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.
| 201. |
Gamma rays are |
| A. | High energy electrons |
| B. | Low energy electrons |
| C. | High energy electromagnetic |
| D. | High energy positrons waves |
| Answer» D. High energy positrons waves | |
| 202. |
A mixture of sand and naphthalene can be seperated by __________ |
| A. | Fractional distillation |
| B. | Sublimation |
| C. | Chromatography |
| D. | Any of them |
| Answer» C. Chromatography | |
| 203. |
Alum is used |
| A. | As an analgesic |
| B. | In the purification of water |
| C. | As a fertilizer |
| D. | As a disinfectant |
| Answer» C. As a fertilizer | |
| 204. |
Isotopes of the atoms of same element have |
| A. | Same number of neutrons |
| B. | Same number of protons |
| C. | Same atomic mass |
| D. | Different chemical properties |
| Answer» C. Same atomic mass | |
| 205. |
What are long chains of Carbon Molecules called |
| A. | Ribosomes |
| B. | Hydrocarbons |
| C. | Polymers |
| D. | None |
| Answer» D. None | |
| 206. |
Which of the following is used to preserve specimens in the biology laboratory? |
| A. | Phenol |
| B. | Benzaldehyde |
| C. | Formaldehyde |
| D. | Acetic acid |
| Answer» D. Acetic acid | |
| 207. |
Which of the following metal is generally used for making filaments of bulb? |
| A. | W |
| B. | Ag |
| C. | Fe |
| D. | Rh |
| Answer» B. Ag | |
| 208. |
Which Noble Gas has the highest First Ionization Energy? |
| A. | Neon |
| B. | Helium |
| C. | Argon |
| D. | Xenon |
| Answer» C. Argon | |
| 209. |
The function of nitrogen in air is |
| A. | To make air a moderate supporter of combustion |
| B. | To maintain the density of air constant |
| C. | To prevent the hydrogen in air from exploding |
| D. | To reduce the poisonous nature of ozone in air |
| Answer» B. To maintain the density of air constant | |
| 210. |
One of the ingredients of the paste on the side of a match box is |
| A. | Phosphorus pentaoxide |
| B. | Phosphorus trichloride |
| C. | Phosphorus trisulphide |
| D. | Phosphorus trioxide |
| Answer» D. Phosphorus trioxide | |
| 211. |
How many Covalent Bonds can Nitrogen form |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» C. 4 | |
| 212. |
Which one of the following laws explain the formation of carbon monoxide and carbon dioxide from carbon and oxygen....... |
| A. | Law of conservation of mass |
| B. | Law of multiple proportion |
| C. | Law of reciprocal proportions |
| D. | Law of definite proportions |
| Answer» C. Law of reciprocal proportions | |
| 213. |
Nucleus of Hydrogen atom consists of |
| A. | 2 protons only |
| B. | 2 neutrons only |
| C. | 1 proton only |
| D. | 1 electron only |
| Answer» D. 1 electron only | |
| 214. |
The number of waves in n x 10th Bohr's orbit are |
| A. | N2 |
| B. | N |
| C. | N-2 |
| D. | N3 |
| Answer» C. N-2 | |
| 215. |
How many valence electrons are in carbon? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 3 |
| Answer» C. 6 | |
| 216. |
What is the IUPAC name for the following compound? |
| A. | Acetylene |
| B. | Methyl acetylene |
| C. | Butanol |
| D. | Decanoic acid |
| Answer» C. Butanol | |
| 217. |
Which of the following is a false statement? |
| A. | As bond order increases the strength of the bond increases |
| B. | Bond order is proportional to the bond length |
| C. | Molecules with negative bond order are highly unstable |
| D. | Bond order is inversely proportional to the bond length |
| Answer» C. Molecules with negative bond order are highly unstable | |
| 218. |
which of the following are chemical changes? |
| A. | A & b |
| B. | A, b & c |
| C. | C & d |
| D. | All the above |
| Answer» B. A, b & c | |
| 219. |
Which of the following is a Decomposition Reaction? |
| A. | 2hgo ----> 2hg + o2 |
| B. | 6nano3 ----> 6nano2 + 3o2 |
| C. | Znco3 ----> zno + co2 |
| D. | All the above |
| Answer» E. | |
| 220. |
Which of the following is not a pure substance? |
| A. | Oxygen |
| B. | Carbon dioxide |
| C. | Water |
| D. | Milk |
| Answer» E. | |
| 221. |
Acid Precipitation is caused by a mix of |
| A. | Hydrogen, oxygen, and saline |
| B. | Water, soil, and air |
| C. | Respiration, carbonic acids, and seawater |
| D. | Sulfur dioxide, carbon dioxide, nitrogen oxides |
| Answer» E. | |
| 222. |
Ozone is concentrated in the |
| A. | Stratosphere |
| B. | Troposphere |
| C. | Ionosphere |
| D. | Mesosphere |
| Answer» B. Troposphere | |
| 223. |
Which of the Following is an Amorphoussolid? |
| A. | Quartz glass(sio2) |
| B. | Chrome alum |
| C. | Silicon carbide(sic) |
| D. | Graphite |
| Answer» B. Chrome alum | |
| 224. |
What is the freezing point of water in Celsius? |
| A. | 0 deg c |
| B. | 32 deg c |
| C. | -42 deg c |
| D. | -32 deg c |
| Answer» B. 32 deg c | |
| 225. |
Natural Rubber is a Polymer of |
| A. | Butadiene |
| B. | 2methyl-1,3butadiene |
| C. | Ethylene |
| D. | Isoprene |
| Answer» E. | |
| 226. |
Which of the following is an Organic Molecule? |
| A. | Nitrogen gas |
| B. | Ammonia |
| C. | Fructose |
| D. | Water |
| Answer» D. Water | |
| 227. |
Harmful bacteria in drinking water cannot be destroyed by |
| A. | Chlorination |
| B. | Boiling |
| C. | Adding caustic soda |
| D. | Ozonisation |
| Answer» D. Ozonisation | |
| 228. |
Which of the following chemical compounds has the highest boiling point? |
| A. | Dimethyl ether (ch3och3) |
| B. | Methanol (ch3oh) |
| C. | Methane (ch4) |
| D. | None |
| Answer» C. Methane (ch4) | |
| 229. |
A bond formed by the transfer of electrons between atoms of the elements is called |
| A. | Ionic bond |
| B. | Covalent bond |
| C. | Co-ordinate bond |
| D. | Hydrogen bond |
| Answer» B. Covalent bond | |
| 230. |
The soaps used in shaving cream are |
| A. | Calcium soaps |
| B. | Lead soaps |
| C. | Soft soaps |
| D. | Hard soaps |
| Answer» D. Hard soaps | |
| 231. |
Acute diabets patients smell of |
| A. | Acetone |
| B. | Ether |
| C. | Ethyl alcohol |
| D. | Methyl alcohol |
| Answer» B. Ether | |
| 232. |
What type of Lipid is Estrogen? |
| A. | Phospholipid |
| B. | Steroid |
| C. | Wax |
| D. | Triglyceride |
| Answer» C. Wax | |
| 233. |
Which of the following describes the process of glycolysis? |
| A. | It represents the first stage in the chemical oxidation of glucose by a cell. |
| B. | Breakdown of glucose |
| C. | Converts glucose to pyruvate |
| D. | All the above |
| Answer» E. | |
| 234. |
The iron ore magnetite consists of |
| A. | Fe2o3 |
| B. | Fe3oh4 |
| C. | Feco3 |
| D. | 3fe2o3 .. 3h2o |
| Answer» B. Fe3oh4 | |
| 235. |
The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of |
| A. | An addition reaction |
| B. | A condensation reaction |
| C. | An oxidation reaction |
| D. | An elimination reaction |
| Answer» C. An oxidation reaction | |
| 236. |
The Latin word formica means ant. The name formic acid is derived from this Latin word because |
| A. | This acid, in ancient times, was used to eliminate ant-hills |
| B. | This corrosive acid is secreted by ants to drive away their enemies |
| C. | This acid was first obtained by the distillation of ants |
| D. | Ants are attracted by the odour of this acid |
| Answer» D. Ants are attracted by the odour of this acid | |
| 237. |
What happens when two atoms form a chemical bond? |
| A. | Two atoms fuse together to form a chemical bond |
| B. | The atoms share or transfer electrons |
| C. | A chemical bond forms when two atoms transfer or share protons to achieve a stable nucleus |
| D. | Like charges in the atoms cause them to stick together |
| Answer» C. A chemical bond forms when two atoms transfer or share protons to achieve a stable nucleus | |
| 238. |
Which of the following equations represents Photosynthesis? |
| A. | 6co2 + 6h2o -----> c6h12o6 + 6o2 |
| B. | C6h12o6 + 6o2 -----> co2 + 6h2o |
| C. | Co2 + h2o -----> c6h12o6 + 6o2 |
| D. | 6o2 + 6h2o -----> c6h12o6 + 6co2 |
| Answer» B. C6h12o6 + 6o2 -----> co2 + 6h2o | |
| 239. |
Which of the following is an example of chemical weathering? |
| A. | Oxidation |
| B. | Acid rains |
| C. | Carbonation |
| D. | All the above |
| Answer» E. | |
| 240. |
Aspirin is |
| A. | Ethyl salicylate |
| B. | Methyl salicylate |
| C. | Sodium salicylate |
| D. | Acetyl salicylic acid |
| Answer» E. | |
| 241. |
What is the simplest form of matter? |
| A. | Element |
| B. | Molecule |
| C. | Atom |
| D. | Compound |
| Answer» B. Molecule | |
| 242. |
Which of the following is produced during the formation of photochemical smog ? |
| A. | Ozone |
| B. | Methane |
| C. | Hydrocarbons |
| D. | Nitrogen oxides |
| Answer» B. Methane | |
| 243. |
Washing soda is ? |
| A. | Sodiun carbonate |
| B. | Sodium sulphite |
| C. | Sodium biosulphite |
| D. | Sodium bicarbonate |
| Answer» B. Sodium sulphite | |
| 244. |
What nucleus of atom contains ? |
| A. | Protons |
| B. | Electrons |
| C. | Protons and neutrons |
| D. | Electrons and protons |
| Answer» D. Electrons and protons | |
| 245. |
Nail polish remover contains ? |
| A. | Acetone |
| B. | Benzene |
| C. | Acetic acid |
| D. | Petroleum ether |
| Answer» B. Benzene | |
| 246. |
Which one of the following metals does not react with water to produce Hydrogen? |
| A. | Sodium |
| B. | Lithium |
| C. | Cadmium |
| D. | Potassium |
| Answer» D. Potassium | |
| 247. |
What is a mixture of potassium nitrate powdered charcoal and sulphur called? |
| A. | Brass |
| B. | Paint |
| C. | Gun powder |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 248. |
Identify the wrong statement in the following |
| A. | Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius |
| B. | Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius |
| C. | Atomic radius of the elements increases as one moves down the first group of the periodic table |
| D. | Atomic radius of the elements decreases as one moves across from left to right in the 2nd period |
| Answer» C. Atomic radius of the elements increases as one moves down the first group of the periodic table | |
| 249. |
Homo nuclear molecules contain ? |
| A. | Ionic bond |
| B. | Polar bond |
| C. | Covalent bond |
| D. | Coordinate bond |
| Answer» D. Coordinate bond | |
| 250. |
The nuclear particles which are assumed to hold the nucleons together are ? |
| A. | Mesons |
| B. | Electrons |
| C. | Neutrons |
| D. | Positrons |
| Answer» B. Electrons | |