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.
| 701. |
Amount of ozone contained by stratosphere is |
| A. | 10ppm |
| B. | 20ppm |
| C. | 30ppm |
| D. | 40ppm |
| Answer» B. 20ppm | |
| 702. |
What happens to the rates of ozone formation and destruction in the absence of outside intervention? |
| A. | rate of ozone formation is faster |
| B. | rate of ozone destruction is faster |
| C. | they are equal |
| D. | none of above |
| Answer» D. none of above | |
| 703. |
What is meant by the term 'thermo'? |
| A. | outer |
| B. | top |
| C. | turning |
| D. | heat |
| Answer» E. | |
| 704. |
Which of the following protects Earth's surface from being hit by most meteoroids? |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» D. thermosphere | |
| 705. |
Which of the following is not an air pollutant? |
| A. | carbon dioxide |
| B. | carbon monoxide |
| C. | sulphur dioxide |
| D. | oxides of nitrogen |
| Answer» B. carbon monoxide | |
| 706. |
Maximum temperature of the troposphere is |
| A. | 17 °C |
| B. | −55 °C |
| C. | −5 °C |
| D. | 1800 °C |
| Answer» B. −55 °C | |
| 707. |
What is the extension of the exosphere above the surface of Earth? |
| A. | 80 km to 400 km |
| B. | 0 km to 12 km |
| C. | 400 km to thousands of kilometer |
| D. | none of above |
| Answer» D. none of above | |
| 708. |
Which of the following is obtained by heating bones and tendons in the water? |
| A. | gelatin |
| B. | enzyme |
| C. | amylase |
| D. | lactase |
| Answer» B. enzyme | |
| 709. |
Which of the following is the key to the ability of DNA to store genetic information and to pass it on from generation to generation? |
| A. | double stranded structure of DNA |
| B. | deoxyribose sugar |
| C. | phosphate unit |
| D. | nitrogen base |
| Answer» B. deoxyribose sugar | |
| 710. |
Vitamin B is soluble in |
| A. | fat |
| B. | water |
| C. | alcohol |
| D. | ethers |
| Answer» C. alcohol | |
| 711. |
Deficiency of vitamin A causes |
| A. | night blindness |
| B. | anemia and bleeding gums |
| C. | scurvy |
| D. | rickets and Osteomalacia |
| Answer» B. anemia and bleeding gums | |
| 712. |
Which of the following causes dry skin when taken in excess amount? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» B. vitamin B | |
| 713. |
Water that easily gives lather with soap is called |
| A. | hard water |
| B. | soft water |
| C. | dirty water |
| D. | clean water |
| Answer» B. soft water | |
| 714. |
Temporary hardness can be removed by adding |
| A. | lime |
| B. | carbon |
| C. | oxygen |
| D. | slaked lime |
| Answer» E. | |
| 715. |
Hepatitis is caused by |
| A. | virus |
| B. | bacteria |
| C. | amoeba |
| D. | parasite |
| Answer» B. bacteria | |
| 716. |
During thunderstorms, water dissolves |
| A. | dust particles |
| B. | HCl |
| C. | nitric acid |
| D. | clouds |
| Answer» D. clouds | |
| 717. |
Water which forms scum with soap is called |
| A. | hard water |
| B. | soft water |
| C. | distilled water |
| D. | non distilled water |
| Answer» B. soft water | |
| 718. |
Glucose (C6H12O6) and fructose (C6H12O6) are |
| A. | simple sugars |
| B. | simple salts |
| C. | simple acids |
| D. | complex sugars |
| Answer» B. simple salts | |
| 719. |
Physical state of oil at room temperature is |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | plasma |
| Answer» C. gas | |
| 720. |
Two fatty acids that are components of oil are |
| A. | stearic acid and oleic acid |
| B. | butyric acid and caproic acid |
| C. | palmitic acid and oleic acid |
| D. | stearic and butyric acid |
| Answer» D. stearic and butyric acid | |
| 721. |
Source of oleic acid is |
| A. | butter |
| B. | palm oil |
| C. | beef fat |
| D. | olive oil |
| Answer» E. | |
| 722. |
A DNA (Deoxyribonucleic Acid) can store and transmit the |
| A. | genetic information |
| B. | cell information |
| C. | blood |
| D. | nerves |
| Answer» B. cell information | |
| 723. |
Percentage of argon in the air is |
| A. | 0.78 |
| B. | 0.21 |
| C. | 0.0093 |
| D. | 0.0004 |
| Answer» D. 0.0004 | |
| 724. |
The layer which protects the earth from being hit by meteoroids is |
| A. | troposphere |
| B. | mesosphere |
| C. | thermosphere |
| D. | stratosphere |
| Answer» C. thermosphere | |
| 725. |
The temperature variation in the stratosphere is about |
| A. | −5 °C to 50 °C |
| B. | −5 °C to 50 °C |
| C. | 10 °C to 20 °C |
| D. | −55 °C to −5 °C |
| Answer» E. | |
| 726. |
The upset caused in the natural balance of concentration of greenhouse gases is called |
| A. | pollution |
| B. | global warming |
| C. | atmospheric poisoning |
| D. | earth heating |
| Answer» C. atmospheric poisoning | |
| 727. |
The thermosphere is situated above |
| A. | 12 Km |
| B. | 50 Km |
| C. | 80 Km |
| D. | 10 Km |
| Answer» D. 10 Km | |
| 728. |
The reaction in which one chlorine atom becomes attached with one carbon and the other one with other carbon atom is called |
| A. | elimination reaction |
| B. | substitution reaction |
| C. | halogenation |
| D. | addition reaction |
| Answer» E. | |
| 729. |
What is given by the incomplete combustion of methane? |
| A. | carbon dioxide and water |
| B. | carbon dioxide, water and heat |
| C. | carbon monoxide, carbon and water |
| D. | hydrogen and carbon dioxide |
| Answer» D. hydrogen and carbon dioxide | |
| 730. |
What is the physical state of higher alkanes? |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | plasma |
| Answer» B. liquid | |
| 731. |
What is produced by the complete combustion of an alkane? |
| A. | carbon dioxide and water |
| B. | carbon dioxide, water and heat |
| C. | carbon monoxide, carbon and water |
| D. | hydrogen and carbon dioxide |
| Answer» C. carbon monoxide, carbon and water | |
| 732. |
Glyoxal formed by loss of two water molecules by tetrahydroxy ethane oxidizes to |
| A. | ethylene glycol |
| B. | acetylene |
| C. | oxalic acid |
| D. | benzoic acid |
| Answer» D. benzoic acid | |
| 733. |
The rate at which a substance reacts is directly proportional to its |
| A. | product |
| B. | active mass |
| C. | reactant |
| D. | catalysts |
| Answer» C. reactant | |
| 734. |
What is established when the rate of evaporation equals the rate of condensation? |
| A. | equality |
| B. | equilibrium |
| C. | reversible reaction |
| D. | irreversible reaction |
| Answer» C. reversible reaction | |
| 735. |
In Haber's process, the amount of ammonia yields is |
| A. | 0.4 |
| B. | 0.9 |
| C. | 0.33 |
| D. | 0.22 |
| Answer» D. 0.22 | |
| 736. |
What percentage of ammonia is produced at equilibrium by the Haber process? |
| A. | 20 percent |
| B. | 33 percent |
| C. | 100 percent |
| D. | 99 percent |
| Answer» C. 100 percent | |
| 737. |
What is denoted by the subscript 'c' in Kc? |
| A. | chemical equilibrium |
| B. | chemical reaction |
| C. | molar concentration at equilibrium |
| D. | rate of chemical reaction |
| Answer» D. rate of chemical reaction | |
| 738. |
Which of the following is contained in sugarcane, sugar beet and fruits? |
| A. | monosaccharides |
| B. | sucrose |
| C. | cellulose |
| D. | starch |
| Answer» C. cellulose | |
| 739. |
Which of the following are high molecular weight polymers? |
| A. | carbohydrates |
| B. | hydrocarbons |
| C. | proteins |
| D. | lipids |
| Answer» D. lipids | |
| 740. |
Which of the following protects delicate organs from shocks? |
| A. | skin |
| B. | muscles |
| C. | lubricants |
| D. | fat |
| Answer» E. | |
| 741. |
Hemolysis of red blood cells and sterility are caused by the deficiency of |
| A. | vitamin E |
| B. | vitamin K |
| C. | vitamin C |
| D. | vitamin D |
| Answer» B. vitamin K | |
| 742. |
Night blindness is caused by the deficiency of |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» B. vitamin B | |
| 743. |
If the OH group is attached to the benzene ring, the compound form is |
| A. | alcohol |
| B. | phenol |
| C. | alkene |
| D. | alkyne |
| Answer» C. alkene | |
| 744. |
How many isomers are contained by pentane? |
| A. | two |
| B. | three |
| C. | four |
| D. | five |
| Answer» C. four | |
| 745. |
Which of the following is the simplest alkane? |
| A. | methane |
| B. | ethane |
| C. | propane |
| D. | butane |
| Answer» B. ethane | |
| 746. |
What is the term used for the hydrocarbons whose carbon-carbon bonds are all single bonds? |
| A. | unsaturated hydrocarbons |
| B. | alkenes |
| C. | alkynes |
| D. | saturated hydrocarbons |
| Answer» E. | |
| 747. |
What is the term used for an atom or group of atoms that provide a family of organic compounds its characteristic properties? |
| A. | alkyl group |
| B. | functional group |
| C. | hydrocarbons |
| D. | structural group |
| Answer» C. hydrocarbons | |
| 748. |
The second step of sewage water treatment is called |
| A. | primary sewage treatment |
| B. | secondary sewage treatment |
| C. | activated sludge treatment |
| D. | chlorination |
| Answer» C. activated sludge treatment | |
| 749. |
Step of sewage water treatment in which some of the solids are removed as sludge is called |
| A. | primary sewage treatment |
| B. | secondary sewage treatment |
| C. | activated sludge treatment |
| D. | chlorination |
| Answer» B. secondary sewage treatment | |
| 750. |
What is the percentage of atmospheric water? |
| A. | 0 |
| B. | 0.002 |
| C. | 0.006 |
| D. | 0.021 |
| Answer» B. 0.002 | |