MCQOPTIONS
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MCQOPTIONS
This section includes 2268 Mcqs, each offering curated multiple-choice questions to sharpen your Grade7 knowledge and support exam preparation. Choose a topic below to get started.
| 2251. |
All electric objects we see around us like electric bell, electric motor, telephone and loudspeaker use electricity to make |
| A. | voltage |
| B. | current |
| C. | magnetism |
| D. | electromagnets |
| Answer» D. electromagnets | |
| 2252. |
Resistance also depends upon |
| A. | density |
| B. | volume |
| C. | cross-sectional area |
| D. | width |
| Answer» D. width | |
| 2253. |
Insulators do not allow electricity to pass through because their |
| A. | ions are not free to move |
| B. | protons are not free to move |
| C. | electrons are not free to move |
| D. | atoms are held tightly |
| Answer» E. | |
| 2254. |
Amino acids are basically used for |
| A. | respiration |
| B. | photosynthesis |
| C. | growth and repair |
| D. | digestion |
| Answer» D. digestion | |
| 2255. |
To enter the blood vessels, large molecules are |
| A. | burned |
| B. | digested |
| C. | ingested |
| D. | absorbed |
| Answer» C. ingested | |
| 2256. |
Conversion of starch into glucose and other simple sugars is generally known as |
| A. | amylase |
| B. | maltase |
| C. | carbohydrate |
| D. | lipase |
| Answer» D. lipase | |
| 2257. |
The acid in the stomach provides |
| A. | acidic medium for enzymes |
| B. | space for more food |
| C. | alkaline medium for enzymes |
| D. | nutrients to food |
| Answer» B. space for more food | |
| 2258. |
The large molecules in the food that we eat are |
| A. | carbohydrates and fats |
| B. | fats and proteins |
| C. | carbohydrates, fats and proteins |
| D. | carbohydrates and proteins |
| Answer» D. carbohydrates and proteins | |
| 2259. |
Infrared radiation can pass through |
| A. | thick wall |
| B. | glass |
| C. | water |
| D. | log |
| Answer» C. water | |
| 2260. |
In hot places, well insulated house stays |
| A. | warm |
| B. | hot |
| C. | cool |
| D. | normal |
| Answer» D. normal | |
| 2261. |
Just like light, radiant heat can also be |
| A. | reflected |
| B. | turned off |
| C. | used in LED |
| D. | effective |
| Answer» B. turned off | |
| 2262. |
Ideal temperature for warm bath water is usually between |
| A. | 30 °C |
| B. | 40 °C |
| C. | 50 °C |
| D. | 60 °C |
| Answer» D. 60 °C | |
| 2263. |
Compared to hot air, cool air is |
| A. | light |
| B. | good conductor |
| C. | more strong |
| D. | more dense |
| Answer» E. | |
| 2264. |
High frequency means |
| A. | low pitch |
| B. | high pitch |
| C. | low amplitude |
| D. | high wavelength |
| Answer» C. low amplitude | |
| 2265. |
Ships send a small |
| A. | pulse to the sea bed |
| B. | vibration to the tower |
| C. | piece of food to fish |
| D. | beam of sound to check the depth |
| Answer» B. vibration to the tower | |
| 2266. |
Large concert halls have modified roofs which |
| A. | absorb sounds |
| B. | reflect sounds |
| C. | increase loudness of sounds |
| D. | decrease pitch of sounds |
| Answer» B. reflect sounds | |
| 2267. |
Percussion instruments produce notes when they are |
| A. | struck |
| B. | banged |
| C. | blown |
| D. | shaken |
| Answer» C. blown | |
| 2268. |
An example to demonstrate the effect of sound in vacuum is |
| A. | vacuum bell jar |
| B. | simple bell jar |
| C. | air pump and ring |
| D. | air pump and clock |
| Answer» B. simple bell jar | |