr an Y have about he same radius |
| B. | Zr and Zn have the same oxidation state |
| C. | Zr and Hf have about is same redius |
| D. | Zr and Nb have similar oxidation state |
| Answer» D. Zr and Nb have similar oxidation state | |
| 215. |
Which is most active metal among the following |
| A. | Al |
| B. | Cu |
| C. | Ni |
| D. | Pb |
| Answer» B. Cu | |
| 216. |
Metal, which forms coloured chloride is |
| A. | Al |
| B. | Cr |
| C. | Sn |
| D. | Zn |
| Answer» C. Sn | |
| 217. |
Which of the following is a carbonate ore ? |
| A. | cassiterite |
| B. | pyrolysite |
| C. | diaspore |
| D. | malachite |
| Answer» E. | |
| 218. |
The process of sudden cooling is known as |
| A. | annealing |
| B. | diffusion |
| C. | quencing |
| D. | sedimentation |
| Answer» D. sedimentation | |
| 219. |
Which of the following is a true statements regarding calcination |
| A. | The ore is heated strongly in the absence of any blast of air |
| B. | The ore is heated with calcium |
| C. | The ore is heated with carbon |
| D. | The mineral is melted with lime stone |
| Answer» B. The ore is heated with calcium | |
| 220. |
The second series of transition elements starts with |
| A. | scandium |
| B. | ytterbium |
| C. | rhodium |
| D. | yttrium |
| Answer» E. | |
| 221. |
The 3d transition series contains elements from atomic number |
| A. | 21 to 30 |
| B. | 21 to 29 |
| C. | 21 to 31 |
| D. | 22 to 30 |
| Answer» B. 21 to 29 | |
| 222. |
Which lanthanides are used in glass, blowers, goggles |
| A. | Eu, Gd |
| B. | Pr, Nd |
| C. | Np, Pu |
| D. | Am, Cm |
| Answer» C. Np, Pu | |
| 223. |
Lanthanides contraction is related with |
| A. | atomic radii only |
| B. | ionic radii only |
| C. | both atomic and ionic radii |
| D. | oxidation only |
| Answer» D. oxidation only | |
| 224. |
The matallic nature of transition elements is .......than that of alkali metals |
| A. | more |
| B. | same |
| C. | less |
| D. | none |
| Answer» D. none | |
| 225. |
Consider the following elements |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 1 and 3 |
| D. | 1, 2 and 3 |
| Answer» E. | |
| 226. |
The percentage of silver in german silver, is |
| A. | 0% |
| B. | 10% |
| C. | 2.5% |
| D. | 4.5% |
| Answer» B. 10% | |
| 227. |
Which of the following alloys contains Cu and Zn ? |
| A. | Bell metal |
| B. | Aluminium bronze |
| C. | Brass |
| D. | Bronze |
| Answer» D. Bronze | |
| 228. |
Silicon is the constituent of |
| A. | Rocks |
| B. | Alloys |
| C. | Animals |
| D. | Plants |
| Answer» B. Alloys | |
| 229. |
In Goldschmidt aluminothermic process, reducing agent is |
| A. | Coke |
| B. | Na |
| C. | Al-powder |
| D. | Cu |
| Answer» D. Cu | |
| 230. |
Which of the following acts as an antidote to HgCl |
| A. | Yellow of egg |
| B. | egg of fish |
| C. | white of egg |
| D. | egg |
| Answer» D. egg | |
| 231. |
Misch metal is widely used in the manufacture of which of the following ? |
| A. | material of car brake |
| B. | somke detectors |
| C. | cigaratte lighters |
| D. | Emergency light |
| Answer» D. Emergency light | |
| 232. |
Mohr's salt on oxidation with conc HNO |
| A. | Neutral |
| B. | Basic |
| C. | Amphoteric |
| D. | Acidic |
| Answer» E. | |
| 233. |
The highest oxidation state shown by Mn is |
| A. | +2 |
| B. | +3 |
| C. | +6 |
| D. | +7 |
| Answer» E. | |
| 234. |
Which of the following group elements easily form complexes ? |
| A. | s-block |
| B. | p-block |
| C. | d-block |
| D. | all of these |
| Answer» D. all of these | |
| 235. |
The colour given by calcium to the flame is |
| A. | green |
| B. | crimson red |
| C. | brick red |
| D. | violet |
| Answer» D. violet | |
| 236. |
The element which is not a liquid at room temperatre (30 |
| A. | Hg |
| B. | Ga |
| C. | Br |
| D. | Ge |
| Answer» E. | |
| 237. |
The most common and stable oxidation state of lanthanides is |
| A. | +1 |
| B. | +2 |
| C. | +3 |
| D. | +4 |
| Answer» D. +4 | |
| 238. |
Oxidation state of iron in Haemoglobin is |
| A. | +2 |
| B. | +3 |
| C. | 0 |
| D. | -2 |
| Answer» B. +3 | |
| 239. |
Both lanthanides and actinides have their last valance electron in |
| A. | (n-1)d |
| B. | (n-2)f |
| C. | ns |
| D. | np |
| Answer» C. ns | |
| 240. |
Salts of which of the following elements provide colours to fireworks ? |
| A. | Zinc and sulphur |
| B. | Potassium and mercury |
| C. | Strontium and barium |
| D. | Chromium and nickel |
| Answer» D. Chromium and nickel | |
| 241. |
Which of the following transition elements is synthetic ? |
| A. | Pm |
| B. | Mo |
| C. | Te |
| D. | Re |
| Answer» D. Re | |
| 242. |
Which alloy can have iron also |
| A. | Monel metal |
| B. | Constantan |
| C. | Aluminium bronze |
| D. | Brass |
| Answer» D. Brass | |
| 243. |
Match the List-I with List-II and select the correct answer using the codes given below the Lists |
| A. | A. |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» E. | |
| 244. |
Which of the following metals do not form amalgam ? |
| A. | Zinc |
| B. | Copper Magnesium |
| C. | Iron |
| D. | . |
| Answer» E. | |
| 245. |
Which of the following does not belong to 3d series of transition elements ? |
| A. | Palladium |
| B. | Iron |
| C. | Vanadium |
| D. | Titanium |
| Answer» B. Iron | |
| 246. |
Zone refining is a method to obtain |
| A. | High temperature |
| B. | Ultra pure oxides |
| C. | Ultra pure metals |
| D. | all of these |
| Answer» D. all of these | |
| 247. |
Which of the following is used in atomic reactors ? |
| A. | Fe |
| B. | Cd |
| C. | Ru |
| D. | Al |
| Answer» C. Ru | |
| 248. |
Ferrosilicon is used the steel industry as |
| A. | Cutting tool |
| B. | Flux |
| C. | A reducing agent |
| D. | Alloyint agent |
| Answer» E. | |
| 249. |
How many electrons are involved in the oxidation by KMnO |
| A. | 5 |
| B. | 3 |
| C. | 2 |
| D. | 4 |
| Answer» E. | |
| 250. |
Asbestos is silicate mineral of calcium and |
| A. | K |
| B. | Al |
| C. | Ba |
| D. | Mg |
| Answer» E. | |