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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.
| 751. |
Out of total the amount of water available for human use is |
| A. | 0.003 |
| B. | 0.002 |
| C. | 0.4 |
| D. | 0.5 |
| Answer» C. 0.4 | |
| 752. |
What happens to water on cooling? |
| A. | it expands up to 4 °C |
| B. | it contracts up to 4 °C |
| C. | it expands up to 2 °C |
| D. | it contracts up to 2 °C |
| Answer» C. it expands up to 2 °C | |
| 753. |
Which of the following is used in the form of wood for heat, housing, and furniture? |
| A. | cellulose |
| B. | starch |
| C. | monosaccharides |
| D. | oligosaccharides |
| Answer» B. starch | |
| 754. |
Source of butyric acid is |
| A. | butter |
| B. | palm oil |
| C. | beef fat |
| D. | olive oil |
| Answer» B. palm oil | |
| 755. |
Specific organic compounds which are required by our bodies to prevent specific diseases but cannot be produced by our bodies are called |
| A. | hydrocarbons |
| B. | carbohydrates |
| C. | proteins |
| D. | vitamins |
| Answer» E. | |
| 756. |
The vitamin which helps in chemical transmission of images from the eye to the brain is |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» B. vitamin B | |
| 757. |
In the structure of DNA, how many strands are twisted around each other? |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» C. three | |
| 758. |
Step of sewage water treatment in which effluent from a sewage plant is treated with chlorine is called |
| A. | primary sewage treatment |
| B. | secondary sewage treatment |
| C. | activated sludge treatment |
| D. | chlorination |
| Answer» E. | |
| 759. |
Which of the following is transmitted by fecal contamination of water or food by an encysted organism? |
| A. | cholera |
| B. | dysentery |
| C. | jaundice |
| D. | hepatitis |
| Answer» C. jaundice | |
| 760. |
What is given when electricity is passed through acidified water in a voltammeter? |
| A. | oxygen only |
| B. | hydrogen only |
| C. | nitrogen |
| D. | oxygen and hydrogen |
| Answer» E. | |
| 761. |
Which of the following is an intestinal disease caused by a parasite, entamoeba? |
| A. | cholera |
| B. | dysentery |
| C. | jaundice |
| D. | hepatitis |
| Answer» C. jaundice | |
| 762. |
What percentage of sodium chloride is present in seawater? |
| A. | 0.02 |
| B. | 0.1 |
| C. | 0.034 |
| D. | 0.01 |
| Answer» D. 0.01 | |
| 763. |
What is the pH of the carrot? |
| A. | 5.5 - 7.0 |
| B. | 6.5 - 7.0 |
| C. | 6.0 - 7.5 |
| D. | 6.5 - 7.5 |
| Answer» D. 6.5 - 7.5 | |
| 764. |
An acid is a substance that ionizes in water to produce |
| A. | h+ ions |
| B. | oh- ions |
| C. | oxygen gas |
| D. | hydrogen gas |
| Answer» B. oh- ions | |
| 765. |
What is the effect of acid on red litmus paper? |
| A. | it turns blue |
| B. | it turns pink |
| C. | it remains red |
| D. | it becomes colorless |
| Answer» D. it becomes colorless | |
| 766. |
What is the color of methyl orange in vinegar? |
| A. | red |
| B. | yellow |
| C. | blue |
| D. | pink |
| Answer» B. yellow | |
| 767. |
What is the effect of the base on the skin? |
| A. | no effect |
| B. | causes skin cancer |
| C. | corrosive |
| D. | causes harm to skin tissue |
| Answer» E. | |
| 768. |
Which of the following is monosaccharide? |
| A. | sucrose |
| B. | lactose |
| C. | maltose |
| D. | galactose |
| Answer» E. | |
| 769. |
Lipid which is solid at room temperature is called |
| A. | oil |
| B. | protein |
| C. | sugar |
| D. | fat |
| Answer» E. | |
| 770. |
Which of the following is not used in the fermentation of molasses and starch to produce ethanol? |
| A. | diastase |
| B. | invertase |
| C. | Zymase |
| D. | amylase |
| Answer» E. | |
| 771. |
Which of the following is included in fat-soluble vitamins? |
| A. | vitamin A and C |
| B. | vitamin A, D, E, and K |
| C. | vitamin B and C |
| D. | vitamin A and B |
| Answer» C. vitamin B and C | |
| 772. |
Fats and oils are esters of fatty acids with trihydroxy alcohol called |
| A. | ethanol |
| B. | methanol |
| C. | glycerol |
| D. | propanol |
| Answer» D. propanol | |
| 773. |
Ethylene glycol is used as an |
| A. | ripening agent |
| B. | fertilizer |
| C. | titrating agent |
| D. | anti-freeze |
| Answer» E. | |
| 774. |
When bromine water is added to an alkene, the product is |
| A. | red |
| B. | orange |
| C. | colorless |
| D. | reddish-brown |
| Answer» D. reddish-brown | |
| 775. |
What is the state of dichloromethane at room temperature? |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | plasma |
| Answer» C. gas | |
| 776. |
Which alkanes are widely used as fuel? |
| A. | lighter alkanes |
| B. | heavier alkanes |
| C. | all the alkanes |
| D. | alkenes |
| Answer» B. heavier alkanes | |
| 777. |
When do alkanes readily react with halogens? |
| A. | in darkness |
| B. | in sunlight |
| C. | all the time |
| D. | none of above |
| Answer» C. all the time | |
| 778. |
The second step of metallurgy is |
| A. | crushing, grinding or pulverizing of the ore |
| B. | concentration of the ore |
| C. | extraction of metal |
| D. | refining of metal |
| Answer» C. extraction of metal | |
| 779. |
Ore of tin is called |
| A. | galena |
| B. | zinc blende |
| C. | Cassiterite |
| D. | silica |
| Answer» D. silica | |
| 780. |
The boiling point of petrol is |
| A. | below 20 °C |
| B. | 170-120 °C |
| C. | 35-70 °C |
| D. | 270-340 °C |
| Answer» D. 270-340 °C | |
| 781. |
Ore of zinc is called |
| A. | galena |
| B. | zinc blende |
| C. | cinnabar |
| D. | chromite |
| Answer» C. cinnabar | |
| 782. |
The process in which metal is separated from its ore and prepared for use is called |
| A. | metallurgy |
| B. | mining |
| C. | crushing |
| D. | Solvay process |
| Answer» B. mining | |
| 783. |
Which of the following is not true about alkynes? |
| A. | they are unsaturated hydrocarbons |
| B. | they are saturated hydrocarbons |
| C. | they are non-polar |
| D. | they dissolve readily in organic solvents |
| Answer» C. they are non-polar | |
| 784. |
Vicinal dihalide eliminates two molecules of hydrogen halides from adjacent carbon atoms on treatment with |
| A. | Zn dust |
| B. | calcium hydroxide |
| C. | alcoholic potassium hydroxide |
| D. | calcium chloride |
| Answer» D. calcium chloride | |
| 785. |
The reaction of any substance with air is called |
| A. | carbation |
| B. | halogenation |
| C. | sublimation |
| D. | combustion |
| Answer» E. | |
| 786. |
Loss of hydrogen halide from alkyl halide gives |
| A. | alkenes |
| B. | alkanes |
| C. | alkynes |
| D. | halogens |
| Answer» B. alkanes | |
| 787. |
Trichloromethane is also called |
| A. | chlorophyll |
| B. | chloroplast |
| C. | chloromethane |
| D. | chloroform |
| Answer» E. | |
| 788. |
What is the term used for the reaction of an alkane and a halogen? |
| A. | substitution reaction |
| B. | elimination reaction |
| C. | Dehydrohalogenation |
| D. | hydrogenation |
| Answer» B. elimination reaction | |
| 789. |
After the first three members, the next eight members of alkynes are |
| A. | solids |
| B. | liquids |
| C. | gases |
| D. | plasma |
| Answer» C. gases | |
| 790. |
Which of the following processes involves the addition of hydrogen molecule across carbon-carbon multiple-bond? |
| A. | dehydration |
| B. | Dehydrohalogenation |
| C. | dehalogenation |
| D. | hydrogenation |
| Answer» E. | |
| 791. |
What is the state of tetrachloromethane at room temperature? |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | plasma |
| Answer» C. gas | |
| 792. |
How much ethene is required for the ripening of 1 kg of tomatoes? |
| A. | 1 mg |
| B. | 100 mg |
| C. | 10 mg |
| D. | 0.1 mg |
| Answer» E. | |
| 793. |
Fructose is an example of |
| A. | monosaccharides |
| B. | oligosaccharides |
| C. | polysaccharides |
| D. | vitamins |
| Answer» B. oligosaccharides | |
| 794. |
Which of the following should be fed to hens to lower the amount of cholesterol in eggs? |
| A. | flax seeds |
| B. | apple seeds |
| C. | banana seeds |
| D. | apricot seeds |
| Answer» B. apple seeds | |
| 795. |
When hydrogen is added to vegetable oils, they become |
| A. | saturated and harder |
| B. | unsaturated and softer |
| C. | saturated and softer |
| D. | unsaturated and harder |
| Answer» B. unsaturated and softer | |
| 796. |
Starch and cellulose are |
| A. | crystalline solids |
| B. | amorphous solids |
| C. | liquids |
| D. | gasses |
| Answer» C. liquids | |
| 797. |
The condensed structural formula of Stearic acid is |
| A. | CH3-CH2-CH2-COOH |
| B. | CH3-(CH2)4-COOH |
| C. | CH3-(CH2)14-COOH |
| D. | CH3-(CH2)16-COOH |
| Answer» E. | |
| 798. |
Which of the following is used as a catalyst in hydrogenation reaction? |
| A. | Ni |
| B. | Pd |
| C. | Pt |
| D. | all of above |
| Answer» E. | |
| 799. |
Which of the following protects our heart and kidneys from injury? |
| A. | skin |
| B. | muscles |
| C. | lubricants |
| D. | fat |
| Answer» E. | |
| 800. |
The physical state of fat at room temperature is |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | plasma |
| Answer» B. liquid | |