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.
| 51. |
The ratio of the product of the concentration of products to the product of the concentration of reactants is called |
| A. | equilibrium constant |
| B. | equilibrium ratio |
| C. | reverse reaction |
| D. | forward reaction |
| Answer» B. equilibrium ratio | |
| 52. |
Substances which increase the rate of a chemical reaction are called |
| A. | proteins |
| B. | single cell protein |
| C. | enzymes |
| D. | catalysts |
| Answer» E. | |
| 53. |
Kf and Kr are |
| A. | equilibrium constants |
| B. | reaction constants |
| C. | chemical constants |
| D. | rate constants |
| Answer» E. | |
| 54. |
The occurrence of weather is in |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» B. stratosphere | |
| 55. |
Which two main gases are produced when you burn a piece of wood? |
| A. | oxygen and nitrogen |
| B. | carbon dioxide and oxygen |
| C. | carbon dioxide and carbon monoxide |
| D. | carbon dioxide and nitrogen |
| Answer» D. carbon dioxide and nitrogen | |
| 56. |
Which of the following is produced when dead plant material decays in the absence of air? |
| A. | chlorofluorocarbons (CFCs) |
| B. | methane |
| C. | carbon monoxide |
| D. | lead compounds |
| Answer» C. carbon monoxide | |
| 57. |
Group of chemically unreactive compounds that are commonly used as solvents are called |
| A. | chlorofluorocarbons (CFCs) |
| B. | functional groups |
| C. | alkyl groups |
| D. | lead compounds |
| Answer» B. functional groups | |
| 58. |
Which of the following is further divided into two layers? |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» E. | |
| 59. |
What is the pH of the potato? |
| A. | 5.5 - 7.0 |
| B. | 6.5 - 7.0 |
| C. | 5.5 - 6.5 |
| D. | 6.5 - 7.0 |
| Answer» D. 6.5 - 7.0 | |
| 60. |
What is the second part of the name of salt? |
| A. | negative part of the acid |
| B. | base |
| C. | metal ion |
| D. | non metallic ion |
| Answer» B. base | |
| 61. |
What is the pH of milk of magnesia? |
| A. | 10 |
| B. | 11 |
| C. | 12 |
| D. | 13 |
| Answer» B. 11 | |
| 62. |
What is the pH of acid from batteries? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 63. |
The reaction between H+ ions of acid and OH- ions of a base is called |
| A. | titration |
| B. | neutralization |
| C. | synthesis reaction |
| D. | decomposition reaction |
| Answer» C. synthesis reaction | |
| 64. |
Which of the following contains a larger proportion of saturated fatty acid units? |
| A. | fats |
| B. | oils |
| C. | lipids |
| D. | proteins |
| Answer» B. oils | |
| 65. |
Carbohydrates which form 2 to 9 molecules of simple sugars upon hydrolysis are called |
| A. | monosaccharides |
| B. | oligosaccharides |
| C. | polysaccharides |
| D. | starch |
| Answer» C. polysaccharides | |
| 66. |
Nucleotides consist of |
| A. | nitrogenous base |
| B. | pentose sugar |
| C. | phosphate group |
| D. | all of above |
| Answer» E. | |
| 67. |
Which of the following is the most abundant class of organic compounds? |
| A. | carbohydrates |
| B. | proteins |
| C. | vitamins |
| D. | lipids |
| Answer» B. proteins | |
| 68. |
What is formed when lactose undergoes hydrolysis? |
| A. | glucose |
| B. | glucose and fructose |
| C. | glucose and galactose |
| D. | glucose and glucose |
| Answer» D. glucose and glucose | |
| 69. |
The general formula for alcohols is |
| A. | R-OH |
| B. | R-O-R |
| C. | R-COOH |
| D. | R-NH2 |
| Answer» B. R-O-R | |
| 70. |
What is the general formula of alkynes? |
| A. | cnh2n+2 |
| B. | cnh2n |
| C. | cnh2n-2 |
| D. | CnHn |
| Answer» D. CnHn | |
| 71. |
The formula that shows the arrangement of atoms in a compound is called |
| A. | molecular formula |
| B. | structural formula |
| C. | compound formula |
| D. | empirical formula |
| Answer» C. compound formula | |
| 72. |
Methanal is an example of |
| A. | aldehydes |
| B. | ketones |
| C. | carboxylic acids |
| D. | ethers |
| Answer» B. ketones | |
| 73. |
Which of the following has at least one hydrogen atom or two hydrogen atoms attached to the carbonyl carbon atom? |
| A. | aldehydes |
| B. | ketones |
| C. | carboxylic acids |
| D. | ethers |
| Answer» B. ketones | |
| 74. |
Which of the following is the first layer of atmosphere as one moves upwards from the Earth's surface? |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» B. stratosphere | |
| 75. |
A waste treatment process in which solid waste is burned at high temperature is called |
| A. | combustion |
| B. | incineration |
| C. | oxidation |
| D. | reduction |
| Answer» C. oxidation | |
| 76. |
Percentage of methane in the air is |
| A. | 0 |
| B. | 0 |
| C. | 0 |
| D. | 0 |
| Answer» D. 0 | |
| 77. |
Height of mesosphere is |
| A. | 0-12 Km |
| B. | 12-50 Km |
| C. | 50-80 Km |
| D. | above 80 Km |
| Answer» D. above 80 Km | |
| 78. |
What is the term used for the area in which the amount of ozone has been reduced? |
| A. | black hole |
| B. | worm hole |
| C. | ozone hole |
| D. | red hole |
| Answer» D. red hole | |
| 79. |
Each nucleotide consists of |
| A. | nitrogenous base |
| B. | five carbon sugar |
| C. | phosphate group |
| D. | all of above |
| Answer» E. | |
| 80. |
Which of the following is an example of polysaccharides? |
| A. | glucose |
| B. | cellulose |
| C. | fructose |
| D. | maltose |
| Answer» C. fructose | |
| 81. |
Monosaccharides can contain |
| A. | 4 to 5 carbon atoms |
| B. | 1 to 5 carbon atoms |
| C. | 7 to 9 carbon atoms |
| D. | 3 to 6 carbon atoms |
| Answer» E. | |
| 82. |
Any component of plant or animal tissue that is insoluble in water but soluble in solvents of low polarity is called |
| A. | protein |
| B. | lipid |
| C. | carbohydrate |
| D. | vitamin |
| Answer» C. carbohydrate | |
| 83. |
Fats and oils are called |
| A. | simple lipids |
| B. | saturated fatty acids |
| C. | unsaturated fatty acids |
| D. | complex lipids |
| Answer» B. saturated fatty acids | |
| 84. |
Which of the following is used in the fermentation of molasses and starch to produce ethanol? |
| A. | diastase |
| B. | lactase |
| C. | protease |
| D. | amylase |
| Answer» B. lactase | |
| 85. |
Which of the following are called the simplest carbohydrates? |
| A. | monosaccharides |
| B. | oligosaccharides |
| C. | polysaccharides |
| D. | starch |
| Answer» B. oligosaccharides | |
| 86. |
Catalytic hydrogenation of vegetable oils convert them in to |
| A. | vegetable ghee |
| B. | vitamins |
| C. | proteins |
| D. | carbohydrates |
| Answer» B. vitamins | |
| 87. |
Cholesterol comes from |
| A. | animal products |
| B. | vegetable products |
| C. | fruit products |
| D. | insect products |
| Answer» B. vegetable products | |
| 88. |
Lipids include |
| A. | sucrose |
| B. | maltose |
| C. | fats and oils |
| D. | thymine |
| Answer» D. thymine | |
| 89. |
Which of the following helps in the formation of hemoglobin? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» C. vitamin C | |
| 90. |
RNA (Ribonucleic Acid) is made up of |
| A. | ribose sugar |
| B. | phosphate unit |
| C. | nitrogen base |
| D. | all of above |
| Answer» E. | |
| 91. |
Maltose is found in |
| A. | fruits |
| B. | vegetables |
| C. | cereals |
| D. | beans |
| Answer» D. beans | |
| 92. |
Which of the following is used in detergents to remove food stains on clothes? |
| A. | protease |
| B. | amylase |
| C. | diastase |
| D. | lactase |
| Answer» B. amylase | |
| 93. |
The molecular formula of glucose is |
| A. | C12H22O11 |
| B. | C18H32O16 |
| C. | C6H12O6 |
| D. | C4H10 |
| Answer» D. C4H10 | |
| 94. |
The molecular formula of ethane is |
| A. | CH4 |
| B. | C2H6 |
| C. | C3H8 |
| D. | C4H10 |
| Answer» C. C3H8 | |
| 95. |
Chloroform is also called |
| A. | chloromethane |
| B. | dichloromethane |
| C. | Trichloromethane |
| D. | tetra chloromethane |
| Answer» D. tetra chloromethane | |
| 96. |
Oxy-acetylene torches can produce temperature as high as |
| A. | 30 degrees |
| B. | 300 degrees |
| C. | 3000 degrees |
| D. | 30000 degrees |
| Answer» D. 30000 degrees | |
| 97. |
Acetylene is also called |
| A. | Ethyne |
| B. | ethene |
| C. | ethane |
| D. | methane |
| Answer» B. ethene | |
| 98. |
Which of the following is given off during ripening fruits and vegetables? |
| A. | ethane |
| B. | ethene |
| C. | Ethyne |
| D. | methane |
| Answer» C. Ethyne | |
| 99. |
Product of [H+] and [OH-] is always |
| A. | 1 x 10-10 |
| B. | 1 x 10-4 |
| C. | 1 x 10-14 |
| D. | 1 x 10-7 |
| Answer» D. 1 x 10-7 | |
| 100. |
What is the pH of black coffee? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |