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.
| 251. |
Which of the following is an important source of gold ? |
| A. | Malachite |
| B. | Siderite |
| C. | Alluvial gravel |
| D. | Azurite |
| Answer» D. Azurite | |
| 252. |
The purple colour of [Ti(H |
| A. | Ttransfer of an electron |
| B. | Intermolecular vibrations |
| C. | Presence of water molecules |
| D. | Unpaired d-electron |
| Answer» E. | |
| 253. |
Which of the following is not a property of the transition elements ? |
| A. | Fixed valency |
| B. | Colour |
| C. | Paramagnetic |
| D. | None of these |
| Answer» B. Colour | |
| 254. |
Beryl is an important mineral of |
| A. | Lithium |
| B. | magnesium |
| C. | beryllium |
| D. | Calcium |
| Answer» D. Calcium | |
| 255. |
Silver is present in |
| A. | Limonite |
| B. | Pyrargyrite |
| C. | Magnetite |
| D. | Dolomite |
| Answer» C. Magnetite | |
| 256. |
When metal is obtained in the molten state from its ore, the process may be called |
| A. | Rusting |
| B. | Smelting |
| C. | Calcination |
| D. | Thermal dissociation |
| Answer» C. Calcination | |
| 257. |
The percentage of gold in 21.6 carat of gold is |
| A. | 80% |
| B. | 90% |
| C. | 21.6% |
| D. | 43.2% |
| Answer» C. 21.6% | |
| 258. |
Match the List-I (compound) with List-II (chemical name) and select the correct answer using the codes given below the Lists |
| A. | A. |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» B. B. | |
| 259. |
Which of the following alkaline earth metal shows properties similar to Al ? |
| A. | Ca |
| B. | Be |
| C. | Ba |
| D. | Sr |
| Answer» C. Ba | |
| 260. |
Which of the following alkaline earth metals forms covalent compounds ? |
| A. | Magnesium |
| B. | Calcium |
| C. | Barium |
| D. | Beryllium |
| Answer» E. | |
| 261. |
The highest oxidation state shown by any transition element is |
| A. | +8 |
| B. | +7 |
| C. | +6 |
| D. | +2 |
| Answer» B. +7 | |
| 262. |
Which of the following metals is present in brass, bronze and german silver ? |
| A. | Mg |
| B. | Cu |
| C. | Al |
| D. | Na |
| Answer» C. Al | |
| 263. |
Which has maximum ferro-magnetic character ? |
| A. | Fe |
| B. | Co |
| C. | Ni |
| D. | Pt |
| Answer» B. Co | |
| 264. |
Which is soluble in water ? |
| A. | AgF |
| B. | AgCI |
| C. | AgBr |
| D. | None of these |
| Answer» B. AgCI | |
| 265. |
During the process of electrolytic refining of copper, some metals present as impurity settle as anode mud. These are |
| A. | Pb and Zn |
| B. | Ag and Au |
| C. | Sn and Ag |
| D. | Fe and Ni |
| Answer» C. Sn and Ag | |
| 266. |
The alkali metal which is a liquid at room temperature is |
| A. | Cs |
| B. | Rb |
| C. | Na |
| D. | Fr |
| Answer» E. | |
| 267. |
Non ferromagnetic element is |
| A. | Fe |
| B. | Co |
| C. | Mn |
| D. | Ni |
| Answer» D. Ni | |
| 268. |
Iron obtained from blast furnance is known as |
| A. | Pig iron |
| B. | Hard iron |
| C. | Wrought iron |
| D. | Soft iron |
| Answer» B. Hard iron | |
| 269. |
March 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» B. B. | |
| 270. |
Mercury is transported in metal containers make of |
| A. | Lead |
| B. | Silver |
| C. | Aluminium |
| D. | Iron |
| Answer» E. | |
| 271. |
Cadmium is almost found in the ore of |
| A. | Gold |
| B. | Silver |
| C. | Aluminium |
| D. | Zinc |
| Answer» E. | |
| 272. |
Which of the following is most malleable ? |
| A. | Cu |
| B. | Ag |
| C. | Au |
| D. | none is malleable |
| Answer» D. none is malleable | |
| 273. |
Californium is the member of |
| A. | Actinides |
| B. | Lanthanides |
| C. | Alkali metals |
| D. | Alkalines earth metals |
| Answer» B. Lanthanides | |
| 274. |
The number of unpaired electrons in Fe |
| A. | 4,5,5 |
| B. | 4,5,2 |
| C. | 5,2,4 |
| D. | 5,4,2 |
| Answer» C. 5,2,4 | |
| 275. |
The compounds of alkaline earth metals possess which of the following magnetic nature ? |
| A. | Paramagnetic |
| B. | Diamagnetic |
| C. | Ferromagnetic |
| D. | Antiferromagnetic |
| Answer» C. Ferromagnetic | |
| 276. |
Which of the following is produced when concentrated cinnabar is roasted in the excess of air ? |
| A. | Hg |
| B. | Fe |
| C. | Zn |
| D. | Al |
| Answer» B. Fe | |
| 277. |
The nature of aqueous solution of FeCl |
| A. | Neutral |
| B. | Basic |
| C. | Amphoteric |
| D. | Acidic |
| Answer» E. | |
| 278. |
The highest oxidation state is shown by |
| A. | Ti |
| B. | Cr |
| C. | V |
| D. | Sc |
| Answer» C. V | |
| 279. |
The mixture of MgCl |
| A. | Pseudo alum |
| B. | Sorel's cement |
| C. | Portland cement |
| D. | Alum |
| Answer» C. Portland cement | |