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. |
Enzymes, antibodies and hormones have very basic need for |
| A. | calcium |
| B. | proteins |
| C. | salts |
| D. | vitamin |
| Answer» C. salts | |
| 2. |
The situation in which ions and molecules are constantly reacting is called |
| A. | constant equilibrium |
| B. | dynamic equilibrium |
| C. | irreversible |
| D. | reversible |
| Answer» C. irreversible | |
| 3. |
The formula MgO shows Mg oxidation number to be |
| A. | +2 |
| B. | +1 |
| C. | −2 |
| D. | −1 |
| Answer» B. +1 | |
| 4. |
CCl3COOH is the strongest of |
| A. | bases |
| B. | acids |
| C. | compounds |
| D. | alkalis |
| Answer» C. compounds | |
| 5. |
Down the group, the melting points of Halogens |
| A. | decrease |
| B. | increase |
| C. | None of Above |
| D. | remain steady |
| Answer» C. None of Above | |
| 6. |
Halogenoarenes are banned due to its |
| A. | unreactiveness |
| B. | degradation |
| C. | all of them |
| D. | non-toxicity |
| Answer» C. all of them | |
| 7. |
Brazil have fewer oil reserves that's why they can grow lot of sugar cane to produce |
| A. | ethanol |
| B. | alcohol |
| C. | sugar |
| D. | glucose |
| Answer» B. alcohol | |
| 8. |
Which of these react vigorously with cold water? |
| A. | Mg(s) |
| B. | Na(s) |
| C. | None of Above |
| D. | both of these |
| Answer» C. None of Above | |
| 9. |
The attraction and repulsion between magnets only or magnets with magnetic material is termed as |
| A. | Friction |
| B. | Tension |
| C. | Magnetic force |
| D. | Electrical force |
| Answer» D. Electrical force | |
| 10. |
Sound is a bad example of |
| A. | longitudinal waves |
| B. | transverse waves |
| C. | none of the waves |
| D. | both transverse and longitudinal waves |
| Answer» C. none of the waves | |
| 11. |
The lattice energy is always |
| A. | exothermic |
| B. | endothermic |
| C. | none |
| D. | both a and b |
| Answer» B. endothermic | |
| 12. |
Which one of the following factors do not affect the rate of evaporation? |
| A. | Humidity of the surrounding air |
| B. | Temperature of the liquid |
| C. | Surface of the liquid |
| D. | Depth of the liquid |
| Answer» E. | |
| 13. |
Amino acids which are not made by enzymes in our body are called |
| A. | non-essential amino acids |
| B. | essential amino acids |
| C. | none |
| D. | polymers |
| Answer» C. none | |
| 14. |
Variety of ceramics is made by |
| A. | silicon(II) oxide |
| B. | silicon dioxide |
| C. | none |
| D. | both a and b |
| Answer» E. | |
| 15. |
In ethane, C |
| A. | 1 π-bond is formed |
| B. | no π-bond is formed |
| C. | 3 π-bonds are formed |
| D. | 2 π-bonds are formed |
| Answer» B. no π-bond is formed | |
| 16. |
Another form of calcium carbonate which is used to make expensive tiles for decoration is |
| A. | calcium chloride |
| B. | limestone |
| C. | graphite |
| D. | marble |
| Answer» E. | |
| 17. |
The formula for specific heat capacity is |
| A. | q = m/Δθ where m is mass |
| B. | h = Δθ/m, where m is mass |
| C. | c = 1/m(Q/Δθ) |
| D. | c = 1/h(Δθ) |
| Answer» D. c = 1/h(Δθ) | |
| 18. |
Iodine is the least volatile Halogen, due to |
| A. | greater number of electrons in the principal outermost electron shell |
| B. | complex molecular structure |
| C. | All of Above |
| D. | strong van der Walls forces |
| Answer» E. | |
| 19. |
Litmus is used to test either the substance is acid or |
| A. | base |
| B. | alkali |
| C. | none |
| D. | both |
| Answer» C. none | |
| 20. |
ACs are a bad example of |
| A. | convection |
| B. | conduction |
| C. | conduction and radiation both |
| D. | radiation |
| Answer» D. radiation | |
| 21. |
The quantities that have magnitude only are termed as |
| A. | Vector quantities |
| B. | Scalar quantities |
| C. | Derived quantities |
| D. | Physical quantities |
| Answer» C. Derived quantities | |
| 22. |
The mass of substance which has been produced at electrode is directly proportional to quantity of electricity passed is |
| A. | Faraday's second law |
| B. | Faraday's first law |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 23. |
The production of energy in fuel cell as compare to petrol engine is considerably |
| A. | low |
| B. | high |
| C. | constant |
| D. | same |
| Answer» C. constant | |
| 24. |
Charge to mass ratio was first calculated by |
| A. | Thomas Edison |
| B. | J.J.Thomas |
| C. | none |
| D. | J.K Thomas |
| Answer» C. none | |
| 25. |
The conductivity of electric current increases across metals of period 3 from sodium to |
| A. | aluminum |
| B. | potassium |
| C. | carbon |
| D. | boron |
| Answer» B. potassium | |
| 26. |
The range of measuring tape is |
| A. | several meters |
| B. | 1 meter |
| C. | half meter |
| D. | two meters |
| Answer» B. 1 meter | |
| 27. |
During the process of boiling, what causes the liquid to turn into gas? |
| A. | The decrease in the rate of kinetic energy |
| B. | The weakness of intermolecular bonds |
| C. | The increase in the collision of particles |
| D. | The decrease in the rate of vibration of particles |
| Answer» C. The increase in the collision of particles | |
| 28. |
Ammonium compounds constitutes very important |
| A. | plastic |
| B. | fertilizers |
| C. | chemicals |
| D. | glass |
| Answer» C. chemicals | |
| 29. |
Sorensen used word Potenz which means |
| A. | power |
| B. | concentration |
| C. | all of them |
| D. | ion |
| Answer» B. concentration | |
| 30. |
Air resistance is a |
| A. | gravitational force |
| B. | frictional force |
| C. | balanced force |
| D. | backward force |
| Answer» C. balanced force | |
| 31. |
Protons are deflected from anode which reveals their |
| A. | negative charge |
| B. | positive charge |
| C. | all |
| D. | neutral charge |
| Answer» C. all | |
| 32. |
The oxidation number of any isolated element is |
| A. | zero |
| B. | unit |
| C. | null |
| D. | infinite |
| Answer» B. unit | |
| 33. |
At room temperatures, which are better electrical conductors? |
| A. | Germanium (Ge) |
| B. | Silicon (Si) |
| C. | Tin (Sn) |
| D. | Carbon (C ) |
| Answer» D. Carbon (C ) | |
| 34. |
The mass of a car is 500 kg, which is lifted up by a crane at a height of 200 m, the gravity is 10 N kg |
| A. | 10000 J |
| B. | 1000000 J |
| C. | 25 J |
| D. | 4 J |
| Answer» C. 25 J | |
| 35. |
In electrolysis of pure ionic molten compounds, metal is formed at |
| A. | cathode |
| B. | anode |
| C. | none |
| D. | both a and b |
| Answer» B. anode | |
| 36. |
Number of contact points are more in |
| A. | pentane |
| B. | 2,2 dimethyl propane |
| C. | methane |
| D. | ethane |
| Answer» B. 2,2 dimethyl propane | |
| 37. |
A fan keeps working for 30 minutes and uses energy of 90000 J, the power consumed by the bulb is |
| A. | 50 W |
| B. | 3000 W |
| C. | 300 W |
| D. | 500 W |
| Answer» B. 3000 W | |
| 38. |
According to kinetic molecular model, in solids, |
| A. | The particles occur in clusters with molecules slightly further apart |
| B. | The particles are closely packed together, they occupy minimum space and are usually arranged in a r |
| C. | The movement of particles is high speed and random |
| D. | The molecules are very far apart and occupy all the space made available to them |
| Answer» C. The movement of particles is high speed and random | |
| 39. |
In electrochemical cell the movement of ions is inhibited by a |
| A. | electrode |
| B. | salt bridge |
| C. | all of them |
| D. | solution |
| Answer» C. all of them | |
| 40. |
Which statement is incorrect? Enzymes |
| A. | raise the activation energy |
| B. | speed up reactions without being used up |
| C. | are action-specific |
| D. | are all large molecules |
| Answer» B. speed up reactions without being used up | |
| 41. |
Nucleophile is regarded as |
| A. | donator |
| B. | acceptor |
| C. | spectator |
| D. | mutual share |
| Answer» B. acceptor | |
| 42. |
The smell of blue cheese is due to a ketone |
| A. | heptan-3 one |
| B. | heptan-2 one |
| C. | hexa-2 one |
| D. | heptan-2 ol |
| Answer» C. hexa-2 one | |
| 43. |
In which of the following, the speed of sound is least? |
| A. | Liquid |
| B. | Air |
| C. | Vacuum |
| D. | Solid |
| Answer» C. Vacuum | |
| 44. |
In symbols the formula of acceleration is |
| A. | a = v-u/t |
| B. | a = v/t |
| C. | a = u/v-t |
| D. | a = u-v/t |
| Answer» B. a = v/t | |
| 45. |
The major nitrogen based fertilizer formed from ammonia and nitric acid is |
| A. | ammonium nitrate |
| B. | Ammonium chloride |
| C. | ammonium carbonate |
| D. | ammonium sulfate |
| Answer» B. Ammonium chloride | |
| 46. |
A car stopped screeching to avoid the crash with a van, what change is involved in those process? |
| A. | Kinetic Energy is converted into sound and thermal energy |
| B. | Kinetic energy is converted into sound energy |
| C. | Kinetic and potential energy is converted into thermal and sound energy |
| D. | Potential energy is converted into sound, heat and kinetic energy |
| Answer» B. Kinetic energy is converted into sound energy | |
| 47. |
For a constant frequency, the wavelength of an electromagnetic wave is |
| A. | inversely proportional to its velocity |
| B. | directly proportional to its velocity |
| C. | None of the above |
| D. | independent of its velocity |
| Answer» C. None of the above | |
| 48. |
A laboratory thermometer has l |
| A. | 40 °C |
| B. | 20 °C |
| C. | 80 °C |
| D. | 60 °C |
| Answer» D. 60 °C | |
| 49. |
Air trapped inside a single-piston-cylinder exerts a pressure of 760 mmHg. If its volume is increased at a constant temperature such that the final the pressure is equal to 543 mmHg then increase in volume is equal to |
| A. | 0.3 |
| B. | 0.2 |
| C. | 0.5 |
| D. | 0.4 |
| Answer» E. | |
| 50. |
Pressure of gas is due to the |
| A. | collision of gas molecules with each other |
| B. | random motion of gas molecules |
| C. | vibration of solid particles in the wall of container |
| D. | collision of gas molecules with the wall of container |
| Answer» E. | |