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. |
Increased surface area would |
| A. | decrease the rate of evaporation |
| B. | increase the rate of evaporation |
| C. | disturb the rate of evaporation |
| D. | not affect the rate of evaporation |
| Answer» C. disturb the rate of evaporation | |
| 2. |
If two forces of 10 N and 5 N are acting on an object in a same direction, what will be the total force acting on the object? |
| A. | 15 N |
| B. | 10 N |
| C. | 5 N |
| D. | 50 N |
| Answer» B. 10 N | |
| 3. |
Enzymes are biological |
| A. | catalysts |
| B. | substrate |
| C. | All of Above |
| D. | products |
| Answer» B. substrate | |
| 4. |
The image formed by a projector would be |
| A. | virtual, upright, diminished |
| B. | inverted, real, diminished |
| C. | real, inverted, magnified |
| D. | virtual, upright, magnified |
| Answer» D. virtual, upright, magnified | |
| 5. |
Giant ionic structures is also name given to |
| A. | crystal lattice |
| B. | ionic lattice |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 6. |
Carothers was great chemist but he was |
| A. | swallowed cyanide |
| B. | prone to depression |
| C. | all of them |
| D. | committed suicide |
| Answer» D. committed suicide | |
| 7. |
The first law of thermodynamics states that energy can not be |
| A. | destroyed |
| B. | created |
| C. | none |
| D. | both a and b |
| Answer» E. | |
| 8. |
When ions of oposite charges come together to form a crystal lattice is called |
| A. | crystal energy |
| B. | bond energy |
| C. | all of them |
| D. | lattice energy |
| Answer» E. | |
| 9. |
The atoms of element convert into ions upon being |
| A. | vaporized |
| B. | distilled |
| C. | none |
| D. | solidified |
| Answer» B. distilled | |
| 10. |
As the pendulum bob swings, some of its energy is converted into |
| A. | Thermal Energy |
| B. | Sound Energy |
| C. | Kinetic Energy |
| D. | Light Energy |
| Answer» B. Sound Energy | |
| 11. |
Particular element posses same number of electrons hence have same |
| A. | physical properties |
| B. | chemical properties |
| C. | All of Above |
| D. | density |
| Answer» C. All of Above | |
| 12. |
Speed is defined as |
| A. | The rate of change of distance |
| B. | The change of distance with respect to time |
| C. | All of the above |
| D. | Distance moved per unit time |
| Answer» D. Distance moved per unit time | |
| 13. |
The moment of a torque is the product of |
| A. | Height of the hinge from the flour to the top |
| B. | Perpendicular distance from the pivot and the action of the force |
| C. | From the line of bottom to the action of force |
| D. | Perpendicular distance to the pivot from the bottom |
| Answer» C. From the line of bottom to the action of force | |
| 14. |
Acid ionizes and form hydrogen ions when dissolved in |
| A. | base |
| B. | water |
| C. | alkali |
| D. | alcohol |
| Answer» C. alkali | |
| 15. |
If the density of a liquid is 20 g cm |
| A. | 50 Pascals |
| B. | 8 Pascals |
| C. | 2 Pascals |
| D. | 800 Pascals |
| Answer» E. | |
| 16. |
Every atom of silicon is held together in a silicon molecule with strong |
| A. | ionic bond |
| B. | covalent bond |
| C. | none |
| D. | co-ordinate bond |
| Answer» C. none | |
| 17. |
Value of pH is accurately determined by |
| A. | pH detector |
| B. | pH electrode |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 18. |
The number of single unpaired electron in non-metals are |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» C. 4 | |
| 19. |
Poisonous gases are formed with reactions of halogens and sulfuric acid that's why it should be handled |
| A. | with adult super vision |
| B. | with care |
| C. | all of them |
| D. | with ventilated laboratory |
| Answer» D. with ventilated laboratory | |
| 20. |
The attempt in ionic bond formation is |
| A. | to attain configuration of noble gases |
| B. | to get rid of excess electrons |
| C. | All of Above |
| D. | to avoid further reactions |
| Answer» B. to get rid of excess electrons | |
| 21. |
The specific latent heat of fusion is equal to |
| A. | mass of the substance × latent heat of fusion |
| B. | latent heat of fusion ⁄ mass of the substance |
| C. | heat capacity ⁄ mass of the substance |
| D. | mass of the substance × heat capacity |
| Answer» C. heat capacity ⁄ mass of the substance | |
| 22. |
George has a weight of 500 N, which his half of his fathers weight. He, his father and his uncle sit on a see-saw. If both George and his father sit on the right end of the see-saw, 5 m from the pivot, and his uncles weight is same as his fathers, where should Georges uncle sit in order to achieve a state of balance? |
| A. | 7.5 m from the pivot, on the left end |
| B. | 7.5 m from the pivot, on the right end |
| C. | 5 m from the pivot, on the left end |
| D. | 5 m from the pivot, on the right end |
| Answer» B. 7.5 m from the pivot, on the right end | |
| 23. |
Acid rain has effects on |
| A. | building |
| B. | plants |
| C. | all of them |
| D. | drinking water |
| Answer» D. drinking water | |
| 24. |
Electrical voltage or E.M.F (Electro Motive Force) is a physical property of |
| A. | Thermocouple thermometer |
| B. | Mercury-in-glass thermometer |
| C. | Constant-volume gas thermometer |
| D. | Resistance thermometer |
| Answer» B. Mercury-in-glass thermometer | |
| 25. |
Elements which are found in d block of periodic table are called |
| A. | transition elements |
| B. | noble gases |
| C. | none |
| D. | alkalis |
| Answer» B. noble gases | |
| 26. |
Complete transfer of one or more electrons from one atom to different atom forms |
| A. | covalent bonds |
| B. | ionic bonds |
| C. | Co-ordinate bonding |
| D. | metallic bonding |
| Answer» C. Co-ordinate bonding | |
| 27. |
The SI Unit for current is |
| A. | Watts |
| B. | Volts |
| C. | Ampere |
| D. | Ohms |
| Answer» D. Ohms | |
| 28. |
The SI unit for energy is |
| A. | Joules |
| B. | Newton |
| C. | Watts |
| D. | Ohms |
| Answer» B. Newton | |
| 29. |
The removal of electron one by one from an atom by specific sequence of ionization energies are termed as |
| A. | successive ionization changes |
| B. | successive ionization energies |
| C. | ionization |
| D. | successive ionization replacement |
| Answer» C. ionization | |
| 30. |
The carbonyl group in aldehyde is |
| A. | C-O |
| B. | C=O |
| C. | CHO |
| D. | CO |
| Answer» C. CHO | |
| 31. |
Hydrochloric acid completely ionized in solution hence it is |
| A. | strong monobasic acid |
| B. | weak monobasic acid |
| C. | strong monoacid base |
| D. | weak monoacid base |
| Answer» B. weak monobasic acid | |
| 32. |
The volume of glass is 15 m |
| A. | 37500 kg |
| B. | 3750 kg |
| C. | 375 kg |
| D. | 4 x 10 |
| E. | |
| Answer» B. 3750 kg | |
| 33. |
Phenolphthalein changes color in |
| A. | alkalis |
| B. | acids |
| C. | none |
| D. | both a and b |
| Answer» B. acids | |
| 34. |
Time required for the concentration of reactant to fall down to its half value from original value is |
| A. | half life |
| B. | reaction life |
| C. | ideal life |
| D. | half reactant |
| Answer» B. reaction life | |
| 35. |
Ionic compounds possess the properties |
| A. | brittle |
| B. | hard |
| C. | All of Above |
| D. | soluble |
| Answer» D. soluble | |
| 36. |
Pressure is defined as |
| A. | force acting per unit area |
| B. | area covered per unit force |
| C. | force acting per unit distance |
| D. | distance covered per unit force |
| Answer» B. area covered per unit force | |
| 37. |
The sum of proton number and neutrons in an atom gives off |
| A. | mass number |
| B. | nucleon number |
| C. | atomic number |
| D. | both a and b |
| Answer» E. | |
| 38. |
An increase in the nuclear charge down the Group II |
| A. | the shielding effect decreases |
| B. | makes the loss of outer electrons possible |
| C. | All of Above |
| D. | distance from the outer electrons increases |
| Answer» B. makes the loss of outer electrons possible | |
| 39. |
As nitrogen oxides are pollutants they case |
| A. | photochemical smog |
| B. | acid rain |
| C. | none |
| D. | both a and b |
| Answer» E. | |
| 40. |
The process of thermal energy transfer through molecular vibration or free electron diffusion in solids is termed as |
| A. | Convection |
| B. | Conduction |
| C. | Conduction and Radiation |
| D. | Radiation |
| Answer» C. Conduction and Radiation | |
| 41. |
Six carbon atoms when arranged in a hexagon and each carbon atom is further attached to hydrogen atom is the molecule of |
| A. | oxygen |
| B. | benzene |
| C. | ethene |
| D. | propane |
| Answer» C. ethene | |
| 42. |
The most volatile element is |
| A. | fluorine |
| B. | iodine |
| C. | chlorine |
| D. | bromine |
| Answer» B. iodine | |
| 43. |
HCl is mostly visible in form of |
| A. | white fumes |
| B. | blue fumes |
| C. | purple fumes |
| D. | grey fumes |
| Answer» B. blue fumes | |
| 44. |
While forming magnesium oxide, magnesium |
| A. | looses more than one electron |
| B. | looses one electron |
| C. | gains more than one electrons |
| D. | gains one electron |
| Answer» B. looses one electron | |
| 45. |
the oxidation number of S in SCl |
| A. | +3 |
| B. | +2 |
| C. | +5 |
| D. | +4 |
| Answer» C. +5 | |
| 46. |
As the metallic radii increase in Group II, the melting point |
| A. | decreases |
| B. | increases |
| C. | None of Above |
| D. | remains contant |
| Answer» B. increases | |
| 47. |
Thermal energy always flows from |
| A. | a region of lower temperature to a region of higher temperature |
| B. | a region of higher temperature to a region of lower temperature |
| C. | a region of low concentration to high concentration |
| D. | a region of high concentration to low concentration |
| Answer» C. a region of low concentration to high concentration | |
| 48. |
Carbonyl compounds are |
| A. | ketones |
| B. | aldehydes |
| C. | alcohols |
| D. | both a and b |
| Answer» E. | |
| 49. |
The positive charge on the nucleus down the group II |
| A. | decreases |
| B. | increases |
| C. | None of Above |
| D. | remains same |
| Answer» C. None of Above | |
| 50. |
The electro negativity of chlorine is |
| A. | 1 |
| B. | 3 |
| C. | 4 |
| D. | 2 |
| Answer» C. 4 | |