MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 437 Mcqs, each offering curated multiple-choice questions to sharpen your GENERAL SCIENCE knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Which of the following characters is not shown by hydrogen? |
| A. | It combines with almost all metals forming hydrides |
| B. | It readily combines with fluorine and chlorine |
| C. | It supports combustion |
| D. | It burns in air to form water |
| Answer» D. It burns in air to form water | |
| 252. |
In an atomic nucleus, neutrons and protons are held together by? |
| A. | Coulombic forces |
| B. | Exchange forces |
| C. | Gravitational forces |
| D. | Magnetic forces |
| Answer» C. Gravitational forces | |
| 253. |
Antidiuretic hormone (ADH)? |
| A. | Causes the muscular walls of the arterioles to contract that simulates the reabsorption of water from the kidney tubules |
| B. | Inhibits the secretion of growth hormone by the pituitary |
| C. | Causes an increase in the blood pressure |
| D. | Inhibits the rate of heart beat |
| Answer» B. Inhibits the secretion of growth hormone by the pituitary | |
| 254. |
Which of the following elements is obtained from sea weeds ? |
| A. | Sulphur |
| B. | Vanadium |
| C. | Argon |
| D. | Iodine |
| Answer» E. | |
| 255. |
Brass is an alloy of? |
| A. | Copper and silver |
| B. | Nickel and copper |
| C. | Zinc and copper |
| D. | Nickel and zinc |
| Answer» D. Nickel and zinc | |
| 256. |
Bleaching powder is made from? |
| A. | Sulphur dioxide and gypsum |
| B. | Lime and chlorine |
| C. | Soda ash and lime |
| D. | Chlorine and charcoal |
| Answer» C. Soda ash and lime | |
| 257. |
Rust is? |
| A. | A mixture of fe2o3, 3h2o and feo |
| B. | A mixture of fe2o3 and fe(oh)2 |
| C. | A mixture of feo and fe(oh)2 |
| D. | Feo only |
| Answer» B. A mixture of fe2o3 and fe(oh)2 | |
| 258. |
Hydrometer is an instrument? |
| A. | To detect the presence of hydrogen in the atmosphere |
| B. | For measuring the specific gravity of liquids |
| C. | To detect the changes in atmospheric humidity |
| D. | None of the above |
| Answer» C. To detect the changes in atmospheric humidity | |
| 259. |
The metal used in storage batteries? |
| A. | Copper |
| B. | Zinc |
| C. | Iron |
| D. | Lead |
| Answer» E. | |
| 260. |
The contact process is involved in the manufacture of? |
| A. | Ammonia |
| B. | Caustic soda |
| C. | Sulphuric acid |
| D. | Nitric acid |
| Answer» D. Nitric acid | |
| 261. |
The element present in the largest amount in rocks and minerals is? |
| A. | Carbon |
| B. | Aluminium |
| C. | Hydrogen |
| D. | Silicon |
| Answer» D. Silicon | |
| 262. |
Permanent hardness of water can be removed by adding? |
| A. | Washing soda |
| B. | Bleaching powder |
| C. | Potassium permanganate |
| D. | Chlorine |
| Answer» B. Bleaching powder | |
| 263. |
Nitrification means? |
| A. | Photo-electricity reaction starts |
| B. | Liquifaction of nitrogen |
| C. | Production of nitrogen from air |
| D. | Convert the atmospheric nitrogen to effective nitrogen compound |
| Answer» E. | |
| 264. |
Polythene is industrially prepared by the polymerisation of? |
| A. | Acetylene |
| B. | Ethylene |
| C. | Methane |
| D. | Styrene |
| Answer» C. Methane | |
| 265. |
A chronometer measures? |
| A. | Colour contrast |
| B. | Sound waves |
| C. | Time |
| D. | Water waves |
| Answer» D. Water waves | |
| 266. |
Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous glass called? |
| A. | Phosgene |
| B. | Carbon monoxide |
| C. | Phosphine |
| D. | None of these |
| Answer» E. | |
| 267. |
The colour of Emerald is? |
| A. | Deep green |
| B. | Vilot |
| C. | Yellow |
| D. | Orange |
| Answer» B. Vilot | |
| 268. |
Lightening cause rainfall because? |
| A. | It activate h2o molecule |
| B. | Photo-electricity reaction starts |
| C. | It cause combination of oxygen and nitrogen |
| D. | Some of the gas molecules become bigger |
| Answer» B. Photo-electricity reaction starts | |
| 269. |
The fastest acting enzyme in the biological kingdom is? |
| A. | Carboxypeptidase |
| B. | Carbonic anhydrase |
| C. | Lipase |
| D. | Amylase |
| Answer» C. Lipase | |
| 270. |
Which of the following elements is non-radioactive? |
| A. | Plutonium |
| B. | Zirconium |
| C. | Uranium |
| D. | Thorium |
| Answer» C. Uranium | |
| 271. |
The major ingredient of leather is? |
| A. | Collagen |
| B. | Carbohydrate |
| C. | Nucleic acid |
| D. | Polymer |
| Answer» B. Carbohydrate | |
| 272. |
Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of? |
| A. | Sulphonates |
| B. | Nitrates |
| C. | Zeolites |
| D. | None of these |
| Answer» D. None of these | |
| 273. |
In the context of alternative sources of energy, ethanol as a viable bio-fuel can be obtained from- |
| A. | Potato |
| B. | Rice |
| C. | Sugarcane |
| D. | Wheat |
| Answer» D. Wheat | |
| 274. |
Bacteria which are round in shape are called- |
| A. | Vibrio |
| B. | Bacillus |
| C. | Coccus |
| D. | Spirilla |
| Answer» D. Spirilla | |
| 275. |
Which plant is called Herbal-Indian Doctor? |
| A. | Neem |
| B. | Amla |
| C. | Mango |
| D. | Tulsi |
| Answer» E. | |
| 276. |
The spread in colours in a rainbow on sky is primarily due to |
| A. | Dispersion of sunlight |
| B. | Reflection of sunlight |
| C. | Reflection of sunlight |
| D. | Total internal reflection of sunlight |
| Answer» B. Reflection of sunlight | |
| 277. |
One fathom is equal to? |
| A. | 6 feet |
| B. | 6 metres |
| C. | 60 cms |
| D. | 60 feet |
| Answer» B. 6 metres | |
| 278. |
Brass gets discoloured in air due to the presence of which gas in air? |
| A. | Hydrogen sulphide |
| B. | Carbon dioxide |
| C. | Nitrogen |
| D. | Oxygen |
| Answer» B. Carbon dioxide | |
| 279. |
The most important ore of Aluminium is? |
| A. | Calamine |
| B. | Calcite |
| C. | Galena |
| D. | Bauxite |
| Answer» E. | |
| 280. |
Which of the following is in liquid form at room temperature ? |
| A. | Francium |
| B. | Cerium |
| C. | Lithium |
| D. | Sodium |
| Answer» B. Cerium | |
| 281. |
According to Dalton?s atomic theory the smallest particle which can exist independently is? |
| A. | A cation |
| B. | A molecule |
| C. | An anion |
| D. | An atom |
| Answer» E. | |
| 282. |
The chemial name of Uria is? |
| A. | Chloroetane |
| B. | Aneurin |
| C. | Acacia |
| D. | Carbamide |
| Answer» E. | |
| 283. |
Which of the following is the lightest metal ? |
| A. | Silver |
| B. | Lithium |
| C. | Lead |
| D. | Mercury |
| Answer» C. Lead | |
| 284. |
Spondylitis is a disease that affects: |
| A. | Intestine |
| B. | Liver |
| C. | Brain cells |
| D. | Spinal column |
| Answer» E. | |
| 285. |
Alloys are _____________ |
| A. | Harder than the pure metal |
| B. | Softer than the impure metal |
| C. | Harder than the impure metal |
| D. | Softer than the pure metal |
| Answer» B. Softer than the impure metal | |
| 286. |
What is an Isotope? |
| A. | Atoms of an element having different mass number |
| B. | Atoms of an element having different atomic number |
| C. | Atoms of an element having same atomic number |
| D. | Atoms of an element having same mass number |
| Answer» B. Atoms of an element having different atomic number | |
| 287. |
What is the number of periods in which Periodic table is divided? |
| A. | 6 |
| B. | 7 |
| C. | 8 |
| D. | 9 |
| Answer» C. 8 | |
| 288. |
The metal that is present in Photo Films is? |
| A. | Mercury |
| B. | Gold |
| C. | Silver |
| D. | Copper |
| Answer» D. Copper | |
| 289. |
Rusting is an ___________ reaction |
| A. | Reduction |
| B. | Ionization |
| C. | Oxidation |
| D. | None of these |
| Answer» D. None of these | |
| 290. |
Who proposed the ?Wave Theory? of light? |
| A. | Albert einstein |
| B. | Huygens |
| C. | Thomas edison |
| D. | Isaac newton |
| Answer» C. Thomas edison | |
| 291. |
The recent atomic weight scale is based on? |
| A. | 1h2 |
| B. | 1h1 |
| C. | 6c12 |
| D. | 8o16 |
| Answer» D. 8o16 | |
| 292. |
What is needed for rusting to occur? |
| A. | Water and oxygen |
| B. | Carbon dioxide |
| C. | Oxygen |
| D. | Water |
| Answer» B. Carbon dioxide | |
| 293. |
Which of the following is not a mixture? |
| A. | Glass |
| B. | Graphite |
| C. | Steel |
| D. | Aluminium |
| Answer» C. Steel | |
| 294. |
The discovery of viruses was made by- |
| A. | Ivanowski |
| B. | Beijerinck |
| C. | Miller |
| D. | Stanley |
| Answer» B. Beijerinck | |
| 295. |
What is the chemical name of laughing gas? |
| A. | Sulphur dioxide |
| B. | Carbon monoxide |
| C. | Nitrous oxide |
| D. | Hydrogen peroxide |
| Answer» D. Hydrogen peroxide | |
| 296. |
Glass is made from the mixture of? |
| A. | Sand and salt |
| B. | Sand and silicates |
| C. | Quartz and mica |
| D. | None of these |
| Answer» C. Quartz and mica | |
| 297. |
What is the maximum limit of sound intensity in decibel units beyond which a human being cannot hear? |
| A. | 90 decibel |
| B. | 95 decibel |
| C. | 80 decibel |
| D. | 85 decibel |
| Answer» E. | |
| 298. |
Study of insects is called- |
| A. | Ichthyology |
| B. | Neonatology |
| C. | Entomology |
| D. | Anthropology |
| Answer» D. Anthropology | |
| 299. |
Rubber is commonly got from- |
| A. | Castilla elastica |
| B. | Michelia champaca |
| C. | Ficus elastica |
| D. | Hevea brasiliensis |
| Answer» E. | |
| 300. |
Branch of science which deals with the study of skin of man- |
| A. | Physiology |
| B. | Anatomy |
| C. | Biochemistry |
| D. | Dermetology |
| Answer» E. | |