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. |
Bacteria decompose dead plants and algae by their increase growth rate and using |
| A. | carbon dioxide |
| B. | dissolved oxygen |
| C. | nutrients |
| D. | nitrogen |
| Answer» C. nutrients | |
| 2. |
The electrical force exerted by two point charges on each other is inversely proportional to |
| A. | product of their charges |
| B. | sum of their charges |
| C. | square of distance between them |
| D. | distance between them |
| Answer» D. distance between them | |
| 3. |
The formula of sodium hydroxide is |
| A. | NaOH2 |
| B. | NaHo |
| C. | None of Above |
| D. | NaOH |
| Answer» E. | |
| 4. |
The magnitude of ionization energy depends upon |
| A. | shielding effect increases |
| B. | number of positive charges |
| C. | All of Above |
| D. | spin pair repulsion |
| Answer» D. spin pair repulsion | |
| 5. |
Consider the equation: Mg(s) + H2O → Mg(OH)2 + H2(g). How many moles of Mg(s) will be required to balance the equation? |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» C. 4 | |
| 6. |
Acyl chlorides are made by reacting carboxylic acids with |
| A. | PCl3 |
| B. | PCl5 |
| C. | all of them |
| D. | SOCl2 |
| Answer» D. SOCl2 | |
| 7. |
A magnesium wire resists 2.5 Ω at ice point and 10 Ω at steam point, and the resistance of wire is 4 Ω the room temperature would be |
| A. | 10 °C |
| B. | 20 °C |
| C. | 50 °C |
| D. | 25 °C |
| Answer» C. 50 °C | |
| 8. |
Current in a circuit depends on |
| A. | potential difference |
| B. | resistance |
| C. | none of above |
| D. | both A and B |
| Answer» E. | |
| 9. |
Electrode is |
| A. | plate which carried electricity into the liquid |
| B. | the substance which conducts electricity but remains unchanged chemically |
| C. | all of these |
| D. | a fully ionized liquid that undergoes electrolysis |
| Answer» B. the substance which conducts electricity but remains unchanged chemically | |
| 10. |
Organic solvents do not include |
| A. | water |
| B. | alcohol |
| C. | tetra chloromethane |
| D. | petrol |
| Answer» B. alcohol | |
| 11. |
The smoker's cough is |
| A. | an attempt to move the mucus up the airways |
| B. | a sign of recovery |
| C. | a mixture of bacteria and BCs |
| D. | an attempt to move the air down the airways |
| Answer» B. a sign of recovery | |
| 12. |
While passing hydrogen over heated CuO(s), black color is oxidized to |
| A. | pink color |
| B. | golden color |
| C. | colorless |
| D. | blue color |
| Answer» B. golden color | |
| 13. |
The only force acting on a bouncing ball is |
| A. | weight of ball |
| B. | gravity |
| C. | a and b both |
| D. | friction |
| Answer» D. friction | |
| 14. |
The speed of an object travelling around a circle depends upon |
| A. | radius |
| B. | angular velocity |
| C. | none of above |
| D. | both A and B |
| Answer» E. | |
| 15. |
If an unmarked mercury-in-glass thermometer has l100 23 cm and l0 is 8 cm, if the lθ is 5 cm the temperature of the thermometer would be |
| A. | −20 °C |
| B. | −10 °C |
| C. | −40 °C |
| D. | −30 °C |
| Answer» B. −10 °C | |
| 16. |
SO2 left at the end of contact process should not be escaped as it can cause |
| A. | toxic pollution |
| B. | acid rain |
| C. | none |
| D. | both a and b |
| Answer» E. | |
| 17. |
If the temperature of an object is low the rate of infrared radiations would be |
| A. | low |
| B. | high |
| C. | may vary |
| D. | normal |
| Answer» B. high | |
| 18. |
pH of soil can be controlled through |
| A. | neutralization |
| B. | acid rains |
| C. | reversible reactions |
| D. | hydrolases |
| Answer» B. acid rains | |
| 19. |
Coherent sources emit waves that have |
| A. | decreasing phase difference |
| B. | increasing phase difference |
| C. | varying phase difference |
| D. | constant phase difference |
| Answer» E. | |
| 20. |
The angle of incidence in the optically denser medium for which the angle of refraction in the less dense medium is 90° is termed as |
| A. | covalent angle |
| B. | normal angle |
| C. | internal angle |
| D. | critical angle |
| Answer» E. | |
| 21. |
The compound which is formed by linear overlapping creating sigma bonds only is |
| A. | ethene |
| B. | methane |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 22. |
The hydrogen gas is given off at the cathode, if the solution |
| A. | contains conc. HCl |
| B. | contains dil. HCl |
| C. | None of Above |
| D. | Both A and B |
| Answer» E. | |
| 23. |
The kinetic component in the matter is |
| A. | inversely proportional to mass |
| B. | directly proportional to mass |
| C. | inversely proportional to temperature |
| D. | directly proportional to temperature |
| Answer» E. | |
| 24. |
The formula of Lithium chloride is |
| A. | Li2Cl |
| B. | LiCl2 |
| C. | Li3Cl2 |
| D. | LiCl |
| Answer» E. | |
| 25. |
Plants may not store |
| A. | starch |
| B. | glucose itself |
| C. | protoplasm |
| D. | cellulose |
| Answer» B. glucose itself | |
| 26. |
By refluxing unsubstituted amide with acid it will yield |
| A. | carboxylic acid |
| B. | ammonia |
| C. | none |
| D. | both a and b |
| Answer» E. | |
| 27. |
The speed of a body in particular direction can be called |
| A. | displacement |
| B. | acceleration |
| C. | distance |
| D. | velocity |
| Answer» E. | |
| 28. |
The states of matter are |
| A. | solid, molten |
| B. | solid,liquid,gas |
| C. | solid, gas |
| D. | solid, vapor |
| Answer» C. solid, gas | |
| 29. |
In periodic table, the period number indicates the number of |
| A. | protons |
| B. | neutrons |
| C. | None of Above |
| D. | electrons |
| Answer» D. electrons | |
| 30. |
The SI unit for density is |
| A. | kg ⁄ cm3 |
| B. | g ⁄ cm3 |
| C. | kg ⁄ m3 |
| D. | g ⁄ m3 |
| Answer» D. g ⁄ m3 | |
| 31. |
Electric kettle is a good example of |
| A. | convection |
| B. | conduction |
| C. | conduction and radiation both |
| D. | radiation |
| Answer» B. conduction | |
| 32. |
If forward reaction is feasible then the reverse mechanism is |
| A. | possible |
| B. | not feasible |
| C. | highly probable |
| D. | constant |
| Answer» C. highly probable | |
| 33. |
Other than oxygen and calcium, 92% of the earths crust is made up of |
| A. | Iron |
| B. | silicon |
| C. | all of these |
| D. | Aluminum |
| Answer» D. Aluminum | |
| 34. |
Oxidizing agents does not include |
| A. | potassium manganate |
| B. | potassium iodide |
| C. | bromine solutions |
| D. | potassium dichromate |
| Answer» C. bromine solutions | |
| 35. |
In Ethane C2H4, the repulsive forces are minimized at |
| A. | 109° |
| B. | 120° |
| C. | 87.5° |
| D. | 117° |
| Answer» E. | |
| 36. |
If an object flies into space, its |
| A. | mass would change but weight would remain same |
| B. | mass and weight both would remain same |
| C. | mass and weight both would change |
| D. | mass would remain same but weight would change |
| Answer» E. | |
| 37. |
Artificial diamonds are used for |
| A. | drill tips |
| B. | jewelry |
| C. | none |
| D. | both a and b |
| Answer» E. | |
| 38. |
Hydrocarbons containing double bonds are called |
| A. | alkenes |
| B. | Alkanes |
| C. | ketone |
| D. | arenes |
| Answer» B. Alkanes | |
| 39. |
The presence of impurities in a substance |
| A. | raises its melting point |
| B. | lowers its melting point |
| C. | has no effect on its melting point or boiling point |
| D. | lowers its boiling point |
| Answer» C. has no effect on its melting point or boiling point | |
| 40. |
In the electrolysis of concentrated HCl, Cl2 is given off at cathode due to |
| A. | difficulty of discharging chloride ions |
| B. | difficulty of discharging hydroxide ions |
| C. | ease of discharging chloride ions compared to the hydroxide ions |
| D. | due to high concentration of Chloride ions |
| Answer» E. | |
| 41. |
In calcium chloride, Calcium looses |
| A. | two electrons |
| B. | one electron |
| C. | four electrons |
| D. | three electrons |
| Answer» B. one electron | |
| 42. |
if the reactants are CuCO3 + H2SO4, the products will be |
| A. | H2O |
| B. | CuSO4 |
| C. | all of these |
| D. | CO2 |
| Answer» D. CO2 | |
| 43. |
The law which relates pressure and volume of gas is |
| A. | Avogadro's law |
| B. | charle's law |
| C. | ideal gas law |
| D. | boyle's law |
| Answer» E. | |
| 44. |
Gases heavier than air can be collected through |
| A. | downward delivery |
| B. | upward delivery |
| C. | None of Above |
| D. | downward displacement of air |
| Answer» B. upward delivery | |
| 45. |
According to kinetic molecular model, in liquids, |
| 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» B. The particles are closely packed together, they occupy minimum space and are usually arranged in a r | |
| 46. |
The number of electrons in calcium are 20. The outermost shall will have as many as |
| A. | 1 electron |
| B. | no electrons |
| C. | more than 2 electrons |
| D. | 2 electrons |
| Answer» E. | |
| 47. |
The attractive forces between metal ions and delocalized electrons can be made weaker only at |
| A. | high pressures |
| B. | high temperatures |
| C. | low temperature |
| D. | low pressures |
| Answer» C. low temperature | |
| 48. |
the actual op-amp may have an open loop gain of |
| A. | 105 |
| B. | 102 |
| C. | 104 |
| D. | 103 |
| Answer» B. 102 | |
| 49. |
To separate the components of liquid air, useful procedure is |
| A. | separating funnel |
| B. | centrifugation |
| C. | simple distillation |
| D. | fractional distillation |
| Answer» E. | |
| 50. |
Which Carbon atom number is not part of the ring in C6H12O6 |
| A. | 3 |
| B. | 1 |
| C. | 6 |
| D. | 5 |
| Answer» E. | |