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.
| 251. |
Which of the following causes hard deposits in kidneys and joints when taken in excess amount? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» E. | |
| 252. |
Vitamin A is necessary for |
| A. | eyes and skin |
| B. | energy production in cells |
| C. | healing wounds and preventing colds |
| D. | bones and teeth |
| Answer» B. energy production in cells | |
| 253. |
Which of the following is converted to dextrin which is used as an adhesive for stamps and as wallpaper glue? |
| A. | cellulose |
| B. | starch |
| C. | glucose |
| D. | fructose |
| Answer» C. glucose | |
| 254. |
The pH at which methyl red changes color is |
| A. | 7 |
| B. | 5.5 |
| C. | 3.8 |
| D. | 9 |
| Answer» C. 3.8 | |
| 255. |
When a metal replaces hydrogen atom then the compound form is |
| A. | oxide |
| B. | ether |
| C. | salt |
| D. | alcohol |
| Answer» D. alcohol | |
| 256. |
As an electrolyte, water is |
| A. | strong |
| B. | neutral |
| C. | weak |
| D. | good insulator |
| Answer» D. good insulator | |
| 257. |
The acid used for the manufacture of fertilizers and explosives is |
| A. | nitric acid |
| B. | sulfuric acid |
| C. | phosphoric acid |
| D. | hydrochloric acid |
| Answer» B. sulfuric acid | |
| 258. |
KOH is used in the making of |
| A. | drain cleaner |
| B. | antacid |
| C. | cement |
| D. | liquid soap |
| Answer» E. | |
| 259. |
Which of the following is a group of several vitamins? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» C. vitamin C | |
| 260. |
Which of the following must be present in our diet? |
| A. | essential amino acids |
| B. | non-essential amino acids |
| C. | lipids |
| D. | proteins |
| Answer» B. non-essential amino acids | |
| 261. |
Important sources of proteins are |
| A. | meat |
| B. | eggs |
| C. | cheese |
| D. | all of above |
| Answer» E. | |
| 262. |
As compared to the energy provided by carbohydrates, how much energy per gram is provided by fats and oils? |
| A. | twice |
| B. | thrice |
| C. | four times |
| D. | five times |
| Answer» B. thrice | |
| 263. |
Proteins work in the body to |
| A. | transport and store oxygen and nutrients |
| B. | speed up reactions |
| C. | regulate important systems |
| D. | all of above |
| Answer» E. | |
| 264. |
The fourth step of sewage water treatment is called |
| A. | primary sewage treatment |
| B. | secondary sewage treatment |
| C. | activated sludge treatment |
| D. | chlorination |
| Answer» E. | |
| 265. |
What is the first step of raw water treatment? |
| A. | sedimentation |
| B. | coagulation |
| C. | filtration |
| D. | chlorination |
| Answer» B. coagulation | |
| 266. |
Property due to which water acts as a universal solvent is its |
| A. | polarity only |
| B. | ability to make hydrogen bond only |
| C. | strong dipole dipole interaction |
| D. | polarity and ability to make hydrogen bond |
| Answer» E. | |
| 267. |
Which of the following is a disease in which excess of bile from the liver enters the blood and causes yellowness of skin and eyes? |
| A. | cholera |
| B. | dysentery |
| C. | jaundice |
| D. | hepatitis |
| Answer» D. hepatitis | |
| 268. |
Which of the following is the most abundant salt in seawater? |
| A. | magnesium chloride |
| B. | calcium chloride |
| C. | sodium chloride |
| D. | sodium nitrate |
| Answer» D. sodium nitrate | |
| 269. |
An alkane with molecular formula C9H20 is called |
| A. | butane |
| B. | octane |
| C. | Nonane |
| D. | Decane |
| Answer» D. Decane | |
| 270. |
What is the other term used for saturated hydrocarbons? |
| A. | alkenes |
| B. | alkynes |
| C. | alkanes |
| D. | none of above |
| Answer» D. none of above | |
| 271. |
What is the term used for the self-linking ability of carbon? |
| A. | catenation |
| B. | isomerism |
| C. | Bessemerization |
| D. | carbonation |
| Answer» B. isomerism | |
| 272. |
The first antiseptic used in operation theatre was |
| A. | alcohol |
| B. | alkane |
| C. | acid |
| D. | phenol |
| Answer» E. | |
| 273. |
The origin of carbon compounds is |
| A. | non- living beings |
| B. | living beings |
| C. | organic |
| D. | artificial |
| Answer» C. organic | |
| 274. |
Unit of the equilibrium constant for N2 + O2 2NO is |
| A. | no units |
| B. | mol dm-3 |
| C. | dm3mol-1 |
| D. | [mol dm-3]-2 |
| Answer» B. mol dm-3 | |
| 275. |
In the reverse reaction SO3 decomposes in to |
| A. | S and O |
| B. | S and O2 |
| C. | S2 and O |
| D. | SO2 and O2 |
| Answer» E. | |
| 276. |
Due to the high concentration of reactants, the rate of the forward reaction is |
| A. | lowest |
| B. | moderate |
| C. | highest |
| D. | minimal |
| Answer» D. minimal | |
| 277. |
What percentage of ammonia is given after cooling the equilibrium mixture by the Haber process? |
| A. | 20 percent |
| B. | 33 percent |
| C. | 100 percent |
| D. | 98 percent |
| Answer» E. | |
| 278. |
Unit of the equilibrium constant for H2 + CO2 H2O + CO is |
| A. | no units |
| B. | mol dm-3 |
| C. | dm3mol-1 |
| D. | [mol dm-3]-2 |
| Answer» B. mol dm-3 | |
| 279. |
Which of the following is used in infant foods? |
| A. | protease |
| B. | amylase |
| C. | diastase |
| D. | lactase |
| Answer» E. | |
| 280. |
By the help of fermentation, starch is converted to |
| A. | rectified spirit |
| B. | dextrin |
| C. | cellulose |
| D. | sucrose |
| Answer» B. dextrin | |
| 281. |
Maltose is obtained from |
| A. | sugarcane |
| B. | fruits |
| C. | cereals |
| D. | plants |
| Answer» D. plants | |
| 282. |
Which of the following helps in the chemical transmission of images from the eye to the brain? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» B. vitamin B | |
| 283. |
Vitamin K is necessary for |
| A. | eyes and skin |
| B. | energy production in cells |
| C. | antioxidant |
| D. | blood clotting |
| Answer» E. | |
| 284. |
Addition of hydrogen to ethene forms |
| A. | methane |
| B. | propane |
| C. | butane |
| D. | ethane |
| Answer» E. | |
| 285. |
Higher members of alkynes are |
| A. | solids |
| B. | liquids |
| C. | gases |
| D. | plasma |
| Answer» B. liquids | |
| 286. |
Higher members of alkenes are |
| A. | solids |
| B. | liquids |
| C. | gases |
| D. | plasma |
| Answer» B. liquids | |
| 287. |
How does fluorine react? |
| A. | explosively |
| B. | slowly in dark but rapidly in strong sunlight |
| C. | requires high temperature or strong sun light |
| D. | essentially unreactive |
| Answer» B. slowly in dark but rapidly in strong sunlight | |
| 288. |
Which of the following is used as a simple test for the presence of unsaturation? |
| A. | red colour of bromine solution |
| B. | Decolourization of bromine solution |
| C. | orange colour of bromine solution |
| D. | none of above |
| Answer» C. orange colour of bromine solution | |
| 289. |
Excess energy is stored by plants in the form of |
| A. | starch |
| B. | glucose |
| C. | glycogen |
| D. | cellulose |
| Answer» B. glucose | |
| 290. |
Which of the following experimentally proved that in addition to carbohydrates, fats, proteins, and minerals, certain missing factors were also required for healthy growth? |
| A. | C. Eijkman |
| B. | F.G Hopkins |
| C. | Casmir funk |
| D. | J.Watson |
| Answer» C. Casmir funk | |
| 291. |
How many carbon atoms are contained by monosaccharides? |
| A. | 2 to 9 |
| B. | 3 to 6 |
| C. | 4 to 8 |
| D. | 10 to 15 |
| Answer» C. 4 to 8 | |
| 292. |
Which of the following is further classified as trioses, tetroses, pentoses, hexoses, etc.? |
| A. | monosaccharides |
| B. | oligosaccharides |
| C. | polysaccharides |
| D. | starch |
| Answer» B. oligosaccharides | |
| 293. |
Which of the following is the main sugar in milk and dairy products? |
| A. | glucose |
| B. | sucrose |
| C. | maltose |
| D. | lactose |
| Answer» E. | |
| 294. |
The human body can synthesize only |
| A. | 12 amino acids |
| B. | 10 amino acids |
| C. | 15 amino acids |
| D. | 5 amino acids |
| Answer» C. 15 amino acids | |
| 295. |
Which of the following is not true about RNA? |
| A. | it is synthesized by DNA |
| B. | it has deoxyribose sugar |
| C. | it has single strand |
| D. | it is responsible for directing synthesis of new proteins |
| Answer» C. it has single strand | |
| 296. |
Which of the following are long-chain carboxylic acids? |
| A. | fats |
| B. | oils |
| C. | proteins |
| D. | fatty acids |
| Answer» E. | |
| 297. |
Cotton is an example of pure |
| A. | cellulose |
| B. | sucrose |
| C. | starch |
| D. | cloth |
| Answer» B. sucrose | |
| 298. |
Source of palmitic acid is |
| A. | butter |
| B. | palm oil |
| C. | beef fat |
| D. | olive oil |
| Answer» C. beef fat | |
| 299. |
Which of the following is used as common table sugar? |
| A. | glucose |
| B. | fructose |
| C. | maltose |
| D. | sucrose |
| Answer» E. | |
| 300. |
Which of the following is a protein coded by DNA? |
| A. | amylase |
| B. | insulin |
| C. | pepsin |
| D. | lipase |
| Answer» C. pepsin | |