MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 621 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge (GK) knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
Which one of the following is radioactive? |
| A. | Cesium |
| B. | Platinum |
| C. | Strontium |
| D. | Thorium |
| Answer» E. | |
| 302. |
The element used for making solar cells is - |
| A. | Magnesium |
| B. | Sodium |
| C. | Calcium |
| D. | Silicon |
| Answer» E. | |
| 303. |
Which of the following elements is non- radioactive? |
| A. | Uranium |
| B. | Thorium |
| C. | Plutonium |
| D. | Zirconium |
| Answer» E. | |
| 304. |
Combustion of a candle is a/an - |
| A. | photochemical reaction |
| B. | physical change |
| C. | endothermic reaction |
| D. | exothermic reaction |
| Answer» E. | |
| 305. |
Rutherford s scattering experiment proved the presence of - |
| A. | atoms in all matter |
| B. | electrons in atoms |
| C. | neutrons in atoms |
| D. | nucleusin atoms |
| Answer» E. | |
| 306. |
The compound used in prickly-heat powder to prevent excessive sweating is |
| A. | Boric acid |
| B. | Phosphoric acid |
| C. | Carbonic acid |
| D. | Sulphonic acid |
| Answer» B. Phosphoric acid | |
| 307. |
Gelatin is mostly used in making icecreams in order to - |
| A. | prevent making a colloid |
| B. | stabilise the colloid and prevent crystallisation |
| C. | stabilise mixture |
| D. | enrich the aroma |
| Answer» C. stabilise mixture | |
| 308. |
Which one of the following has a maximum tendency to form M^3 ion? |
| A. | N |
| B. | Bi |
| C. | P |
| D. | As |
| Answer» B. Bi | |
| 309. |
Ethanoic acid is commonly called - |
| A. | Acetic acid |
| B. | Sulphuric acid |
| C. | Sodium Ethoxide |
| D. | Ethyne |
| Answer» B. Sulphuric acid | |
| 310. |
lodex, a pain relief balm, has the smell of . |
| A. | Methyl salicylate |
| B. | Ethyl salicylate |
| C. | Propyl salicylate |
| D. | Butyl salicylate |
| Answer» B. Ethyl salicylate | |
| 311. |
Match sticks are made of - |
| A. | Red phosphorus |
| B. | blue phosphorus |
| C. | led nitrate |
| D. | None |
| Answer» B. blue phosphorus | |
| 312. |
'Milk Sugar' is |
| A. | Lactose |
| B. | Maltose |
| C. | Galactose |
| D. | Sucrose |
| Answer» B. Maltose | |
| 313. |
Taj Mahal is greatly affected due to |
| A. | Tourists |
| B. | Acid rain |
| C. | Deforestation |
| D. | Sound pollution |
| Answer» C. Deforestation | |
| 314. |
Which of the following could be used as fuel in propellant or rockets? |
| A. | Liquid Hydrogen + Liquid Nitrogen |
| B. | Liquid Oxygen + Liquid Argon |
| C. | Liquid Nitrogen + Liquid Oxygen |
| D. | Liquid Hydrogen + Liquid Oxygen |
| Answer» E. | |
| 315. |
Which one of the folling is also khow as solution? |
| A. | Acompound |
| B. | Ahomogeneous mixture |
| C. | A heterogeneous mixture |
| D. | A suspension |
| Answer» C. A heterogeneous mixture | |
| 316. |
When a spoon is to be electroplated with nickel the spoon is - |
| A. | dipped in a nickel sulphate solution |
| B. | made anode and a pure nickel rod, the cathode |
| C. | made cathode and a pure nickel red, the anode |
| D. | coated with nickel sulphate and dried |
| Answer» D. coated with nickel sulphate and dried | |
| 317. |
Which of the following is used as no coating for Cooking utensils? |
| A. | Perspex |
| B. | Styrofoam |
| C. | Polystyrene |
| D. | (4)Teflon |
| Answer» E. | |
| 318. |
Bauxite is used as raw material by which industry? |
| A. | Aluminium |
| B. | Iron |
| C. | Steel |
| D. | Gold |
| Answer» B. Iron | |
| 319. |
Bagasse, a by-product of sugar manufacturing industry, is used for the production of - |
| A. | Glass |
| B. | Paper |
| C. | Rubber |
| D. | Cement |
| Answer» C. Rubber | |
| 320. |
The term PVC used in the plastic industry stands for - |
| A. | polyvinyl chloride |
| B. | polyvinyl carbonate |
| C. | phosphor vanadium chloride |
| D. | phosphavinyl chloride |
| Answer» B. polyvinyl carbonate | |
| 321. |
Substances that cause a reaction to occur or proceed at a different rate without the reaction itself being affected are called - |
| A. | Catalysts |
| B. | Hydrocarbons |
| C. | Oxidising agents |
| D. | Substitutes |
| Answer» B. Hydrocarbons | |
| 322. |
potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? |
| A. | From brown to blue-black |
| B. | From brown to orange-red |
| C. | From blue to pink |
| D. | From pink to blue-green |
| Answer» B. From brown to orange-red | |
| 323. |
Magnets attract magnetic substances are iron, nickel, cobalt, etc. They can also repel - |
| A. | paramagnetic substances |
| B. | ferromagnetic substances |
| C. | diamagnetic substances |
| D. | non-magnetic substances |
| Answer» D. non-magnetic substances | |
| 324. |
Supersonic jet causes pollution by thinning of - |
| A. | O3 layer |
| B. | O2 layer |
| C. | SO2 layer |
| D. | CO2 layer |
| Answer» B. O2 layer | |
| 325. |
Tear gas used by the police to disperse the mob contains - |
| A. | Carbon dioxide |
| B. | Chlorine |
| C. | Ammonia |
| D. | Hydrogen sulphide |
| Answer» C. Ammonia | |
| 326. |
Tetra ethyle lead (TEL) is - |
| A. | a catalyst in burning fossil fuel |
| B. | an antioxidant |
| C. | areductant |
| D. | an antiknock compound |
| Answer» E. | |
| 327. |
Gamma rays are - |
| A. | High energy electrons |
| B. | Low energy electrons |
| C. | High energy electromagnetic |
| D. | High energy positron waves |
| Answer» D. High energy positron waves | |
| 328. |
Glass is soluble in - |
| A. | H2SO4 |
| B. | HCIO4 |
| C. | HNO3 |
| D. | HF |
| Answer» E. | |
| 329. |
Glass is mainly composed of - |
| A. | Sodium silicate |
| B. | Calcium carbonate |
| C. | Calcium hydroxide |
| D. | Sodium bicarbonate |
| Answer» B. Calcium carbonate | |
| 330. |
Glass is - |
| A. | Super cooled liquid |
| B. | Crystalline solid |
| C. | Liquid crystal |
| D. | None of these |
| Answer» B. Crystalline solid | |
| 331. |
One of the constituents of tear gas is - |
| A. | Ethane |
| B. | Ethanol |
| C. | Ether |
| D. | Chloropicrin |
| Answer» E. | |
| 332. |
Which one of the following polymers is widely used for making bullet proof material? |
| A. | Polyvinyl chloride |
| B. | Polyamides |
| C. | Polyethylene |
| D. | Polycarbonates |
| Answer» E. | |
| 333. |
Submarines move under water. They have engines that run on - |
| A. | Petrol and oxygen |
| B. | Diesel |
| C. | Batteries |
| D. | Steam |
| Answer» C. Batteries | |
| 334. |
Acid used in an automobile battery? |
| A. | Sulphuric acid |
| B. | Hydrochloric acid |
| C. | Nitric acid |
| D. | Citric acid |
| Answer» B. Hydrochloric acid | |
| 335. |
Gobar gas contains mainly |
| A. | methane |
| B. | ethylene |
| C. | propylene |
| D. | acetylene |
| Answer» B. ethylene | |
| 336. |
All noble gases are - |
| A. | Colourless |
| B. | Odourless |
| C. | Colourless and Odourless |
| D. | Light blue |
| Answer» D. Light blue | |
| 337. |
Which of the following produces H2 gas, when reacts with acid? |
| A. | Zn |
| B. | S |
| C. | C |
| D. | O |
| Answer» B. S | |
| 338. |
Non-metallic character increases from |
| A. | Magnesium to Barium |
| B. | Potassium to Cesium |
| C. | Oxygen to Selenium |
| D. | Sodium to Chlorine |
| Answer» E. | |
| 339. |
Ruby and sapphire are oxides of - |
| A. | capper |
| B. | tin |
| C. | iron |
| D. | aluminium |
| Answer» E. | |
| 340. |
Two electrons in an orbital are differentiated by which of the following? |
| A. | Magnetic quantum number |
| B. | Spin quantum number |
| C. | Principal quantum number |
| D. | Azimuthal quantum number |
| Answer» C. Principal quantum number | |
| 341. |
Cyanide poisoning causes death in seconds because - |
| A. | It denatures enzymes of the heart/muscle |
| B. | It breaks the electron transport chain |
| C. | It causes Lysis of red blood cells |
| D. | It causes cardiac arrest |
| Answer» E. | |
| 342. |
Which of the following in auto-mobile exhaust can cause cancer? |
| A. | Oxides of nitrogen |
| B. | Carbon monoxide |
| C. | Lead |
| D. | Polyclinic hydrocarbons |
| Answer» C. Lead | |
| 343. |
Which one of the following has greatest mass? |
| A. | electron |
| B. | proton |
| C. | neutron |
| D. | hydrogen nucleus |
| Answer» D. hydrogen nucleus | |
| 344. |
The most reactive among the halogens is - |
| A. | Fluorine |
| B. | Chlorine |
| C. | Bromine |
| D. | Iodine |
| Answer» B. Chlorine | |
| 345. |
The metal used for making air crafts and rockets is |
| A. | Lead |
| B. | Aluminium |
| C. | Nickel |
| D. | Copper |
| Answer» D. Copper | |
| 346. |
The common name of sodium bicarbonate is - |
| A. | Soda ash |
| B. | Baking soda |
| C. | Soda lime |
| D. | Baking powder |
| Answer» C. Soda lime | |
| 347. |
The scientific name for common salt is- |
| A. | Sodium hydroxide |
| B. | Sodium chloride |
| C. | Ammonium chloride |
| D. | Sodium hydrogencarbonate |
| Answer» C. Ammonium chloride | |
| 348. |
Which of the following is used as lubricant? |
| A. | Graphite |
| B. | Silica |
| C. | Diamond |
| D. | Iron Oxide |
| Answer» B. Silica | |
| 349. |
Which of the following imparts deep blue colour to glass? |
| A. | Cobalt oxide |
| B. | Cupric oxide |
| C. | Ferrous oxide |
| D. | Nickel oxide |
| Answer» E. | |
| 350. |
Acids turn blue litmus into which color? |
| A. | Green |
| B. | Red |
| C. | Pink |
| D. | Colourless |
| Answer» C. Pink | |