MCQOPTIONS
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MCQOPTIONS
This section includes 125 Mcqs, each offering curated multiple-choice questions to sharpen your O Level Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A pH of 7 is of |
| A. | salt solution |
| B. | sugar solution |
| C. | None of Above |
| D. | Both A and B |
| Answer» E. | |
| 2. |
Aluminum is preferred in overhead power cables because |
| A. | it acts as an insulator, in case of lightening |
| B. | it is a good conductor |
| C. | it is lighter in weight |
| D. | it prevents accidents |
| Answer» D. it prevents accidents | |
| 3. |
Presence of impurities in ethanol will cause |
| A. | raise the boiling point |
| B. | lower the boiling point |
| C. | lower rate of evaporation |
| D. | the boiling at an exact temperature |
| Answer» B. lower the boiling point | |
| 4. |
Salts are formed when |
| A. | acids neutralize alkalis |
| B. | acids neutralize bases |
| C. | all of these |
| D. | acids react with a metal |
| Answer» D. acids react with a metal | |
| 5. |
If the proton number is 19, the electron configuration will be |
| A. | 2,8,18 |
| B. | 2,8,7 |
| C. | 2,8,8,3 |
| D. | 2,8,8,1 |
| Answer» E. | |
| 6. |
If a force of 50 N is applied across the cross-sectional area of 5 * 10 |
| A. | 20 Pa |
| B. | 1 * 10 |
| C. | Pa |
| D. | 100 Pa |
| E. | 50 Pa |
| Answer» C. Pa | |
| 7. |
The largest artery is |
| A. | Jugular artery |
| B. | Aorta |
| C. | Thoracic aorta |
| D. | Carotid artery |
| Answer» C. Thoracic aorta | |
| 8. |
The electric field strength on a dust particle having charge equal to 8x10 |
| A. | 3 N |
| B. | 2.0x10 |
| C. | N |
| D. | 20 N |
| E. | 5 N |
| Answer» C. N | |
| 9. |
Males have one X and one Y chromosome, |
| A. | X is bigger than Y |
| B. | both chromosomes are of same size |
| C. | Y has some portions missing and therefore, smaller than X |
| D. | Y is bigger then X |
| Answer» D. Y is bigger then X | |
| 10. |
The density of water in kg m |
| A. | 100 |
| B. | 1000 |
| C. | 4000 |
| D. | 10 000 |
| Answer» C. 4000 | |
| 11. |
The quantity R⁄N |
| A. | Boltzmann constant |
| B. | Plank's constant |
| C. | Avogadro's constant |
| D. | gravitational constant |
| Answer» B. Plank's constant | |
| 12. |
Addition of water occurs in |
| A. | hydrolysis |
| B. | condensation |
| C. | osmoregulation |
| D. | transpiration |
| Answer» B. condensation | |
| 13. |
Elastin in the walls of the alveoli is destroyed due to |
| A. | the enlargement of right side of the heart |
| B. | smoker's cough |
| C. | an enzyme secreted by phagocytes in an attempt to get rid of bacteria settling in the lining of lung |
| D. | a decreasing in pulmonary artery occurs |
| Answer» D. a decreasing in pulmonary artery occurs | |
| 14. |
The term "Onkos" refers to |
| A. | mutation |
| B. | change |
| C. | None of above |
| D. | Bulk |
| Answer» E. | |
| 15. |
A shared pair of electrons like Cl |
| A. | single covalent bond |
| B. | ionic bonds |
| C. | diatic bond |
| D. | double covalent bond |
| Answer» B. ionic bonds | |
| 16. |
Consider the equation PbO + NaOH + H |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» B. 1 | |
| 17. |
The molar mass of (NH |
| A. | 124.21g/mol |
| B. | 113.19g/mol |
| C. | 132.139 g/mol |
| D. | 141.39g/mol |
| Answer» D. 141.39g/mol | |
| 18. |
The evaporation of solution of CuSO |
| A. | crystallization of CuSO |
| B. | |
| C. | making it concentrated |
| D. | Both A and B |
| E. | None of These |
| Answer» D. Both A and B | |
| 19. |
"All animals are made of cells" was suggested by |
| A. | Schwann |
| B. | Schneider |
| C. | Virchow |
| D. | Hooke |
| Answer» B. Schneider | |
| 20. |
The replaceable hydrogen atoms in H |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» B. 1 | |
| 21. |
Solvent refers to the |
| A. | a solid which dissolves |
| B. | substance that will dissolve |
| C. | None of Above |
| D. | a liquid which does the dissolving |
| Answer» E. | |
| 22. |
Number of replaceable hydrogen atoms in phosphoric acid is |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» E. | |
| 23. |
The proton number of Fluorine is 9, the electron number is |
| A. | 2,7 |
| B. | 2,5 |
| C. | 2,6 |
| D. | 2,9 |
| Answer» B. 2,5 | |
| 24. |
The valency of Phosphate ion PO |
| A. | -2 |
| B. | -1 |
| C. | -4 |
| D. | -3 |
| Answer» E. | |
| 25. |
In the electrolysis of concentrated HCl, Cl |
| 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. | |
| 26. |
Upon heating, sodium nitrate NaNO |
| A. | nitric acid |
| B. | sodium oxide |
| C. | None of Above |
| D. | sodium hydrogen oxide |
| Answer» D. sodium hydrogen oxide | |
| 27. |
In Na |
| A. | oxygen |
| B. | sodium |
| C. | hydrogen |
| D. | carbon |
| Answer» B. sodium | |
| 28. |
In 10H |
| A. | 150 |
| B. | 130 |
| C. | 220 |
| D. | 180 |
| Answer» E. | |
| 29. |
β |
| A. | neutrons |
| B. | protons |
| C. | muons |
| D. | electrons |
| Answer» E. | |
| 30. |
An Oxygen |
| A. | is needed for the leaves not doing photosynthesis |
| B. | is not needed by the leaves with photosynthesis |
| C. | None of above |
| D. | is needed by the whole plant |
| Answer» B. is not needed by the leaves with photosynthesis | |
| 31. |
Hydrolysis takes place during the |
| A. | formation of glycosidic bond |
| B. | condensation reaction |
| C. | None of above |
| D. | digestion of di and polysaccharides |
| Answer» E. | |
| 32. |
Consider the equation Al |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» B. 1 | |
| 33. |
Consider CaCO |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» C. 4 | |
| 34. |
Chronic bronchitis is often known to occur along with another disease called as |
| A. | Emphysema |
| B. | Asthma |
| C. | tachycardia |
| D. | cretinism |
| Answer» B. Asthma | |
| 35. |
A stone is thrown upwards with initial velocity of 20 ms |
| A. | 30 m |
| B. | 20 m |
| C. | 50 m |
| D. | 40 m |
| Answer» C. 50 m | |
| 36. |
The wavelength of a 65 kg person running at a speed of 3 ms |
| A. | 35 m |
| B. | 34 m |
| C. | 3.5 m |
| D. | 3.4 * 10 |
| E. | m |
| Answer» E. m | |
| 37. |
An electron is travelling at right angles to a uniform magnetic field of flux density 1.2 mT with a speed of 8 * 10 |
| A. | 3.7 cm |
| B. | 3.8 cm |
| C. | 3.5 cm |
| D. | 3.6 cm |
| Answer» C. 3.5 cm | |
| 38. |
The speed of sound in water is 1500 ms |
| A. | 600 km |
| B. | 700 m |
| C. | 750 km |
| D. | 600 m |
| Answer» E. | |
| 39. |
The amount of d.c voltage as compare to V |
| A. | 0.6 |
| B. | 0.5 |
| C. | 0.8 |
| D. | 0.7 |
| Answer» E. | |
| 40. |
A train travelling at 20 ms |
| A. | 700 m |
| B. | 825 m |
| C. | 600 m |
| D. | 650 m |
| Answer» C. 600 m | |
| 41. |
A straight wire of length 0.20 m moves at a steady speed of 3.0 ms |
| A. | 0.06 V |
| B. | 0.5 V |
| C. | 0.04 V |
| D. | 0.05 V |
| Answer» B. 0.5 V | |
| 42. |
A train with a whistle that emits a note of frequency 800 Hz is approaching an observer at speed of 60 ms |
| A. | 980 Hz |
| B. | 978 Hz |
| C. | 900 Hz |
| D. | 950 Hz |
| Answer» C. 900 Hz | |
| 43. |
Plants absorbs nitrate ions essential for growth and make |
| A. | minerals |
| B. | proteins |
| C. | vitamins |
| D. | carbohydrates |
| Answer» C. vitamins | |
| 44. |
The purification of compounds is usually done by chemists for formula analysis by the process of |
| A. | spectrometry |
| B. | gas chromatography |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 45. |
If one end of a molecule attains more negative charge for a short moment a temporary set up is formed called |
| A. | polar set up |
| B. | dipole setup |
| C. | none |
| D. | non-polar setup |
| Answer» C. none | |
| 46. |
The oxidation number of Mg in MgCl |
| A. | +3 |
| B. | +2 |
| C. | +5 |
| D. | +4 |
| Answer» C. +5 | |
| 47. |
Upon reaction of O |
| A. | if the electronegativity of Period 3 elements is above 3.5 |
| B. | if the electronegativity of Period 3 elements is more then 0.5 |
| C. | the higher the difference in electronegativity of O |
| D. | and Period 3 elements. |
| E. | if the electronegativity of Period 3 elements is lower than 1.7 |
| Answer» D. and Period 3 elements. | |
| 48. |
The spinal nerve divides into motor fibers which get connected to |
| A. | optic lobes |
| B. | receptors |
| C. | sensors |
| D. | effectors |
| Answer» E. | |
| 49. |
In a healthy person, excess glucose is |
| A. | converted to glycogen |
| B. | stored inside body |
| C. | not present in diet |
| D. | excreted in urine |
| Answer» B. stored inside body | |
| 50. |
Fungi and bacteria act as |
| A. | secondary consumers |
| B. | primary consumers |
| C. | XX |
| D. | decomposers |
| Answer» E. | |