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.
| 101. |
What is the pH of the drain cleaner? |
| A. | 1 |
| B. | 2 |
| C. | 12 |
| D. | 14 |
| Answer» E. | |
| 102. |
What is the pH of bleach? |
| A. | 3 |
| B. | 4 |
| C. | 13 |
| D. | 14 |
| Answer» D. 14 | |
| 103. |
PH method was proposed by |
| A. | Arrhenius |
| B. | Soren Sorenson |
| C. | Lewis |
| D. | Bohr |
| Answer» C. Lewis | |
| 104. |
Which of the following helps to regulate nerve impulse transmissions? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» C. vitamin C | |
| 105. |
Which of the following regulates blood calcium? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» E. | |
| 106. |
Delayed blood clotting is caused by the deficiency of |
| A. | vitamin E |
| B. | vitamin K |
| C. | vitamin C |
| D. | vitamin D |
| Answer» C. vitamin C | |
| 107. |
Amino acids that cannot be synthesized by our bodies are called |
| A. | essential amino acids |
| B. | non-essential amino acids |
| C. | peptide bonds |
| D. | proteins |
| Answer» B. non-essential amino acids | |
| 108. |
Which of the following contains a larger proportion of unsaturated fatty acid units? |
| A. | fats |
| B. | oils |
| C. | proteins |
| D. | carbohydrates |
| Answer» C. proteins | |
| 109. |
What do we use to reduce unpleasant fishy odor? |
| A. | nitric acid |
| B. | citric acid |
| C. | hydrochloric acid |
| D. | sulphuric acid |
| Answer» C. hydrochloric acid | |
| 110. |
Kw = Kc [H2O] is termed as |
| A. | ionization constant for water |
| B. | equilibrium constant for water |
| C. | ph for water |
| D. | formula for water |
| Answer» B. equilibrium constant for water | |
| 111. |
Intensely colored organic compounds are called |
| A. | ph |
| B. | red litmus paper |
| C. | blue litmus paper |
| D. | indicators |
| Answer» E. | |
| 112. |
KHCO3 is a/an |
| A. | basic salt |
| B. | common salt |
| C. | acid salt |
| D. | normal salt |
| Answer» D. normal salt | |
| 113. |
What is the pH of onion? |
| A. | 5.5 - 7.0 |
| B. | 6.5 - 7.0 |
| C. | 6.0 - 7.5 |
| D. | 6.5 - 7.5 |
| Answer» E. | |
| 114. |
Color is changed from red to yellow by methyl red at |
| A. | ph3 |
| B. | ph4 |
| C. | ph5 |
| D. | ph6 |
| Answer» E. | |
| 115. |
What is the pH of a broad bean? |
| A. | 5.5 - 7.0 |
| B. | 6.5 - 7.0 |
| C. | 6.0 - 7.5 |
| D. | 6.5 - 7.5 |
| Answer» C. 6.0 - 7.5 | |
| 116. |
What is the pH of the tomato? |
| A. | 5.5 - 7.0 |
| B. | 6.5 - 7.0 |
| C. | 5.5 - 6.5 |
| D. | 6.5 - 7.0 |
| Answer» B. 6.5 - 7.0 | |
| 117. |
Which of the following is used in the manufacture of fertilizers and explosives? |
| A. | hydrochloric acid |
| B. | nitric acid |
| C. | sulphuric acid |
| D. | phosphoric acid |
| Answer» C. sulphuric acid | |
| 118. |
If [H+] increases, [OH-] |
| A. | also increases |
| B. | remains same |
| C. | decreases |
| D. | none of above |
| Answer» D. none of above | |
| 119. |
What is the pH of orange juice? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» E. | |
| 120. |
K2CO3 is a/an |
| A. | basic salt |
| B. | common salt |
| C. | acid salt |
| D. | normal salt |
| Answer» E. | |
| 121. |
What is the term used for a salt which is formed by the complete neutralization of an acid? |
| A. | basic salt |
| B. | common salt |
| C. | acid salt |
| D. | normal salt |
| Answer» E. | |
| 122. |
Which of the following is used as an acidulant for food? |
| A. | hydrochloric acid |
| B. | nitric acid |
| C. | sulphuric acid |
| D. | phosphoric acid |
| Answer» E. | |
| 123. |
When [H+] is less than 1 x 10-7, the solution is |
| A. | neutral |
| B. | acidic |
| C. | basic |
| D. | amphoteric |
| Answer» D. amphoteric | |
| 124. |
The water molecule which accepts a proton becomes a negatively charged |
| A. | hydroxide ion |
| B. | oxygen ion |
| C. | hydrogen ion |
| D. | hydronium ion |
| Answer» E. | |
| 125. |
How much hydrochloric acid is secreted each day by gastric glands? |
| A. | 1 liter |
| B. | two liters |
| C. | three liters |
| D. | four liters |
| Answer» C. three liters | |
| 126. |
Which of the following is used to clean metals and bricks? |
| A. | hydrochloric acid |
| B. | nitric acid |
| C. | sulphuric acid |
| D. | phosphoric acid |
| Answer» B. nitric acid | |
| 127. |
Considering the methods for making salt, the reaction of acid and metal carbonate gives |
| A. | salt and water |
| B. | salt and hydrogen |
| C. | salt, carbon dioxide and water |
| D. | salt and salt |
| Answer» D. salt and salt | |
| 128. |
What is the pH of the ammonia solution? |
| A. | 8 |
| B. | 9 |
| C. | 10 |
| D. | 11 |
| Answer» E. | |
| 129. |
What is the pH of baking soda? |
| A. | 8 |
| B. | 9 |
| C. | 10 |
| D. | 11 |
| Answer» C. 10 | |
| 130. |
The solution is basic when pH is |
| A. | greater than 6 |
| B. | greater than 7 |
| C. | less than 7 |
| D. | less than 6 |
| Answer» C. less than 7 | |
| 131. |
What is the main component of digestive juice in the stomach? |
| A. | hydrochloric acid |
| B. | sulphuric acid |
| C. | saliva |
| D. | water |
| Answer» B. sulphuric acid | |
| 132. |
What is the term used for a salt which is formed by partial neutralization of an acid? |
| A. | basic salt |
| B. | common salt |
| C. | acid salt |
| D. | normal salt |
| Answer» D. normal salt | |
| 133. |
What is the color of methyl red in the basic solution? |
| A. | yellow |
| B. | blue |
| C. | pink |
| D. | colorless |
| Answer» B. blue | |
| 134. |
Considering the methods for making salt, the reaction of salt and salt gives |
| A. | salt and water |
| B. | salt and hydrogen |
| C. | salt, carbon dioxide and water |
| D. | salt and salt |
| Answer» E. | |
| 135. |
What is the pH at which methyl red changes color? |
| A. | 5.5 |
| B. | 7 |
| C. | 9 |
| D. | 10 |
| Answer» B. 7 | |
| 136. |
What is the optimum pH range of a swimming pool? |
| A. | 6.2-6.6 |
| B. | 7.2-7.6 |
| C. | 7 |
| D. | 8.2-8.6 |
| Answer» C. 7 | |
| 137. |
What is the pH of gastric juice? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 138. |
What is the pH of the seawater? |
| A. | 8 |
| B. | 9 |
| C. | 10 |
| D. | 11 |
| Answer» B. 9 | |
| 139. |
What is the effect of acid on the skin? |
| A. | no effect |
| B. | causes skin cancer |
| C. | corrosive |
| D. | causes harm to skin tissue |
| Answer» D. causes harm to skin tissue | |
| 140. |
What happens to the solution when pH is greater than 7? |
| A. | it becomes acidic |
| B. | it becomes basic |
| C. | it becomes neutral |
| D. | it becomes amphoteric |
| Answer» C. it becomes neutral | |
| 141. |
Secretion of too much acid in the stomach causes |
| A. | nausea |
| B. | vomit |
| C. | indigestion |
| D. | cancer |
| Answer» D. cancer | |
| 142. |
What is the pH at which Phenolphthalein changes color? |
| A. | 5.5 |
| B. | 7 |
| C. | 9 |
| D. | 10 |
| Answer» D. 10 | |
| 143. |
What is the effect of the base on blue litmus paper? |
| A. | it remains blue |
| B. | it turns pink |
| C. | it turns red |
| D. | it becomes colorless |
| Answer» B. it turns pink | |
| 144. |
What is meant by the term 'meso'? |
| A. | top |
| B. | middle |
| C. | turning |
| D. | changing |
| Answer» C. turning | |
| 145. |
Which of the following is a powerful irritant which can aggravate the symptoms of people who suffer from respiratory disorders? |
| A. | sulphur dioxide |
| B. | carbon monoxide |
| C. | carbon dioxide |
| D. | oxides of nitrogen |
| Answer» B. carbon monoxide | |
| 146. |
Which of the following is true about ozone? |
| A. | light blue in colour |
| B. | odourless |
| C. | not harmful |
| D. | not a pollutant |
| Answer» B. odourless | |
| 147. |
Which of the following have an impact on brain development in human beings especially among children? |
| A. | chlorofluorocarbons (CFCs) |
| B. | methane |
| C. | carbon monoxide |
| D. | lead compounds |
| Answer» E. | |
| 148. |
Percentage of hydrogen in the air is |
| A. | 0.99 |
| B. | 0.8 |
| C. | 0.5 |
| D. | 0.25 |
| Answer» E. | |
| 149. |
Height of thermosphere is |
| A. | 50 Km |
| B. | 80 Km |
| C. | above 80 Km |
| D. | 30 Km |
| Answer» D. 30 Km | |
| 150. |
If silk clothes are left in the open air for a week or so, their color fades because of |
| A. | sulphur dioxide is converted into sulphur trioxide |
| B. | dirt |
| C. | carbon monoxide |
| D. | nitrogen oxides |
| Answer» B. dirt | |