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.
| 201. |
Which of the following is an essential element used in the synthesis of proteins and other compounds? |
| A. | Phosphorus |
| B. | Iron |
| C. | Magnesium |
| D. | Nitrogen |
| Answer» E. | |
| 202. |
Which is a natural colloid? |
| A. | Sodium chloride |
| B. | Urea |
| C. | Cane-sugar |
| D. | Blood |
| Answer» E. | |
| 203. |
Which one of the following is-a greenhouse gas? |
| A. | Nitrogen |
| B. | Helium |
| C. | Carbon dioxide |
| D. | Sulphur dioxide |
| Answer» D. Sulphur dioxide | |
| 204. |
Another name for baking soda is : |
| A. | Sodium bicarbonate |
| B. | Sodium carbonate |
| C. | Sodium sulphate |
| D. | Sodium hydroxide |
| Answer» B. Sodium carbonate | |
| 205. |
The chemical name of baking soda is - |
| A. | Sodium carbonate |
| B. | Sodium bicarbonate |
| C. | Sodium chloride |
| D. | Sodium nitrate |
| Answer» C. Sodium chloride | |
| 206. |
The metal used in storage batteries- |
| A. | Iron |
| B. | Copper |
| C. | Lead |
| D. | Zinc |
| Answer» D. Zinc | |
| 207. |
Of the following commonly used materials, the one that is not an alloy is - |
| A. | Steel |
| B. | Brass |
| C. | Bronze |
| D. | Copper |
| Answer» E. | |
| 208. |
The element with highest first ionization energy is - |
| A. | hydrogen |
| B. | helium |
| C. | lithium |
| D. | sodium |
| Answer» C. lithium | |
| 209. |
This substance is commonly known as alcohol and is also used in medicines such as tincture iodine, cough syrups, and many tonics. This is - |
| A. | Propanol |
| B. | Butane |
| C. | Ethanol |
| D. | Methanol |
| Answer» D. Methanol | |
| 210. |
Carbon reacts with metal to form - |
| A. | Carbide |
| B. | Carbonate |
| C. | Hydroxide |
| D. | Oxide |
| Answer» B. Carbonate | |
| 211. |
Metals have . |
| A. | High melting and boiling point |
| B. | Low melting and boiling point |
| C. | High melting and low boiling point |
| D. | Low melting and high boiling point |
| Answer» B. Low melting and boiling point | |
| 212. |
The pH of a neutral solution is - |
| A. | 0-7 |
| B. | 7 |
| C. | 7-14 |
| D. | None of the above |
| Answer» C. 7-14 | |
| 213. |
The manufacturing of iron from ironore involves the process of - |
| A. | Oxidation |
| B. | Reduction |
| C. | Electrolysis |
| D. | Fractional distillation |
| Answer» C. Electrolysis | |
| 214. |
In which of the following states maximum iron ore is found? |
| A. | FeCO |
| B. | Fe O |
| C. | Fe O |
| D. | FeS |
| Answer» C. Fe O | |
| 215. |
Manganite is an ore/mineral of . |
| A. | Beryllium |
| B. | Chromium |
| C. | Manganese |
| D. | Copper |
| Answer» D. Copper | |
| 216. |
J. B. Sumner isolated first enzyme from Jackbeans as- |
| A. | amylase |
| B. | trypsin |
| C. | urease |
| D. | renin |
| Answer» D. renin | |
| 217. |
Whichof the following appeared to be with a significant potential for accumulation through food chains? |
| A. | DDT |
| B. | Parathion |
| C. | Lindane |
| D. | Carbary |
| Answer» B. Parathion | |
| 218. |
As which one of the following, does carbon occur in its purest form in nature? |
| A. | Carbon black |
| B. | Graphite |
| C. | Diamond |
| D. | Coal |
| Answer» D. Coal | |
| 219. |
Carbon occurs in nature in the purest form as - |
| A. | Diamond |
| B. | Graphite |
| C. | Carbon black |
| D. | Coal |
| Answer» B. Graphite | |
| 220. |
Heavy metals got their name because compared to other atoms they have - |
| A. | Higher densities |
| B. | Higher atomic masses |
| C. | Higher atomic numbers |
| D. | Higher atomic radii |
| Answer» C. Higher atomic numbers | |
| 221. |
What is the number of atoms constituting a molecule known as - |
| A. | Atomic number |
| B. | Isotopes |
| C. | Atomic mass |
| D. | Atomicity |
| Answer» E. | |
| 222. |
The chemical bahaviour of an atom depends upon - |
| A. | the number of protons in its nucleus |
| B. | the number of neutrons in the nucleus |
| C. | the number of electrons orbiting around the nucleus |
| D. | the number of nucleons in the nucleus |
| Answer» D. the number of nucleons in the nucleus | |
| 223. |
Methyl phenyl ether can be obtained by reacting - |
| A. | phenolate ions and methyl iodide |
| B. | methoxide ions and bromobenzene |
| C. | methanol and phenol |
| D. | bromobenzene and methyl bromide |
| Answer» B. methoxide ions and bromobenzene | |
| 224. |
The weight of 6.023 x 1022 atoms of carbon is |
| A. | 12 gms |
| B. | 120 gms |
| C. | 1.2 gms |
| D. | 0.12 gms |
| Answer» B. 120 gms | |
| 225. |
In upper layer of atmosphere ozone is formed by - |
| A. | the action of ultraviolet rays on oxygen |
| B. | the combination of oxygen molecules |
| C. | subjecting oxygen to high pressure |
| D. | the action of nitrogen on oxygen in atmosphere |
| Answer» B. the combination of oxygen molecules | |
| 226. |
Mechanical energy is the combination of kinetic energy and . |
| A. | Heat energy |
| B. | Chemical energy |
| C. | Potential energy |
| D. | Nuclear energy |
| Answer» D. Nuclear energy | |
| 227. |
Fungi are plants that lack - |
| A. | Oxygen |
| B. | Carbon dioxide |
| C. | Chlorophyll |
| D. | None of these |
| Answer» D. None of these | |
| 228. |
The sum of potential energy and kinetic energy is known as : |
| A. | Electrical energy |
| B. | Chemical energy |
| C. | Light energy |
| D. | Mechanical energy |
| Answer» E. | |
| 229. |
Conversion of chemical energy into electrical energy occurs in - |
| A. | Atomic bombs |
| B. | Dynamo |
| C. | A battery |
| D. | Electric heaters |
| Answer» D. Electric heaters | |
| 230. |
When a lead storage battery is discharged - |
| A. | SO2 is evolved |
| B. | Lead sulphate is consumed |
| C. | Lead is formed |
| D. | Sulphuric acid is consumed |
| Answer» E. | |
| 231. |
A mixture of carbon monoxide and hydrogen is called - |
| A. | Producer gas |
| B. | Water gas |
| C. | Natural gas |
| D. | None |
| Answer» C. Natural gas | |
| 232. |
The degree of dissociation of an electrolyte depends on - |
| A. | dilution |
| B. | impurities |
| C. | atmospheric pressure |
| D. | method of dissolution |
| Answer» B. impurities | |
| 233. |
Which acid is used in Lead storage batteiy? |
| A. | Sulphuric acid |
| B. | Nitric acid |
| C. | Hydrochlotic acid |
| D. | Acetic acid |
| Answer» B. Nitric acid | |
| 234. |
The hardest substance available in earth is |
| A. | Platinum |
| B. | Silicon |
| C. | Diamond |
| D. | Gold |
| Answer» D. Gold | |
| 235. |
is not an allotrope of carbon. |
| A. | Buckminsterfullerene |
| B. | Carbon Doxide |
| C. | Diamond |
| D. | Graphite |
| Answer» C. Diamond | |
| 236. |
Which of the metallic ions is essential for blood clotting? |
| A. | Na+ |
| B. | Ca++ |
| C. | K+ |
| D. | Fe++ |
| Answer» C. K+ | |
| 237. |
Hardest material is - |
| A. | Tungsten |
| B. | Diamond |
| C. | Steel |
| D. | Graphite |
| Answer» C. Steel | |
| 238. |
What happens when a chemical bond is formed? |
| A. | energy is always absorbed |
| B. | energy in always released |
| C. | more energy is released than is absorbed |
| D. | energy is neither released nor absorbed |
| Answer» E. | |
| 239. |
The ore of Aluminium is - |
| A. | Fluorspar |
| B. | Bauxite |
| C. | Chalco pyrites |
| D. | Hematite |
| Answer» C. Chalco pyrites | |
| 240. |
The relation between bond length and bond energy is - |
| A. | Lower the bond energy, shorter the bond length |
| B. | They are not related |
| C. | Higher the bond energy, shorter the bond length |
| D. | Higher the bond energy, longer the bond length |
| Answer» D. Higher the bond energy, longer the bond length | |
| 241. |
Energy posses by a body in motion is called - |
| A. | Kinetic Energy |
| B. | Potential Energy |
| C. | Both of Above |
| D. | None of Above |
| Answer» B. Potential Energy | |
| 242. |
Electron affinity of noble gases is - |
| A. | zero |
| B. | Low |
| C. | High |
| D. | Very high |
| Answer» B. Low | |
| 243. |
Which one among the following is-used as a moderator in nuclear reactors? |
| A. | Ozone |
| B. | Heavy hydrogen |
| C. | Heavy water |
| D. | Hydrogen peroxide |
| Answer» D. Hydrogen peroxide | |
| 244. |
Which of the following is used as anesthetic? |
| A. | NH3 |
| B. | NO |
| C. | NO2 |
| D. | N2O |
| Answer» C. NO2 | |
| 245. |
All isotopes of the same element have |
| A. | different atomic numbers and different atomic mass |
| B. | different atomic numbers and the same atomic mass |
| C. | the same atomic number but different atomic masses |
| D. | the same atomic number and the atomic mass |
| Answer» D. the same atomic number and the atomic mass | |
| 246. |
KMnO4 can be used as a/an - |
| A. | insecticide |
| B. | fertiliser |
| C. | pesticide |
| D. | disinfectant |
| Answer» E. | |
| 247. |
What happens in a reduction reaction? |
| A. | addition of Oxygen |
| B. | addition of Nitrogen |
| C. | addition of Hydrogen |
| D. | None of the above |
| Answer» D. None of the above | |
| 248. |
Acid rain is caused by the pollution of environment by - |
| A. | carbon dioxide and nitrogen |
| B. | carb n monoxide and carbon dioxide |
| C. | ozone and carbon dioxide |
| D. | nitrous oxide and sulphur dioxide |
| Answer» E. | |
| 249. |
Acid rain is caused by - |
| A. | SO2 and particulates |
| B. | (2) NO2 and particulates |
| C. | (8) CO2 and CFCs |
| D. | (4) SO2 and NO2 |
| Answer» E. | |
| 250. |
Acid rain is caused by, the pollution of environment by - |
| A. | carbon dioxide and nitrogen |
| B. | carbon monoxide and carbon dioxide |
| C. | ozone and carbon dioxide |
| D. | nitrous oxide and sulphur dioxide |
| Answer» B. carbon monoxide and carbon dioxide | |