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.
| 1. |
---------- proposed the first atomic theory ? |
| A. | E.Rutherford |
| B. | De Broglie |
| C. | John Dalton |
| D. | D.I.Mendeleef |
| Answer» D. D.I.Mendeleef | |
| 2. |
What is used to produce artificial rain ? |
| A. | copper oxide |
| B. | carbon monoxide |
| C. | silver iodide |
| D. | silver nitrate |
| Answer» D. silver nitrate | |
| 3. |
which among the following is necessary to solve the food problem of the country? |
| A. | Increased production and storage of food grains. |
| B. | Easy access of people to the food grain |
| C. | People should have money to purchase the grains. |
| D. | All of the above. |
| Answer» E. | |
| 4. |
Which nutrient is not available in fertilizers? |
| A. | Nitrogen |
| B. | Phosphorus |
| C. | Iron |
| D. | Potassium |
| Answer» D. Potassium | |
| 5. |
The main buffer system of the human blood is |
| A. | H2co3 - hco3 |
| B. | H2co3 - co32- |
| C. | Ch3cooh - ch3coo- |
| D. | Nh2conh2 - nh2conh+ |
| Answer» B. H2co3 - co32- | |
| 6. |
The mass of one Avogadro number of helium atom is |
| A. | 1.00 gram |
| B. | 4.00 gram |
| C. | 8.00 gram |
| D. | 4 x 6.02 x 1023 gram |
| Answer» E. | |
| 7. |
Which of these illustrates the Secondary Structure of a Protein? |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 8. |
Iodine can be separated from a mixture of Iodine and Potassium Chloride by ? |
| A. | Filtration |
| B. | Distillation |
| C. | Sublimation |
| D. | Sedimentation |
| Answer» D. Sedimentation | |
| 9. |
What is laughing gas ? |
| A. | Nitric oxide |
| B. | Nitrous oxide |
| C. | Nitrogen oxide |
| D. | Nitrogen peroxide |
| Answer» C. Nitrogen oxide | |
| 10. |
Why is phosphorus kept under water ? |
| A. | To make it wet |
| B. | To make it durable |
| C. | Water forms a protective coating on it |
| D. | To save it from catching fire when exposed to dry air |
| Answer» E. | |
| 11. |
The main chemical constituent of clay is ? |
| A. | Zeolites |
| B. | Silicon oxide |
| C. | Aluminium silicate |
| D. | Aluminium borosilicate |
| Answer» D. Aluminium borosilicate | |
| 12. |
Which element found in all organic compounds ? |
| A. | Carbon |
| B. | Calcium |
| C. | Nitrogen |
| D. | None of them |
| Answer» B. Calcium | |
| 13. |
The chemical used as a fixer in photography is ? |
| A. | Borax |
| B. | Sodium sulphate |
| C. | Ammonium sulphate |
| D. | Sodium thiosulphate |
| Answer» E. | |
| 14. |
Which one of the following gas is readily soluble in water at room temperature ? |
| A. | Chlorine |
| B. | Nitrogen |
| C. | Ammonia |
| D. | Carbon dioxide |
| Answer» E. | |
| 15. |
What are the Monomers that make up Proteins? |
| A. | Amino acids |
| B. | Nucleotides |
| C. | Disaccharides |
| D. | Chaperones |
| Answer» B. Nucleotides | |
| 16. |
The metal used to recover copper from a solution of copper sulphate is ? |
| A. | Fe |
| B. | Ag |
| C. | Hg |
| D. | Na |
| Answer» B. Ag | |
| 17. |
The hydronium ion is |
| A. | H+ |
| B. | Ho - |
| C. | H2+ |
| D. | H3o+ |
| Answer» E. | |
| 18. |
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is |
| A. | 5x/36 |
| B. | 5x |
| C. | 7.2 x |
| D. | X/6 |
| Answer» B. 5x | |
| 19. |
The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is |
| A. | 1.568 x 103 |
| B. | 6.023 x 1019 |
| C. | 4.84 x 1017 |
| D. | 6.023 x 1023 |
| Answer» C. 4.84 x 1017 | |
| 20. |
Which of the following phenomenon is considered responsible for Global Warming? |
| A. | Greenhouse effect |
| B. | Fire in coal mines |
| C. | Dry farming |
| D. | Monsoon |
| E. | Trade winds |
| Answer» B. Fire in coal mines | |
| 21. |
The enzyme in whosepresence glucose and fructose are converted into alcohol is |
| A. | Diastase |
| B. | Maltase |
| C. | Invertase |
| D. | Zymase |
| Answer» E. | |
| 22. |
Stainless steel contains steel and |
| A. | Manganese |
| B. | Vanadium |
| C. | Nickel |
| D. | Chromium |
| Answer» E. | |
| 23. |
The difference between a nuclear reactor and atomic bomb is that ___________ |
| A. | No chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction |
| B. | The chain reaction in nuclear reactor is controlled |
| C. | The chain reaction in nuclear reactor is not controlled |
| D. | No-chain reaction takes place in atomic bomb while it takes place in nuclear reactor |
| Answer» C. The chain reaction in nuclear reactor is not controlled | |
| 24. |
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of |
| A. | P-electrons in ne(z = 10) |
| B. | S-electrons in mg(z = 12) |
| C. | D-electrons in fe(z = 26) |
| D. | P-electrons in ci(z = 17) |
| Answer» E. | |
| 25. |
Among the given nutrients, milk is a poor source of |
| A. | Calcium |
| B. | Protein |
| C. | Vitamin c |
| D. | Carbohydrates |
| Answer» D. Carbohydrates | |
| 26. |
Brass gets discoloured in air because of the presence of which of the following gases in air ? |
| A. | Hydrogen sulphide |
| B. | Oxygen |
| C. | Nitrogen |
| D. | Carbon dioxide |
| Answer» B. Oxygen | |
| 27. |
Which one of the following mixture is homogeneous |
| A. | Starch and sugar |
| B. | Methanol and water |
| C. | Graphite and charcoal |
| D. | Calcium carbonate and calcium bicarbonate |
| Answer» C. Graphite and charcoal | |
| 28. |
Cobalt - 60 is commonly used in radiation therapy because it emits |
| A. | Alpha - rays |
| B. | Beta rays |
| C. | Gamma rays |
| D. | X - rays |
| Answer» D. X - rays | |
| 29. |
The isotopes of chlorine with mass number 35 and 37 exist in the ratio of |
| A. | 1:2 |
| B. | 2:3 |
| C. | 3:1 |
| D. | 3:4 |
| Answer» D. 3:4 | |
| 30. |
The bleeding of a wound is stopped by the application of ferric chloride because_____ |
| A. | Ferric chloride seals the blood vessels |
| B. | Blood starts flowing in the opposite direction |
| C. | Blood reacts and a solid is formed which seals the blood vessels |
| D. | Blood is coagulated and the blood vessels are sealed |
| Answer» E. | |
| 31. |
Which of the following atoms has the largest radius? |
| A. | Br |
| B. | K |
| C. | Na |
| D. | Cl |
| Answer» C. Na | |
| 32. |
What is the element present in urea |
| A. | C,h,o |
| B. | C,n,o |
| C. | C,n,h |
| D. | C,o,n,h |
| Answer» E. | |
| 33. |
The enzyme that converts glucose to ethyl alcohol is |
| A. | Maltase |
| B. | Zymase |
| C. | Diastase |
| D. | Invertase |
| Answer» C. Diastase | |
| 34. |
PAS is a drug used in the treatment of |
| A. | Tuberculosis |
| B. | Cancer |
| C. | Typhoid |
| D. | Malaria |
| Answer» B. Cancer | |
| 35. |
The pH of pure water is nearly 7.It will increase on the addition of |
| A. | Ammonia |
| B. | Cane sugar |
| C. | Common salt |
| D. | Hydrochloric acid |
| Answer» B. Cane sugar | |
| 36. |
The molecular formula of phosphorous is |
| A. | P1 |
| B. | P2 |
| C. | P3 |
| D. | P4 |
| Answer» E. | |
| 37. |
The ionic radii of N3-, O2-, F- and Na+ follows the order |
| A. | N3- > o2- > f- > na+ |
| B. | N3- > na+ > o2- > f- |
| C. | Na+ > o2- > n3- > f- |
| D. | O2- > f- > na+ > n3- |
| Answer» B. N3- > na+ > o2- > f- | |
| 38. |
The metal does not give H2 on treatment with dilute HCL is |
| A. | Zn |
| B. | Fe |
| C. | Ag |
| D. | Ca |
| Answer» D. Ca | |
| 39. |
The M.K.S. system was first introduced by |
| A. | Archimedes |
| B. | Eienstein |
| C. | Newton |
| D. | Giorgi |
| Answer» E. | |
| 40. |
Among the following the maximum covalent character is shown by the compound |
| A. | Option 1 |
| B. | Option 2 |
| C. | Option 3 |
| D. | Option 4 |
| Answer» E. | |
| 41. |
What is the third most common gas found in the air we breathe ? |
| A. | Argon |
| B. | Neon |
| C. | Carbondioxide |
| D. | Hydrogen |
| Answer» B. Neon | |
| 42. |
The formula C6H5-CO-CH3 represents |
| A. | Acetone |
| B. | Acetic acid |
| C. | Acetophenone |
| D. | Phenyl acetate |
| Answer» D. Phenyl acetate | |
| 43. |
Ozone layer of atmosphere absorbs: |
| A. | Ultraviolet rays |
| B. | Infra-red rays |
| C. | All radiations of light |
| D. | Cosmic rays. |
| Answer» B. Infra-red rays | |
| 44. |
Which one of the following elements is essential for construction is nuclear reactors |
| A. | Cobalt |
| B. | Nickel |
| C. | Zirconium |
| D. | Tungsten |
| Answer» D. Tungsten | |
| 45. |
When the nucleus of Uranium is bombarded with neutrons, it breaks up into two nuclei of nearly equal mass. this process is called |
| A. | Nuclear fission |
| B. | Nuclear fusion |
| C. | Physical change |
| D. | Artificial radioactivity |
| Answer» B. Nuclear fusion | |
| 46. |
Which one among the following is the heaviest |
| A. | 1 mole of water molecules |
| B. | 1 mole of ammonia molecules |
| C. | 1 mole of sodium atoms |
| D. | 1 mole of hydrogen molecules |
| Answer» D. 1 mole of hydrogen molecules | |
| 47. |
Name the Scientist who stated that matter can be converted into energy |
| A. | Boyle |
| B. | Lavoisier |
| C. | Avogadro |
| D. | Einstein |
| Answer» E. | |
| 48. |
Sodium carbonate crystal lose water molecules this property is called |
| A. | Hygroscopy |
| B. | Deliquescence |
| C. | Efflorescence |
| D. | None of these |
| Answer» D. None of these | |
| 49. |
The purest form of iron is |
| A. | Wrought iron |
| B. | Steel |
| C. | Pig iron |
| D. | Nickel steel |
| Answer» B. Steel | |
| 50. |
The absolute value of charge on electron was determined by |
| A. | J.j.thomson |
| B. | R.a. millikan |
| C. | Rutherford |
| D. | Chadwick |
| Answer» C. Rutherford | |