MCQOPTIONS
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MCQOPTIONS
This section includes 1300 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is |
| A. | Chain isomerism |
| B. | Functional group isomerism |
| C. | Positional isomerism |
| D. | Metamerism |
| Answer» D. Metamerism | |
| 252. |
The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in |
| A. | 1.8 gram of h2o |
| B. | 12 moles of kmno4 |
| C. | 0.6n h2so4 |
| D. | 4.6 gram of c2h5oh |
| Answer» C. 0.6n h2so4 | |
| 253. |
The most abundant element in the earth's crust is ? |
| A. | Silicon |
| B. | Oxygen |
| C. | Nitrogen |
| D. | Aluminium |
| Answer» C. Nitrogen | |
| 254. |
Who is regarded as father of modern chemistry ? |
| A. | Einstein |
| B. | Lavoisier |
| C. | Ruterford |
| D. | C.v. raman |
| Answer» C. Ruterford | |
| 255. |
The metal that is used as a catalyst in the hydrogenation of oils is ? |
| A. | Ni |
| B. | Cu |
| C. | Pt |
| D. | Pb |
| Answer» B. Cu | |
| 256. |
Who proposed first atomic theory ? |
| A. | De broglie |
| B. | John dalton |
| C. | E.rutherford |
| D. | D.i.mendeleef |
| Answer» C. E.rutherford | |
| 257. |
Human bone does not contain |
| A. | Oxygen |
| B. | Carbon |
| C. | Calcium |
| D. | Phosphorous |
| Answer» B. Carbon | |
| 258. |
The term PVC used in the plastic industry stands for |
| A. | Polyvinyl chloride |
| B. | Polyvinyl carbobate |
| C. | Phosphavinyl chloride |
| D. | Phosphor vanadiu chloride |
| Answer» B. Polyvinyl carbobate | |
| 259. |
Atomic number is equal to |
| A. | Number of nutron |
| B. | Number of protons |
| C. | Number of electrons |
| D. | Total number of protons and neutrons |
| Answer» C. Number of electrons | |
| 260. |
Oil of vitriol is |
| A. | Nitric acid |
| B. | Sulphuric acid |
| C. | Phosphoric acid |
| D. | Hydrochloric acid |
| Answer» C. Phosphoric acid | |
| 261. |
Biogas majorly contains ? |
| A. | Methane |
| B. | Hydrogen |
| C. | Ethane |
| D. | Co |
| Answer» B. Hydrogen | |
| 262. |
Which of the following gas is used in cigarette lighters ? |
| A. | Ethane |
| B. | Butane |
| C. | Propane |
| D. | Methane |
| Answer» C. Propane | |
| 263. |
Which of the following gases is the most toxic? |
| A. | Acetic acid |
| B. | Carbon dioxide |
| C. | Sulphur dioxide |
| D. | Carbon monoxide |
| Answer» E. | |
| 264. |
Air contains maximum amount of |
| A. | Oxygen |
| B. | Nitrogen |
| C. | Hydrogen |
| D. | Carbon dioxide |
| Answer» C. Hydrogen | |
| 265. |
Bleaching action of chlorine is by |
| A. | Oxidation |
| B. | Reduction |
| C. | Hydrolysis |
| D. | Decomposition |
| Answer» E. | |
| 266. |
Which is not a type of elements ? |
| A. | Metals |
| B. | Gases |
| C. | Metalloids |
| D. | Non metals |
| Answer» C. Metalloids | |
| 267. |
Which metal is heaviest ? |
| A. | Iron |
| B. | Nickle |
| C. | Osmium |
| D. | Mercury |
| Answer» D. Mercury | |
| 268. |
pH of water is |
| A. | 5 |
| B. | 6 |
| C. | 7 |
| D. | 8 |
| Answer» D. 8 | |
| 269. |
Which acid is present in lemon ? |
| A. | Citric acid |
| B. | Lactic acid |
| C. | Marlic acid |
| D. | Tartaric acid |
| Answer» B. Lactic acid | |
| 270. |
pH of blood is ? |
| A. | 5 |
| B. | 6.2 |
| C. | 7.4 |
| D. | 8.6 |
| Answer» D. 8.6 | |
| 271. |
Rare gases are |
| A. | Di atomic |
| B. | Tri atomic |
| C. | Mono atomic |
| D. | None of above |
| Answer» C. Mono atomic | |
| 272. |
Which is also called Stranger Gas ? |
| A. | Neon |
| B. | Argon |
| C. | Xenon |
| D. | Nitrous oxide |
| Answer» D. Nitrous oxide | |
| 273. |
Which is used in preparation of dynamite ? |
| A. | Glycol |
| B. | Glycerol |
| C. | Ethyl alcohol |
| D. | Methyl alcohol |
| Answer» C. Ethyl alcohol | |
| 274. |
The most abundant rare gas in the atmosphere is ? |
| A. | Ar |
| B. | Ne |
| C. | He |
| D. | Xe |
| Answer» B. Ne | |
| 275. |
Symbol for silver in periodic table is |
| A. | Ag |
| B. | Au |
| C. | Al |
| D. | Na |
| Answer» B. Au | |
| 276. |
Which have the maximum density ? |
| A. | Ice |
| B. | Water |
| C. | Benzene |
| D. | Chloroform |
| Answer» C. Benzene | |
| 277. |
Which gas is used in fire extinguishers ? |
| A. | Nitrogen oxide |
| B. | Carbon dioxide |
| C. | Sulpher dioxide |
| D. | Carbon monoxide |
| Answer» C. Sulpher dioxide | |
| 278. |
Natural rubber is a polymer derived from ? |
| A. | Isoprene |
| B. | Ethylene |
| C. | Propylene |
| D. | Butadiene |
| Answer» B. Ethylene | |
| 279. |
The oxide of Nitrogen used in medicine as anaesthetic is ? |
| A. | Nitric oxide |
| B. | Nitrous oxide |
| C. | Nitrogen dioxide |
| D. | Nitrogen pentoxide |
| Answer» E. | |
| 280. |
The metallurgical process in which a metal is obtained in a fused state is called ? |
| A. | Roasting |
| B. | Smelting |
| C. | Calcinations |
| D. | Froth floatation |
| Answer» C. Calcinations | |
| 281. |
The isotope atoms differ in ? |
| A. | Atomic weight |
| B. | Atomic number |
| C. | Number of electrons |
| D. | Number of neutrons |
| Answer» E. | |
| 282. |
What is Calcium sulphate ? |
| A. | Blue vitriol |
| B. | Epsom salt |
| C. | Gypsum salt |
| D. | Potash alum |
| Answer» D. Potash alum | |
| 283. |
The ejection of electrons when a metal surface is irradiated is known as |
| A. | Zeeman effect |
| B. | Atomic spectrum |
| C. | Photoelectric effect |
| D. | Black body radiation |
| Answer» D. Black body radiation | |
| 284. |
Sugars are converted in the liver into |
| A. | Vitamin |
| B. | Glycogen |
| C. | Monosaccharide |
| D. | None of above |
| Answer» C. Monosaccharide | |
| 285. |
What is hottest part of the gas flame is called ? |
| A. | Dark zone |
| B. | Blue zone |
| C. | Luminous zone |
| D. | Non-luminous zone |
| Answer» E. | |
| 286. |
Mass number of a nucleus is : |
| A. | Always less than its atomic number |
| B. | Always more than the atomic weight |
| C. | The sum of the number of protons and neutrons present in the nucleus |
| D. | None of these |
| Answer» D. None of these | |
| 287. |
Brass is an alloy of ? |
| A. | Copper and tin |
| B. | Copper and zinc |
| C. | Iron and copper |
| D. | Copper and aluminium |
| Answer» C. Iron and copper | |
| 288. |
Air is a |
| A. | Colloid |
| B. | Element |
| C. | Mixture |
| D. | Compound |
| Answer» D. Compound | |
| 289. |
The substance that contains the maximum amount of nitrogen is ? |
| A. | Urea |
| B. | Ammonium nitrate |
| C. | Ammonium chloride |
| D. | Ammonium sulphate |
| Answer» B. Ammonium nitrate | |
| 290. |
Ozone is : |
| A. | Non-magnetic |
| B. | Ferromagnetic |
| C. | Paramagnetic |
| D. | Diamagnetic |
| Answer» E. | |
| 291. |
Which of the primary component of natural gas? |
| A. | Butane |
| B. | Ethane |
| C. | Propane |
| D. | Methane |
| Answer» E. | |
| 292. |
Water drops are spherical because of ? |
| A. | Density |
| B. | Polarity |
| C. | Viscosity |
| D. | Surface tension |
| Answer» E. | |
| 293. |
The maximum number of isomers for an alkene with molecular formula C4H8 is |
| A. | 5 |
| B. | 4 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 294. |
The number of g-molecule of oxygen in 6.02 x 1024CO molecules is |
| A. | 1 gram of molecule |
| B. | 0.5 gram of molecule |
| C. | 5 gram of molecule |
| D. | 10 gram of molecule |
| Answer» D. 10 gram of molecule | |
| 295. |
The number of electrons presents in H+ is |
| A. | Zero |
| B. | One |
| C. | Two |
| D. | Three |
| Answer» B. One | |
| 296. |
The high reactivity of fluorine is due to ? |
| A. | Strong f - f bond |
| B. | Availability of d-orbitals |
| C. | Its high electro negativity |
| D. | Small size of fluorine atom |
| Answer» D. Small size of fluorine atom | |
| 297. |
Which gas is filled in refrigerators ? |
| A. | Butane |
| B. | Methane |
| C. | Acetylene |
| D. | Chlorofluorocarbon |
| Answer» E. | |
| 298. |
Chemical used in photography is |
| A. | Sodium oxalate |
| B. | Sodium sulphite |
| C. | Sodium sulphate |
| D. | Sodium thiosulphate |
| Answer» E. | |
| 299. |
The luster of a metal is due to : |
| A. | High density |
| B. | High polishing |
| C. | Chemical inertness |
| D. | Presence of free electrons |
| Answer» E. | |
| 300. |
The acid generally stored in batteries is |
| A. | Acetic acid |
| B. | Nitric acid |
| C. | Sulphuric acid |
| D. | Hydrochloric acid |
| Answer» D. Hydrochloric acid | |