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.
| 351. |
Which of the solid does not contain covalent bond__________________? |
| A. | copper |
| B. | ice |
| C. | diamond |
| D. | graphite |
| Answer» B. ice | |
| 352. |
A solution has pH = 0 its H+ ion concentration is__________________? |
| A. | 1 x 10-1 |
| B. | 1 x 10-14 |
| C. | 1 x 10-7 |
| D. | 1 |
| Answer» E. | |
| 353. |
Which of the following is not characteristics of reversible reaction__________________? |
| A. | whole amount of reactant does not change into product |
| B. | chemical equilibrium is established |
| C. | a catalyst changes the direction of reaction |
| D. | rate of forward reaction decreases as reaction proceeds |
| Answer» D. rate of forward reaction decreases as reaction proceeds | |
| 354. |
Butyl chloride gives possible isomers ? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 355. |
The balanced chemical equation for the reaction which occurs when Be is added to water is____________? |
| A. | Be+2H2O?Be (OH)2+H2 |
| B. | Be+H2O?Be (OH)2+H2 |
| C. | Be+H2O?[Be (OH)4]+2+H2 |
| D. | no reaction |
| Answer» E. | |
| 356. |
When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is______________? |
| A. | 0.33 nm |
| B. | 0.34 nm |
| C. | 0.35 nm |
| D. | 0.36 nm |
| Answer» B. 0.34 nm | |
| 357. |
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 | |
| 358. |
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 | |
| 359. |
Which of the following properties prove that cathode rays are material in nature_________________? |
| A. | they cast shadow |
| B. | they possess momentum |
| C. | they are negatively charged |
| D. | all of the above |
| Answer» C. they are negatively charged | |
| 360. |
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. | |
| 361. |
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. | |
| 362. |
All the following variables are used to describle gases except__________________? |
| A. | pressure |
| B. | volume |
| C. | moles |
| D. | density |
| Answer» E. | |
| 363. |
Dempsters mass spectrometer has number of zones / parts_________________? |
| A. | 5 |
| B. | 4 |
| C. | 3 |
| D. | 2 |
| Answer» B. 4 | |
| 364. |
Molecular ions are formed by passing______________________? |
| A. | High energy electron beam |
| B. | ? – particle |
| C. | X-rays |
| D. | All of the above |
| Answer» E. | |
| 365. |
1 a.m.u =__________________? |
| A. | 1.6 x 10-27 kg |
| B. | 1.6 x 10-24 kg |
| C. | 1.6 x 10-26 kg |
| D. | 1.6 x 10-28 kg |
| Answer» B. 1.6 x 10-24 kg | |
| 366. |
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 | |
| 367. |
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. | |
| 368. |
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 | |
| 369. |
Which of the following is not a macromolecule ? |
| A. | sand |
| B. | haemoglobin |
| C. | diamond |
| D. | maltose |
| Answer» E. | |
| 370. |
How many isotopes have odd atomic number ? |
| A. | 154 |
| B. | 280 |
| C. | 86 |
| D. | 300 |
| Answer» D. 300 | |
| 371. |
Size of molecule depends upon________________? |
| A. | Atomicity |
| B. | Shape of molecule |
| C. | Both A and B |
| D. | Difficult to predict |
| Answer» D. Difficult to predict | |
| 372. |
Percentage of calcium in calcium carbonate is___________________? |
| A. | 80% |
| B. | 30% |
| C. | 40% |
| D. | 20% |
| Answer» D. 20% | |
| 373. |
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 | |
| 374. |
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) | |
| 375. |
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 | |
| 376. |
One mole of CO2 contains? |
| A. | 6.022 x 1023 atoms of oxygen |
| B. | 22-gram electrons |
| C. | 6.022 x 1023 atms of carbon |
| D. | both B. & C. |
| Answer» E. | |
| 377. |
Mostly elements have fractional atomic masses because of______________________? |
| A. | mass of an atom itself is in fraction |
| B. | atomic masses are average masses of isobars |
| C. | atmoic masses are average masses of isotopes proportional to their relative abundance |
| D. | atmoic masses are average masses of isotopes |
| Answer» D. atmoic masses are average masses of isotopes | |
| 378. |
moles of each aluminium and oxygen react with each other to produce aluminium oxide. The amount of product formed is______________________? |
| A. | 0.18 mole |
| B. | 0.27 mole |
| C. | 0.24 mole |
| D. | 0.09 mole |
| Answer» B. 0.27 mole | |
| 379. |
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 | |
| 380. |
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. | |
| 381. |
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 | |
| 382. |
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 | |
| 383. |
Which of the following statements about isotopes is correct ? |
| A. | Isotopes with odd atomic number are abundant |
| B. | Isotopes with odd atomic number and even mass number are abundant |
| C. | Isotopes with even atomic number and even mass number are abundant |
| D. | Isotopes with even atomic number and odd mass no are abundant |
| Answer» D. Isotopes with even atomic number and odd mass no are abundant | |
| 384. |
What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called? |
| A. | Paint |
| B. | Glass |
| C. | Gun Powder |
| D. | Cement |
| Answer» D. Cement | |
| 385. |
Empirical formula of chloroform is____________________? |
| A. | CH2 C12 |
| B. | CH3C1 |
| C. | CC14 |
| D. | CHCL3 |
| Answer» E. | |
| 386. |
The number of isotopes of elements with even mass number and even atomic number are ________________? |
| A. | 280 |
| B. | 300 |
| C. | 154 |
| D. | 54 |
| Answer» D. 54 | |
| 387. |
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 | |
| 388. |
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. | |
| 389. |
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 | |
| 390. |
Which one of the following has the maximum number of isotopes ? |
| A. | oxygen |
| B. | carbon |
| C. | tin |
| D. | chlorine |
| Answer» D. chlorine | |
| 391. |
Which one of the following is not the mono isotopic element ? |
| A. | arsenic |
| B. | uranium |
| C. | iodine |
| D. | nickel |
| Answer» C. iodine | |
| 392. |
The common thing in phthalic acid and oxalic acid is that both are_________________? |
| A. | Aromatic |
| B. | Dicarboxylic |
| C. | Hydrocarbons |
| D. | Strong acids |
| Answer» C. Hydrocarbons | |
| 393. |
Following are the anions of soap which form Ca and Mg ions which we see as curd in water |
| A. | Sodium hexadecanoate |
| B. | Sodium octadecanoate |
| C. | Sodium pentadecanoate |
| D. | Both A & B |
| Answer» E. | |
| 394. |
Reading of a Barometer going down is an indication of:___________? |
| A. | Snow |
| B. | Storm |
| C. | Intense heat |
| D. | Rainfall |
| Answer» E. | |
| 395. |
The acid which is used as ink remover is_________________? |
| A. | Oxalic acid |
| B. | Succinic acid |
| C. | Adipic acid |
| D. | Acetic acid |
| Answer» B. Succinic acid | |
| 396. |
Elements which emit natural radioactivity are known as __________ ? |
| A. | Radio elements |
| B. | Active elements |
| C. | Radioactive elements |
| D. | Nuclear elements |
| Answer» D. Nuclear elements | |
| 397. |
A helium nucleus comprising of two protons and two neutrons with a charge of 2e is _________ ? |
| A. | Beta particle |
| B. | Gamma particle |
| C. | Alpha particle |
| D. | Negative particle |
| Answer» D. Negative particle | |
| 398. |
In SI base units, 1 Bq is equal to __________ ? |
| A. | 10 disintegration per second |
| B. | 1.5 disintegration per second |
| C. | 0.01 disintegration per second |
| D. | 1 disintegration per second |
| Answer» E. | |
| 399. |
Column of manometer which faces liquid is __________ ? |
| A. | Raised |
| B. | Depressed |
| C. | Compressed |
| D. | Remains same |
| Answer» C. Compressed | |
| 400. |
Chromatography is used to separate _________ ? |
| A. | Solution |
| B. | Mixtures |
| C. | Molecules |
| D. | Atoms |
| Answer» C. Molecules | |