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.
| 601. |
The molecular formula for Heptane is |
| A. | C4H10 |
| B. | C8H18 |
| C. | C5H12 |
| D. | C7H16 |
| Answer» E. | |
| 602. |
Commercial sources of alkanes include |
| A. | coal |
| B. | natural gas |
| C. | petroleum |
| D. | all of above |
| Answer» E. | |
| 603. |
The general formula for ethers is |
| A. | R-OH |
| B. | R-O-R |
| C. | R-COOH |
| D. | R-NH2 |
| Answer» C. R-COOH | |
| 604. |
Saturated hydrocarbons (alkanes) have |
| A. | carbon-carbon single bond |
| B. | carbon-carbon double bond |
| C. | carbon-carbon triple bond |
| D. | carbon-carbon quad bond |
| Answer» B. carbon-carbon double bond | |
| 605. |
What is the general formula of alkanes? |
| A. | CnH2n+2 |
| B. | CnH2n |
| C. | CnH2n-2 |
| D. | CnHn |
| Answer» B. CnH2n | |
| 606. |
The suffix in alkane represents |
| A. | hydrogen atoms |
| B. | carbon atoms |
| C. | bonds present |
| D. | class of compound |
| Answer» E. | |
| 607. |
An alkane with molecular formula C8H18 is called |
| A. | butane |
| B. | octane |
| C. | Nonane |
| D. | Decane |
| Answer» C. Nonane | |
| 608. |
Height of troposphere is |
| A. | 10 Km |
| B. | 12 Km |
| C. | 50 Km |
| D. | 80 Km |
| Answer» C. 50 Km | |
| 609. |
Which of the following is true about sulfur dioxide? |
| A. | it is colorless |
| B. | it is odourless |
| C. | it is not an air pollutant |
| D. | it does not cause breathing difficulties |
| Answer» B. it is odourless | |
| 610. |
Which of the following is not true about carbon monoxide? |
| A. | it is poisonous |
| B. | it is insoluble in water |
| C. | it is an air pollutant |
| D. | it can cause death |
| Answer» C. it is an air pollutant | |
| 611. |
What is the color of nitrogen dioxide? |
| A. | colorless |
| B. | pink |
| C. | brown |
| D. | reddish brown |
| Answer» E. | |
| 612. |
The thermosphere is divided into how many layers? |
| A. | two |
| B. | three |
| C. | four |
| D. | five |
| Answer» B. three | |
| 613. |
Which of the following is responsible for the rise in temperature in the stratosphere? |
| A. | position of stratosphere |
| B. | height of stratosphere |
| C. | ozone |
| D. | sunlight |
| Answer» D. sunlight | |
| 614. |
Which of the following has the lowest percentage in the air? |
| A. | krypton |
| B. | argon |
| C. | hydrogen |
| D. | helium |
| Answer» D. helium | |
| 615. |
What is the term used for the envelope of gases and water vapor surrounding the planet earth? |
| A. | air |
| B. | atmosphere |
| C. | environment |
| D. | biome |
| Answer» C. environment | |
| 616. |
Which of the following is true about nitrogen dioxide? |
| A. | it is colorless |
| B. | it is odourless |
| C. | it is soluble in water |
| D. | it is soluble in oxygen |
| Answer» D. it is soluble in oxygen | |
| 617. |
The lower layer of the thermosphere is |
| A. | ionosphere |
| B. | exosphere |
| C. | mesosphere |
| D. | stratosphere |
| Answer» B. exosphere | |
| 618. |
Anything that destroys some part of the environment is called |
| A. | dirt |
| B. | virus |
| C. | pollutant |
| D. | bacteria |
| Answer» D. bacteria | |
| 619. |
Which of the following causes headache and dizziness and can even cause death if inhaled for a long time? |
| A. | sulphur dioxide |
| B. | carbon dioxide |
| C. | nitrogen dioxide |
| D. | carbon monoxide |
| Answer» E. | |
| 620. |
Which of the following comes mainly due to the combustion of fuel used in motor vehicles? |
| A. | chlorofluorocarbons (CFCs) |
| B. | methane |
| C. | carbon monoxide |
| D. | lead compounds |
| Answer» E. | |
| 621. |
Most of the dust particles and water vapors are present in |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» B. stratosphere | |
| 622. |
Majority of the UV rays are screened out by |
| A. | oxygen |
| B. | nitrogen |
| C. | ozone |
| D. | carbon |
| Answer» D. carbon | |
| 623. |
Antibiotics are |
| A. | carbohydrate in nature |
| B. | protein in nature |
| C. | fats |
| D. | vitamins in nature |
| Answer» C. fats | |
| 624. |
Each nucleotide consists of how many components? |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» D. four | |
| 625. |
What are the antibodies that help us to fight against diseases? |
| A. | small protein molecules |
| B. | small carbohydrate molecules |
| C. | large protein molecules |
| D. | large lipid molecules |
| Answer» D. large lipid molecules | |
| 626. |
Which of the following is used in the process of taking the human gene for insulin production? |
| A. | e. coli |
| B. | virus |
| C. | amoeba |
| D. | fungi |
| Answer» B. virus | |
| 627. |
Which of the following is true about oligosaccharides? |
| A. | they are white crystalline solids |
| B. | they are insoluble in water |
| C. | they cannot be hydrolyzed |
| D. | they have sour taste |
| Answer» B. they are insoluble in water | |
| 628. |
How many types of vitamins are there? |
| A. | two |
| B. | three |
| C. | four |
| D. | five |
| Answer» B. three | |
| 629. |
How much energy is provided by 1g of glucose? |
| A. | 15.6 KJ |
| B. | 16.8 KJ |
| C. | 20 KJ |
| D. | 1.2 KJ |
| Answer» B. 16.8 KJ | |
| 630. |
Cellulose is obtained from? |
| A. | animals |
| B. | microorganisms |
| C. | plants |
| D. | bacteria |
| Answer» D. bacteria | |
| 631. |
Deficiency of vitamin D causes |
| A. | night blindness |
| B. | anemia and bleeding gums |
| C. | scurvy |
| D. | rickets and Osteomalacia |
| Answer» E. | |
| 632. |
Which of the following is a code that stores information which is used to produce proteins? |
| A. | structure of the base pairs |
| B. | order of the base pairs |
| C. | number of the base pairs |
| D. | number of hydrogen |
| Answer» C. number of the base pairs | |
| 633. |
Which of the following used the word 'vitamin' for the missing factors that were needed to sustain healthy growth? |
| A. | C. Eijkman |
| B. | F.G Hopkins |
| C. | Casmir Funk |
| D. | Jabar Bin Hayan |
| Answer» D. Jabar Bin Hayan | |
| 634. |
Nucleic acids were first obtained from |
| A. | blood of infected wounds |
| B. | pus of infected wounds |
| C. | skin |
| D. | muscles |
| Answer» C. skin | |
| 635. |
Vitamin E is necessary for |
| A. | eyes and skin |
| B. | energy production in cells |
| C. | antioxidant |
| D. | blood clotting |
| Answer» D. blood clotting | |
| 636. |
In what form is glucose stored in animal muscles and liver cells? |
| A. | glucagon |
| B. | vitamins |
| C. | glycogen |
| D. | starch |
| Answer» D. starch | |
| 637. |
The key to the ability of DNA to pass and store genetic information is its |
| A. | hydrogen bonding |
| B. | double stranded structure |
| C. | deoxyribose sugar |
| D. | nitrogen base |
| Answer» C. deoxyribose sugar | |
| 638. |
Which of the following is not true about oligosaccharides? |
| A. | they are white crystalline solids |
| B. | they are soluble in water |
| C. | they cannot be hydrolyzed |
| D. | they have sweet taste |
| Answer» D. they have sweet taste | |
| 639. |
What is the term used for carbohydrates which form 100 to 1000 units of simple sugars upon hydrolysis? |
| A. | monosaccharides |
| B. | oligosaccharides |
| C. | polysaccharides |
| D. | lipids |
| Answer» D. lipids | |
| 640. |
Which of the following is included in water-soluble vitamins? |
| A. | vitamin A and D |
| B. | vitamin A and K |
| C. | vitamin B and C |
| D. | vitamin A and B |
| Answer» D. vitamin A and B | |
| 641. |
Which of the following discovered that polished rice lacked something that caused the disease beriberi? |
| A. | C. Eijkman |
| B. | F.G Hopkins |
| C. | Casmir Funk |
| D. | J.Watson |
| Answer» B. F.G Hopkins | |
| 642. |
Which of the following is a process used to convert vegetable oils into vegetable ghee? |
| A. | dehydration |
| B. | hydrogenation |
| C. | Dehydrohalogenation |
| D. | halogenation |
| Answer» C. Dehydrohalogenation | |
| 643. |
Ozone formation and destruction are powered by |
| A. | oxygen gas |
| B. | atomic oxygen |
| C. | ultraviolet radiation |
| D. | chlorine gas |
| Answer» D. chlorine gas | |
| 644. |
What is meant by the term 'tropo'? |
| A. | top |
| B. | first |
| C. | high |
| D. | turning |
| Answer» E. | |
| 645. |
Which of the following is the second layer of atmosphere as one moves upwards from the Earth's surface? |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» C. mesosphere | |
| 646. |
Height of stratosphere is |
| A. | 0-12 Km |
| B. | 12-50 Km |
| C. | 50-80 Km |
| D. | above 80 Km |
| Answer» C. 50-80 Km | |
| 647. |
Formation of most of the clouds is in |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» B. stratosphere | |
| 648. |
Which of the following is not included in water-soluble vitamins? |
| A. | vitamin B |
| B. | vitamin C |
| C. | vitamin A |
| D. | vitamin D |
| Answer» D. vitamin D | |
| 649. |
Rickets and Osteomalacia are caused by the deficiency of |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» E. | |
| 650. |
Which of the following is a dextrose sugar? |
| A. | fructose |
| B. | Manose |
| C. | lactose |
| D. | maltose |
| Answer» C. lactose | |