MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The atomic number of carbon is 6 and atomic weight is 12. How many protons are there in its nucleus? |
| A. | 8 |
| B. | 32 |
| C. | 18 |
| D. | 2 |
| Answer» B. 32 | |
| 2. |
Which of the following is an example of a chemical change - 1- Crystallization of sodium chloride 2- Melting of ice 3- Milk coagulation |
| A. | केवल 1 ओर 2 |
| B. | केवल 3 |
| C. | 1, 2 और 3 |
| D. | none of these |
| Answer» C. 1, 2 और 3 | |
| 3. |
Including the Chairman of the Drafting Committee of the Constitution - |
| A. | 7 सदस्य थे |
| B. | 4 सदस्य थे |
| C. | 9 सदस्य थे |
| D. | 3 सदस्य थे |
| Answer» B. 4 सदस्य थे | |
| 4. |
When two electrons are in the same orbital, what is found in them? |
| A. | same spin |
| B. | reverse spin |
| C. | same or opposite rotation |
| D. | no spin |
| Answer» C. same or opposite rotation | |
| 5. |
An example of physical change is |
| A. | Blackening of silverware in the air. |
| B. | candle burning |
| C. | Making curd from milk. |
| D. | dissolving sugar in water |
| Answer» E. | |
| 6. |
The discoverer of neutrino is - |
| A. | anderson |
| B. | Paulie |
| C. | Yukawa |
| D. | goldstein |
| Answer» C. Yukawa | |
| 7. |
How many electrons can reside in the outermost orbit of an atom? |
| A. | 2 |
| B. | 18 |
| C. | 8 |
| D. | no fixed limit |
| Answer» D. no fixed limit | |
| 8. |
Propounded the principle of uncertainty - |
| A. | Einstein |
| B. | heisenberg |
| C. | Paulie |
| D. | rutherford |
| Answer» C. Paulie | |
| 9. |
The particle which acts to bind the nucleon - |
| A. | Positron |
| B. | mason |
| C. | neutron |
| D. | electron |
| Answer» C. neutron | |
| 10. |
The maximum number of electrons in the second orbit of an atom of an element can be - |
| A. | 8 |
| B. | 32 |
| C. | 18 |
| D. | 2 |
| Answer» B. 32 | |
| 11. |
The chemical nature of an element depends on |
| A. | on electron |
| B. | on the proton |
| C. | on passion |
| D. | on valence electrons |
| Answer» E. | |
| 12. |
The discoverers of mesons are - |
| A. | Paulie |
| B. | chadwick |
| C. | Yukawa |
| D. | thomson |
| Answer» D. thomson | |
| 13. |
The fundamental particles involved in the composition of an atom are - |
| A. | Protons, Electrons and Mesons |
| B. | Protons, Electrons and Photons |
| C. | protons, electrons and neutrons |
| D. | Protons, Electrons and Deutrons |
| Answer» D. Protons, Electrons and Deutrons | |
| 14. |
The chemical nature of an element depends on which of the following - |
| A. | on the proton |
| B. | on the valence electron |
| C. | on passion |
| D. | Neither option is true. |
| Answer» C. on passion | |
| 15. |
Atoms that have the same number of protons but different numbers of neutrons are called |
| A. | Isosceles |
| B. | Samneutronic |
| C. | isotopes |
| D. | isobaric |
| Answer» D. isobaric | |
| 16. |
Which two fundamental forces can provide the force of attraction between two neutrons? |
| A. | some other force |
| B. | Gravitational and electrostatic force |
| C. | Gravitational and Nuclear |
| D. | electrostatic and nuclear |
| Answer» D. electrostatic and nuclear | |
| 17. |
In cathode rays ………. |
| A. | mass only |
| B. | both mass and charge |
| C. | surge only |
| D. | neither mass nor charge |
| Answer» C. surge only | |
| 18. |
Which of the following has negative charge - |
| A. | x-rays |
| B. | alpha ray |
| C. | beta ray |
| D. | gamma ray |
| Answer» D. gamma ray | |
| 19. |
Who propounded the atomic theory of matter? |
| A. | newton |
| B. | Dalton |
| C. | pascal |
| D. | Avogadro |
| Answer» C. pascal | |
| 20. |
When was the Constitution of India passed? |
| A. | 26 जनवरी, 1950 को |
| B. | 26 जनवरी, 1949 को |
| C. | 26 नवंबर, 1949 को |
| D. | 31 दिसंबर, 1949 को |
| Answer» D. 31 दिसंबर, 1949 को | |
| 21. |
When there is a bond between two atoms, the energy of the system is - |
| A. | is enhanced. |
| B. | It remains the same. |
| C. | Happens. |
| D. | Increases keeps on decreasing. |
| Answer» D. Increases keeps on decreasing. | |
| 22. |
What determines the chemical properties of an element? |
| A. | number of protons |
| B. | number of electrons |
| C. | number of neutrons |
| D. | all of the above |
| Answer» C. number of neutrons | |
| 23. |
In which of the following is neutron absent? |
| A. | helium |
| B. | hydrogen |
| C. | oxygen |
| D. | beryllium |
| Answer» C. oxygen | |
| 24. |
What causes the paper to turn brown in old books? |
| A. | with frequent use |
| B. | due to lack of circulation |
| C. | due to dust |
| D. | by oxidation of cellulose |
| Answer» E. | |
| 25. |
The elements in which the properties of both metals and non-metals are found are called |
| A. | Metal Alloys |
| B. | slag |
| C. | ideal metal |
| D. | Submetallic |
| Answer» E. | |
| 26. |
The product of equivalent mass and valency of an element is equal to |
| A. | vapor density |
| B. | molar mass |
| C. | atomic mass |
| D. | relative temperature |
| Answer» D. relative temperature | |
| 27. |
When two or more pure substances are mixed in any ratio, |
| A. | Element |
| B. | Compound |
| C. | mix |
| D. | gas |
| Answer» D. gas | |
| 28. |
A substance made by combining two or more than two elements in a fixed ratio with regard to their quantity is called - |
| A. | Element |
| B. | Compound |
| C. | mix |
| D. | Solid |
| Answer» C. mix | |
| 29. |
After the separation of the Muslim League from the Constituent Assembly, the number of its members reduced to - |
| A. | 299 हो गई |
| B. | 329 हो गई |
| C. | 331 हो गई |
| D. | 359 हो गई |
| Answer» B. 329 हो गई | |
| 30. |
Which of the following is a bad conductor of electricity in spite of being a metal? |
| A. | tin |
| B. | Copper |
| C. | lead |
| D. | Nickel |
| Answer» D. Nickel | |
| 31. |
Which of the following is not a part of an atom? |
| A. | electron |
| B. | proton |
| C. | photon |
| D. | neutron |
| Answer» D. neutron | |
| 32. |
Everything in the universe is made up of very fine particles. Who said this first |
| A. | by dalton |
| B. | by avogadro |
| C. | Kanad has |
| D. | by rutherford |
| Answer» D. by rutherford | |
| 33. |
coal is - |
| A. | mix |
| B. | Compound |
| C. | Element |
| D. | none of these |
| Answer» D. none of these | |
| 34. |
Into how many parts is the constitution of India divided? |
| A. | 7 |
| B. | 11 |
| C. | 21 |
| D. | 22 |
| Answer» E. | |
| 35. |
Bleaching powder is - |
| A. | Compound |
| B. | mix |
| C. | Aparup |
| D. | Element |
| Answer» B. mix | |
| 36. |
Ammo is - |
| A. | Element |
| B. | Compound |
| C. | mix |
| D. | liquid |
| Answer» D. liquid | |
| 37. |
Which of the following is a compound - |
| A. | Mercury |
| B. | ammonia |
| C. | ozone |
| D. | Air |
| Answer» C. ozone | |
| 38. |
Which of the following is a chemical compound - |
| A. | Air |
| B. | Mercury |
| C. | oxygen |
| D. | ammonia |
| Answer» E. | |
| 39. |
Which of the following is a mixture - |
| A. | Milk |
| B. | hydrochloric acid |
| C. | steel |
| D. | carbon monoxide |
| Answer» D. carbon monoxide | |
| 40. |
Which is the pure element - |
| A. | cement |
| B. | glass |
| C. | sodium |
| D. | none of these |
| Answer» D. none of these | |
| 41. |
Which of the following is an element - |
| A. | ruby |
| B. | Diamond |
| C. | page |
| D. | sapphire |
| Answer» C. page | |
| 42. |
Which of the following is neither element nor air |
| A. | Air |
| B. | Sodium chloride |
| C. | water |
| D. | Mercury |
| Answer» B. Sodium chloride | |
| 43. |
Water is not effective in extinguishing a fire caused by petrol because- |
| A. | The flame is so hot that water cannot cool it. |
| B. | Water and petrol are immiscible and petrol forms the top layer, hence keeps on burning. |
| C. | Water and petrol are miscible with each other. |
| D. | Chemical reaction takes place in water and petrol. |
| Answer» C. Water and petrol are miscible with each other. | |
| 44. |
Which of the following is a basic element - |
| A. | Sand |
| B. | marble |
| C. | Sugar |
| D. | Diamond |
| Answer» E. | |
| 45. |
In the process of purification, dirty water is treated with alum, this process is called - |
| A. | absorption |
| B. | Absorption |
| C. | Coagulation |
| D. | Emulsification |
| Answer» D. Emulsification | |
| 46. |
Mica is …………. |
| A. | conductor of heat and poor conductor of electricity |
| B. | poor conductor of heat and electricity |
| C. | conductor of both heat and electricity |
| D. | poor conductor of heat and good conductor of electricity |
| Answer» B. poor conductor of heat and electricity | |
| 47. |
Alum stops bleeding on minor cuts, the reason for this is – |
| A. | solvation |
| B. | emulsion |
| C. | dialysis |
| D. | coagulation |
| Answer» E. | |
| 48. |
Impure camphor is purified by - |
| A. | by fractional distillation |
| B. | by Prabhaji Kristen |
| C. | by steam distillation |
| D. | By subtraction |
| Answer» E. | |
| 49. |
Water can be separated from alcohol-water mixture by - |
| A. | by disposal |
| B. | by distillation |
| C. | By subtraction |
| D. | by evaporation |
| Answer» C. By subtraction | |
| 50. |
Chemically dry ice is |
| A. | solid sulfur dioxide |
| B. | distilled water ice |
| C. | mixture of ice and common salt |
| D. | solid carbon dioxide |
| Answer» E. | |