MCQOPTIONS
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MCQOPTIONS
This section includes 2539 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 2451. |
Mass of one molecule of sulphuric acid is |
| A. | 98 |
| B. | 95 |
| C. | 97 |
| D. | 92 |
| Answer» B. 95 | |
| 2452. |
Amount of oxygen in combustion analysis is determined by method of |
| A. | product |
| B. | difference |
| C. | addition |
| D. | division |
| Answer» C. addition | |
| 2453. |
Mass spectrometer use to determine isotopes in solid state is |
| A. | Bohr's |
| B. | Aston's |
| C. | dempester's |
| D. | Alison's |
| Answer» D. Alison's | |
| 2454. |
Relative molecular mass for propene (C₃H₆) is |
| A. | 12 |
| B. | 42 |
| C. | 24 |
| D. | 21 |
| Answer» C. 24 | |
| 2455. |
Law of definite proportion is obeyed in |
| A. | Stoichiometry |
| B. | electrometry |
| C. | spectrometer |
| D. | photometry |
| Answer» B. electrometry | |
| 2456. |
Atoms bonded to each carbon atom in a molecule can be determined by |
| A. | molecular formula |
| B. | empirical formula |
| C. | structural formula |
| D. | skeletal formula |
| Answer» D. skeletal formula | |
| 2457. |
The number or organic compounds known today is above |
| A. | 1 million |
| B. | 2million |
| C. | 3 million |
| D. | 4 million |
| Answer» E. | |
| 2458. |
The least detail of simplest ratio of different types of atoms in a molecule is represented in |
| A. | molecular formula |
| B. | empirical formula |
| C. | structural formula |
| D. | skeletal formula |
| Answer» C. structural formula | |
| 2459. |
Isotopes differ in number of |
| A. | electrons |
| B. | protons |
| C. | neutrons |
| D. | anti neutrino |
| Answer» D. anti neutrino | |
| 2460. |
Isotopes of calcium are |
| A. | seven |
| B. | six |
| C. | nine |
| D. | twelve |
| Answer» C. nine | |
| 2461. |
Example of atom having single isotope is |
| A. | carbon |
| B. | calcium |
| C. | gold |
| D. | cadmium |
| Answer» D. cadmium | |
| 2462. |
Products which are obtained in a chemical reaction is |
| A. | production |
| B. | No yield |
| C. | theoretical yield |
| D. | actual yield |
| Answer» E. | |
| 2463. |
In ionization chamber vapors are bombarded with fast moving |
| A. | protons |
| B. | electrons |
| C. | neutrons |
| D. | antineutron |
| Answer» C. neutrons | |
| 2464. |
In accelerating chamber of mass spectrometer potential difference is |
| A. | 500-2000 |
| B. | 600-7000 |
| C. | 300-8000 |
| D. | 700-9000 |
| Answer» B. 600-7000 | |
| 2465. |
Isotopes have same |
| A. | atomic mass |
| B. | atomic number |
| C. | molecules |
| D. | atoms |
| Answer» C. molecules | |
| 2466. |
Elements with even number of isotopes are |
| A. | 156 |
| B. | 154 |
| C. | 153 |
| D. | 152 |
| Answer» C. 153 | |
| 2467. |
Most abundant molecular ions are |
| A. | Anions |
| B. | Cations |
| C. | Neutral ions |
| D. | Sulphur ions |
| Answer» C. Neutral ions | |
| 2468. |
Instrument use to measure exact 'atomic masses' is |
| A. | Mass spectrometer |
| B. | spectrometer |
| C. | nanometer |
| D. | both a and b |
| Answer» B. spectrometer | |
| 2469. |
Positive ion formation is |
| A. | Exothermic |
| B. | Endothermic |
| C. | no energy |
| D. | neutral |
| Answer» C. no energy | |
| 2470. |
In new spectrometers each ion hits a |
| A. | Detector |
| B. | ionizer |
| C. | collector |
| D. | graph |
| Answer» B. ionizer | |
| 2471. |
Reactant which controls amount of products is |
| A. | deficient reactant |
| B. | limiting reactant |
| C. | excess reactant |
| D. | none of these |
| Answer» C. excess reactant | |
| 2472. |
Modern method for separation of isotopes is |
| A. | laser separation |
| B. | chromatography |
| C. | ionization |
| D. | X-ray |
| Answer» B. chromatography | |
| 2473. |
Formation of negative ion is |
| A. | Exothermic |
| B. | Endothermic |
| C. | energy less |
| D. | neutral |
| Answer» B. Endothermic | |
| 2474. |
Amount of KOH used in combustion analysis is |
| A. | 50% |
| B. | 60% |
| C. | 70% |
| D. | 80% |
| Answer» B. 60% | |
| 2475. |
Number of isotopes occupied by Palladium is |
| A. | seven |
| B. | six |
| C. | nine |
| D. | eleven |
| Answer» C. nine | |
| 2476. |
Number of radioactive isotopes is |
| A. | 30 |
| B. | 40 |
| C. | 50 |
| D. | 60 |
| Answer» C. 50 | |
| 2477. |
Formula showing simplest whole number ratio is |
| A. | scientific |
| B. | mathematical |
| C. | molecular |
| D. | empirical |
| Answer» E. | |
| 2478. |
Unstable isotopes are produced by artificial |
| A. | Disintegration |
| B. | splitting |
| C. | energy less |
| D. | absorbance |
| Answer» B. splitting | |
| 2479. |
Ascorbic acid is another name for vitamin |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 2480. |
Ions having positive charges are |
| A. | captions |
| B. | anions |
| C. | molecules |
| D. | atoms |
| Answer» B. anions | |
| 2481. |
Relationships which can be studied by stoichiometry are |
| A. | 6 |
| B. | 5 |
| C. | 4 |
| D. | 3 |
| Answer» E. | |
| 2482. |
A macromolecule found in blood is |
| A. | Ferritin |
| B. | albumin |
| C. | Hemoglobin |
| D. | Keratin |
| Answer» D. Keratin | |
| 2483. |
C₃H₄O₃ is empirical formula for vitamin |
| A. | C |
| B. | A |
| C. | B |
| D. | D |
| Answer» B. A | |
| 2484. |
Mass of one mole of water molecule is |
| A. | 22g |
| B. | 28g |
| C. | 20g |
| D. | 18g |
| Answer» E. | |
| 2485. |
Molecules expressed by formula unit mass are |
| A. | atoms |
| B. | neutral gases |
| C. | covalent |
| D. | ionic |
| Answer» E. | |
| 2486. |
Moleis defined as mass of an element divided by |
| A. | Molar mass |
| B. | atomic number |
| C. | atomic mass |
| D. | empirical formula |
| Answer» B. atomic number | |
| 2487. |
Number of isotopes which oxygen atom has, are |
| A. | three |
| B. | five |
| C. | nine |
| D. | two |
| Answer» B. five | |
| 2488. |
Ordinary microscope can measure up to |
| A. | 400nm |
| B. | 500nm |
| C. | 200nm |
| D. | 700nm |
| Answer» C. 200nm | |
| 2489. |
Relative number of ions in mass spectrometer is plotted as |
| A. | shells |
| B. | z axis |
| C. | abscissa |
| D. | ordinate |
| Answer» E. | |
| 2490. |
Number of unstable isotopes are |
| A. | 300 |
| B. | 50 |
| C. | 370 |
| D. | 360 |
| Answer» B. 50 | |
| 2491. |
Isotopes present in nature are |
| A. | 270 |
| B. | 280 |
| C. | 290 |
| D. | 300 |
| Answer» C. 290 | |
| 2492. |
Empirical formula of benzene is similar to |
| A. | water |
| B. | glycerin |
| C. | hydrogen peroxide |
| D. | glucose |
| Answer» D. glucose | |
| 2493. |
'Atom' name was given by |
| A. | Democritus |
| B. | Bohr |
| C. | Rutherford |
| D. | Archimedes |
| Answer» B. Bohr | |
| 2494. |
A synthetic rubber is having__________weight. |
| A. | Higher resistance |
| B. | Lower density |
| C. | Higher molecular |
| D. | Higher atomic |
| Answer» D. Higher atomic | |
| 2495. |
What is NBR? |
| A. | Normal Acrylonitrile-butadiene rubber |
| B. | Natural Acrylonitrile-butadiene rubber |
| C. | N Acrylonitrile-butane rubber |
| D. | Acrylonitrile-butadiene rubber |
| Answer» E. | |
| 2496. |
How will you define the process of Vulcanization? |
| A. | Sample of butane mixed with sulphur and litharge |
| B. | Sample of propane mixed with sulphur and litharge |
| C. | Sample of plastic formed carbon mixed with sulphur and litharge |
| D. | Sample of rubber mixed with sulphur and litharge |
| Answer» E. | |
| 2497. |
Natural rubber is a ________ which is having high elasticity. |
| A. | Substance |
| B. | Material |
| C. | Elastomer |
| D. | Chemical using carbon as main compound |
| Answer» D. Chemical using carbon as main compound | |
| 2498. |
Which acid is present in lemon? |
| A. | marlic acid |
| B. | citric acid |
| C. | lactic acid |
| D. | tartaric acid |
| Answer» C. lactic acid | |
| 2499. |
Most commonly used Rodenticides are _______ in nature. |
| A. | Anti pesticides |
| B. | Anti solvent |
| C. | Anti Coagulant |
| D. | Non anti coagulant |
| Answer» D. Non anti coagulant | |
| 2500. |
What is Rodenticide? |
| A. | A medicine to kill worms |
| B. | A medicine to kill animals |
| C. | A lubricant |
| D. | A pesticide |
| Answer» E. | |