MCQOPTIONS
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MCQOPTIONS
This section includes 1262 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1201. |
Formula of Galena is________? |
| A. | PbS |
| B. | HgS |
| C. | AS2S3 |
| D. | FeS2 |
| Answer» B. HgS | |
| 1202. |
The composition of ‘ Golden spangles is_________? |
| A. | PbCrO4 |
| B. | PbI2 |
| C. | As2Cr2O7 |
| D. | BaCrO4 |
| Answer» B. PbI2 | |
| 1203. |
If volumetric analysis methyl orange indicator is used when_________? |
| A. | Acid is strong |
| B. | Acid is weak |
| C. | Bade is strong |
| D. | Acid is strong base is weak |
| Answer» B. Acid is weak | |
| 1204. |
If a compound contains 24 gram of carbon 2 gram of hydrogen and 64 gram of oxygen then its empirical formula will be________? |
| A. | C2H2O4 |
| B. | CH2 |
| C. | CH2O |
| D. | CHO2 |
| Answer» E. | |
| 1205. |
What is chemical symbol for Tungsten? |
| A. | Z |
| B. | T |
| C. | Tn |
| D. | W |
| Answer» E. | |
| 1206. |
Noble gases are so called zero group because they have:_________? |
| A. | Zero Valency |
| B. | Zero Electronegativity |
| C. | Zero Electron Affinity |
| D. | Both A and B |
| E. | All of these |
| Answer» E. All of these | |
| 1207. |
Alpha (α) particles are helium (He) nucleus with a charge of __________ ? |
| A. | e |
| B. | 2e |
| C. | 3e |
| D. | 4e |
| Answer» C. 3e | |
| 1208. |
When SO2 solution is passed over which of the following it turns green? |
| A. | K2Cr2O7 |
| B. | H2SO4 |
| C. | SO3 |
| D. | P2O5 |
| Answer» B. H2SO4 | |
| 1209. |
Which is artificial manmade fiber? |
| A. | Boron |
| B. | Saffron |
| C. | Rayon |
| D. | None of these |
| Answer» D. None of these | |
| 1210. |
In whole Periodic Table which element Is Most Reducing Agent ? |
| A. | Chlorine |
| B. | lithium |
| C. | Helium |
| D. | Neon |
| Answer» C. Helium | |
| 1211. |
According to Journal of Biological Chemistry 158, human brain and heart are composed of ________water? |
| A. | 75% |
| B. | 81% |
| C. | 73% |
| D. | 89% |
| Answer» D. 89% | |
| 1212. |
which Compound Destroy The OZONE ? |
| A. | CFCs |
| B. | CH3COOH |
| C. | BOTH A & B |
| D. | None Of These |
| Answer» B. CH3COOH | |
| 1213. |
A scale which used to measure the Hydrogen Ion concentration in a solution is known as__________? |
| A. | Thermometer |
| B. | Viscometer |
| C. | PH Scale |
| D. | Stagmometer |
| Answer» D. Stagmometer | |
| 1214. |
Example of ‘globular’ proteins is __________ ? |
| A. | Peptide |
| B. | Enzymes |
| C. | Primary protein |
| D. | Secondary proteins |
| Answer» C. Primary protein | |
| 1215. |
The solution remaining after the formation of crystals is called ___________________? |
| A. | Mother liquor |
| B. | Dilute solution |
| C. | Residue |
| D. | both A & B |
| Answer» B. Dilute solution | |
| 1216. |
When Ammonia is used as a refrigerant in vapour compression cycle? |
| A. | Cu Tubing used |
| B. | Steel tubes used |
| C. | Both a & b |
| D. | Material does not effect by refrigerant |
| Answer» C. Both a & b | |
| 1217. |
Carbon,Diamond and Graphite are together called:___________? |
| A. | Allotrope |
| B. | Isomers |
| C. | Isomorphs |
| D. | Isotopes |
| Answer» B. Isomers | |
| 1218. |
One fathom is equal to:__________? |
| A. | 6 feet |
| B. | 6 meters |
| C. | 60 feet |
| D. | 100 cm |
| Answer» B. 6 meters | |
| 1219. |
Soil pollution is caused by:_________? |
| A. | Aerosol |
| B. | Ozone |
| C. | Acid rain |
| D. | PAN |
| Answer» D. PAN | |
| 1220. |
The practical problem in Hydrogen production is it:______________? |
| A. | Weight |
| B. | Valency |
| C. | Size |
| D. | Chemical property |
| Answer» B. Valency | |
| 1221. |
Radiations are harmful as it:___________? |
| A. | Causes skin cancer |
| B. | Causes anemia |
| C. | Alters body tissue |
| D. | is unstable |
| Answer» B. Causes anemia | |
| 1222. |
The number of ions produced by [Pt(NH3)]Cl2? |
| A. | 4 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» D. 5 | |
| 1223. |
What are the metal bearing rocks called? |
| A. | Bitumen |
| B. | Bauxite |
| C. | Metalloids |
| D. | Ores |
| Answer» E. | |
| 1224. |
Actinides are the elements with atomic number from: |
| A. | 97 to 104 |
| B. | 101 to 115 |
| C. | 89 to 103 |
| D. | 36 to 43 |
| Answer» D. 36 to 43 | |
| 1225. |
The sample of isotopes of an element which needs not to be vaporized in the vaporization chamer |
| A. | Gas |
| B. | Liquid |
| C. | Volatile solid |
| D. | All |
| Answer» B. Liquid | |
| 1226. |
Diameter of an atom is in the order of |
| A. | 0.2m |
| B. | 0.2mm |
| C. | 0.2nm |
| D. | 0.2pm |
| Answer» D. 0.2pm | |
| 1227. |
Which of the following are isoelectronic species? |
| A. | H+ H H- |
| B. | Li+ Na+ K+ |
| C. | C1- Br- I |
| D. | F- Ne Na+ |
| Answer» E. | |
| 1228. |
Mass spectrometer is used to determine Mass number of isotopes and |
| A. | Atomic number |
| B. | Relative abundance |
| C. | Electronic configuration |
| D. | All of the above |
| Answer» C. Electronic configuration | |
| 1229. |
Molecular ions are formed by passing |
| A. | High energy electron beam |
| B. | ? - particle |
| C. | X-rays |
| D. | All of the above |
| Answer» E. | |
| 1230. |
The number of peaks obtained in mass spectrometry shows |
| A. | Relative abundance |
| B. | Average mass of element |
| C. | Number of isotopes |
| D. | Relative isotopic mass |
| Answer» D. Relative isotopic mass | |
| 1231. |
Empirical formula of chloroform is |
| A. | CH2 C12 |
| B. | CH3C1 |
| C. | CC14 |
| D. | CHC13 |
| Answer» E. | |
| 1232. |
Which one is true about isotope? |
| A. | Same number of neutrons |
| B. | Same mass number |
| C. | Same physical properties |
| D. | Same chemical properties |
| Answer» E. | |
| 1233. |
Molecular mass of water (18g) means |
| A. | 1-mole molecules of water |
| B. | 1-gram molecule of water |
| C. | 3-gram atoms |
| D. | All |
| Answer» E. | |
| 1234. |
Which of the following ion formation is always exothermic? |
| A. | Uni-negative |
| B. | Uni-positive |
| C. | Di-negative |
| D. | Di-positive |
| Answer» B. Uni-positive | |
| 1235. |
Which of the following is not a macromolecule? |
| A. | Sand |
| B. | Haemoglobin |
| C. | Diamond |
| D. | Maltose |
| Answer» E. | |
| 1236. |
Which of the following methods is used to estimate hydrogen in an organic compound? |
| A. | Combustion method |
| B. | Dumas method |
| C. | Kjeldahls method |
| D. | All of the above methods are for different purposes |
| Answer» B. Dumas method | |
| 1237. |
Isotopes of the same elements has |
| A. | Different number of protons |
| B. | Same number of neutrons |
| C. | Different number of neutrons |
| D. | Same mass number (nucleon number) |
| Answer» D. Same mass number (nucleon number) | |
| 1238. |
The nucleus of an atom of every element will always contain |
| A. | Neutrons |
| B. | Protons and electrons |
| C. | Protons |
| D. | Protons and neutrons |
| Answer» D. Protons and neutrons | |
| 1239. |
When cationic molecular ions are allowed to pass through strong magnetic field in mass spectrometer which of the following ions is fallen |
| A. | Lighter |
| B. | Intermediate |
| C. | Heavier |
| D. | Are collected at same time |
| Answer» B. Intermediate | |
| 1240. |
When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» E. | |
| 1241. |
For which of the following compounds the term empirical formula cannot be applied? |
| A. | NaCl |
| B. | H2O |
| C. | CCI4 |
| D. | It can be applied to all mentioned above |
| Answer» E. | |
| 1242. |
Dempsters mass spectrometer has number of zones / parts |
| A. | 5 |
| B. | 4 |
| C. | 3 |
| D. | 2 |
| Answer» B. 4 | |
| 1243. |
The properties of an element mosly corresponds to that isotope which has greater |
| A. | Mass number |
| B. | Atomic mass |
| C. | Relative abundance |
| D. | All of the above |
| Answer» D. All of the above | |
| 1244. |
Which of the following terms is not used for ionic compound? |
| A. | Formula unit |
| B. | Empirical formula |
| C. | Molecular formula |
| D. | Formula mass |
| Answer» D. Formula mass | |
| 1245. |
Which of the following terms is used for the mass of chlorine 35.5? |
| A. | Relative atomic mass |
| B. | Mass number |
| C. | Atomic weight |
| D. | Relative isotopic mass |
| Answer» B. Mass number | |
| 1246. |
Which one of the following has the maximum number of isotopes? |
| A. | Oxygen |
| B. | Carbon |
| C. | Tin |
| D. | Chlorine |
| Answer» D. Chlorine | |
| 1247. |
Which one of the following is not the mono isotopic element? |
| A. | Arsenic |
| B. | Uranium |
| C. | Iodine |
| D. | Nickel |
| Answer» C. Iodine | |
| 1248. |
The volume occupied by 2.8 g of N2 at STP |
| A. | 2.24 dm3 |
| B. | 22.4 dm3 |
| C. | 1.12 dm3 |
| D. | 112 dm3 |
| Answer» B. 22.4 dm3 | |
| 1249. |
The mass of decimole of electrons (NA) is |
| A. | 1.008 mg |
| B. | 0.184 mg |
| C. | 0.054 mg |
| D. | 5.4 mg |
| Answer» D. 5.4 mg | |
| 1250. |
The number of moles of CO2 which contains 16 g of oxygen is |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 1 |
| Answer» C. 0.75 | |