MCQOPTIONS
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MCQOPTIONS
This section includes 837 Mcqs, each offering curated multiple-choice questions to sharpen your Grade10 knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A substance that donates a pair of electrons to form a coordinate covalent bond is called |
| A. | Lewis acid |
| B. | Lewis base |
| C. | Bronsted-Lowry acid |
| D. | Bronsted-Lowry base |
| Answer» C. Bronsted-Lowry acid | |
| 2. |
The process in which acids (H+) and bases (OH-) react to form salts and water is called |
| A. | neutralization |
| B. | hydrogenation |
| C. | halogenation |
| D. | sublimation |
| Answer» B. hydrogenation | |
| 3. |
Phenolphthalein in acidic solution is |
| A. | colorless |
| B. | pink colored |
| C. | yellow colored |
| D. | orange colored |
| Answer» B. pink colored | |
| 4. |
Preservatives are used to preserve |
| A. | food |
| B. | acids |
| C. | bases |
| D. | water |
| Answer» B. acids | |
| 5. |
When an acid reacts with metal carbonate, the products are |
| A. | salt |
| B. | water |
| C. | carbon dioxide |
| D. | all of above |
| Answer» E. | |
| 6. |
Which of the following is used to make rectified spirit by fermentation process? |
| A. | cellulose |
| B. | starch |
| C. | glucose |
| D. | fructose |
| Answer» C. glucose | |
| 7. |
Which of the following is not included in fat-soluble vitamins? |
| A. | vitamin A |
| B. | vitamin D |
| C. | vitamin E |
| D. | vitamin B |
| Answer» E. | |
| 8. |
Which of the following are obtained from fruits, vegetables, and cereals? |
| A. | monosaccharides |
| B. | sucrose |
| C. | cellulose |
| D. | starch |
| Answer» B. sucrose | |
| 9. |
Which of the following activates more than 100 different enzymes? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» C. vitamin C | |
| 10. |
Strand of RNA is made of |
| A. | ribose sugar |
| B. | phosphate unit |
| C. | nitrogen base |
| D. | all of above |
| Answer» E. | |
| 11. |
Art that uses acid to crave patterns into a metal, glass and other materials is called |
| A. | painting |
| B. | calligraphy |
| C. | acid art |
| D. | etching |
| Answer» E. | |
| 12. |
What is the effect of the base on red litmus paper? |
| A. | it turns blue |
| B. | it turns pink |
| C. | it remains red |
| D. | it becomes colorless |
| Answer» B. it turns pink | |
| 13. |
Na2SO4 is a/an |
| A. | basic salt |
| B. | common salt |
| C. | acid salt |
| D. | normal salt |
| Answer» E. | |
| 14. |
The negative logarithm of the molar concentration of H+ ions in aqueous solutions is called |
| A. | self-ionization of water |
| B. | hydrogenation |
| C. | ph |
| D. | equilibrium constant |
| Answer» D. equilibrium constant | |
| 15. |
How many replaceable H-atoms are present in Carbonic acid? |
| A. | two |
| B. | three |
| C. | four |
| D. | five |
| Answer» B. three | |
| 16. |
Which of the following is the correct representation for "active mass"? |
| A. | ( ) |
| B. | { } |
| C. | [ ] |
| D. | none of above |
| Answer» D. none of above | |
| 17. |
The rate at which the reaction proceeds is directly proportional to the product of the active masses of |
| A. | products |
| B. | reactants |
| C. | catalysts |
| D. | none of above |
| Answer» C. catalysts | |
| 18. |
What is the representation of a reversible reaction? |
| A. | single arrow |
| B. | double arrows |
| C. | bar |
| D. | none of above |
| Answer» C. bar | |
| 19. |
Unit of equilibrium constant for H2 + I2 2HI is |
| A. | no units |
| B. | mol dm-3 |
| C. | dm3mol-1 |
| D. | none of above |
| Answer» B. mol dm-3 | |
| 20. |
In equilibrium constant expression, the concentration of products is taken in/on the |
| A. | right side |
| B. | left side |
| C. | numerator |
| D. | denominator |
| Answer» D. denominator | |
| 21. |
Ore of silicon is called |
| A. | galena |
| B. | zinc blende |
| C. | Cassiterite |
| D. | silica |
| Answer» E. | |
| 22. |
Ore of iron is called |
| A. | hematite |
| B. | chalcopyrite |
| C. | bauxite |
| D. | halite |
| Answer» B. chalcopyrite | |
| 23. |
Process in which metal ions are reduced to free metals is called |
| A. | roasting |
| B. | smelting |
| C. | Bessemerization |
| D. | concentration |
| Answer» C. Bessemerization | |
| 24. |
The boiling point of diesel is |
| A. | 270 °C to 340 °C |
| B. | 350 °C to 500 °C |
| C. | 500 °C to 600 °C |
| D. | more than 500 °C |
| Answer» B. 350 °C to 500 °C | |
| 25. |
Loss of hydrogen halide is called |
| A. | halogenation |
| B. | dehydration |
| C. | Dehydrohalogenation |
| D. | hydrogenation |
| Answer» D. hydrogenation | |
| 26. |
What is the color of bromine? |
| A. | brown |
| B. | red |
| C. | orange |
| D. | reddish-brown |
| Answer» E. | |
| 27. |
What is the physical state of the first four alkanes? |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | plasma |
| Answer» D. plasma | |
| 28. |
All are wrong about alkenes, but that they are |
| A. | saturated hydrocarbons |
| B. | soluble in water |
| C. | unsaturated hydrocarbons |
| D. | insoluble in organic solvents |
| Answer» D. insoluble in organic solvents | |
| 29. |
When two carbon atoms share two electron pairs then they form |
| A. | single bond |
| B. | double bond |
| C. | triple bond |
| D. | coordinate covalent bond |
| Answer» C. triple bond | |
| 30. |
How much higher can be the temperature inside a greenhouse as compared to the outside? |
| A. | 20 °C higher |
| B. | 10 °C to 15 °C higher |
| C. | 5 °C higher |
| D. | 25 °C higher |
| Answer» C. 5 °C higher | |
| 31. |
The atmosphere is divided into how many layers? |
| A. | two |
| B. | three |
| C. | four |
| D. | five |
| Answer» D. five | |
| 32. |
What is the source of lead compounds? |
| A. | aerosol sprays foams |
| B. | exhaust fumes of motor vehicles |
| C. | incomplete burning of wood |
| D. | none of above |
| Answer» C. incomplete burning of wood | |
| 33. |
Which of the following is produced when electrical discharges pass through oxygen in the air? |
| A. | chlorofluorocarbons |
| B. | methane |
| C. | ozone |
| D. | lead compounds |
| Answer» D. lead compounds | |
| 34. |
How much cooler does the air get for every 1 km increase in altitude in the troposphere? |
| A. | 2 degrees |
| B. | 6.5 degrees |
| C. | 8 degrees |
| D. | 10 degrees |
| Answer» C. 8 degrees | |
| 35. |
Almost 95% of compounds are of carbon because they can form |
| A. | single bonds |
| B. | double bonds |
| C. | triple bonds |
| D. | multiple bonds |
| Answer» E. | |
| 36. |
The self-linking ability of carbon is called |
| A. | catenation |
| B. | sublimation |
| C. | hydrogenation |
| D. | carbonation |
| Answer» B. sublimation | |
| 37. |
In naming alkane the stem tells about the number of |
| A. | hydrogen atoms |
| B. | oxygen atoms |
| C. | carbon atoms |
| D. | bonds |
| Answer» D. bonds | |
| 38. |
The rate of reaction of organic compounds is slow due to |
| A. | ionic bonding |
| B. | amphoteric nature |
| C. | covalent bonding |
| D. | coordinate covalent bonding |
| Answer» D. coordinate covalent bonding | |
| 39. |
As compared to its parent alkane, an alkyl radical contains one |
| A. | less carbon |
| B. | less hydrogen |
| C. | more carbon |
| D. | more hydrogen |
| Answer» C. more carbon | |
| 40. |
Step of sewage water treatment in which sewage is placed in tanks and aerated with large blowers is called |
| A. | primary sewage treatment |
| B. | secondary sewage treatment |
| C. | activated sludge treatment |
| D. | chlorination |
| Answer» D. chlorination | |
| 41. |
The density of water becomes maximum at |
| A. | 10 °C |
| B. | 4 °C |
| C. | 5 °C |
| D. | 12 °C |
| Answer» C. 5 °C | |
| 42. |
The hardness that cannot be removed by boiling is called |
| A. | temporary hardness |
| B. | permanent hardness |
| C. | semi temporary hardness |
| D. | semi permanent hardness |
| Answer» C. semi temporary hardness | |
| 43. |
What is the fourth step of raw water treatment? |
| A. | sedimentation |
| B. | coagulation |
| C. | filtration |
| D. | chlorination |
| Answer» E. | |
| 44. |
The ratio of hydrogen (H) and oxygen (O) in water molecule by volume is |
| A. | 0.084027778 |
| B. | 0.043055556 |
| C. | 0.125694444 |
| D. | 0.167361111 |
| Answer» B. 0.043055556 | |
| 45. |
The atmosphere is divided in to |
| A. | 2 layers |
| B. | 3 layers |
| C. | 1 layer |
| D. | 4 layers |
| Answer» E. | |
| 46. |
At every 1 km increase in altitude, the air gets about |
| A. | 10 °C cooler |
| B. | 6.5 °C hotter |
| C. | 6.5 °C cooler |
| D. | 20 °C cooler |
| Answer» D. 20 °C cooler | |
| 47. |
Percentage of neon in the air is |
| A. | 0.0018 |
| B. | 0.0019 |
| C. | 0.002 |
| D. | 0.0021 |
| Answer» B. 0.0019 | |
| 48. |
Solvents used for cleaning electronic circuit boards are |
| A. | chlorofluorocarbons |
| B. | carbons |
| C. | fluorides |
| D. | grease |
| Answer» B. carbons | |
| 49. |
Unit of the equilibrium constant for CO + 2H2 CH3OH is |
| A. | no units |
| B. | mol dm-3 |
| C. | dm3mol-1 |
| D. | [mol dm-3]-2 |
| Answer» E. | |
| 50. |
In equilibrium constant expression, the concentration of reactants is taken in/on the |
| A. | right side |
| B. | left side |
| C. | numerator |
| D. | denominator |
| Answer» E. | |