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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.
| 1301. |
When light strikes the far edge of a dense object, it refracts |
| A. | backwards |
| B. | upwards |
| C. | downwards |
| D. | the second time |
| Answer» E. | |
| 1302. |
A blackboard looks black because it |
| A. | reflects all colors |
| B. | absorbs all colors |
| C. | refracts all colors |
| D. | absorbs black color only |
| Answer» C. refracts all colors | |
| 1303. |
A blue filter would allow |
| A. | green and red to pass |
| B. | blue and its components to pass |
| C. | blue color only to pass |
| D. | all colors except blue |
| Answer» D. all colors except blue | |
| 1304. |
Sunlight travels through a complete empty space known as |
| A. | medium |
| B. | exosphere |
| C. | troposphere |
| D. | vacuum |
| Answer» E. | |
| 1305. |
Atom means |
| A. | divisible |
| B. | multiplied |
| C. | added |
| D. | indivisible |
| Answer» E. | |
| 1306. |
If you combine atoms of sodium and chlorine, they will form |
| A. | chlorine sodium |
| B. | sodium chloride |
| C. | sodium ion |
| D. | chloride ion |
| Answer» C. sodium ion | |
| 1307. |
The symbol of lithium is |
| A. | H |
| B. | He |
| C. | Li |
| D. | Na |
| Answer» D. Na | |
| 1308. |
Steam is used to turn |
| A. | dynamos |
| B. | generators |
| C. | turbines |
| D. | transformers |
| Answer» D. transformers | |
| 1309. |
The negative ion is known as |
| A. | cation |
| B. | anion |
| C. | positron |
| D. | negatron |
| Answer» C. positron | |
| 1310. |
Mud, water and other substances form |
| A. | mud |
| B. | clay |
| C. | sand |
| D. | cement |
| Answer» C. sand | |
| 1311. |
Saline solution is mixture of |
| A. | water |
| B. | salt |
| C. | gases |
| D. | both a and b |
| Answer» D. both a and b | |
| 1312. |
The 'technique' which is used in water treatment plants, is |
| A. | distillation |
| B. | filtration |
| C. | evaporation |
| D. | fractional distillation |
| Answer» C. evaporation | |
| 1313. |
Sea water is left in shallow pans to |
| A. | evaporate |
| B. | filter |
| C. | condense |
| D. | distill |
| Answer» B. filter | |
| 1314. |
Boiling point is a point at which liquid turns in to |
| A. | solid |
| B. | gas |
| C. | molten shape |
| D. | vapours |
| Answer» C. molten shape | |
| 1315. |
Electrons release energy in the form of |
| A. | heat energy |
| B. | thermal energy |
| C. | sound energy |
| D. | light energy |
| Answer» C. sound energy | |
| 1316. |
In 1 minute, 1kW electric fire uses 10 times as much energy as a |
| A. | 1W LED light |
| B. | 10W LED light |
| C. | 100W bulb |
| D. | 0.1W RC Car |
| Answer» D. 0.1W RC Car | |
| 1317. |
'Earphones' are |
| A. | magnets |
| B. | small loudspeakers |
| C. | soft speakers |
| D. | magnetized speakers |
| Answer» C. soft speakers | |
| 1318. |
Turning off a switch also put the bulb off, this is because the circuit is |
| A. | cooled down |
| B. | not complete |
| C. | joined |
| D. | unbroken |
| Answer» C. joined | |
| 1319. |
Another example of 'electromagnets' in trains is |
| A. | bullet train |
| B. | passenger train |
| C. | maglev train |
| D. | cargo train |
| Answer» D. cargo train | |
| 1320. |
If hydrogen forms only one bond, then the valency of hydrogen is |
| A. | 1 |
| B. | -1 |
| C. | 7 |
| D. | 2 |
| Answer» B. -1 | |
| 1321. |
Electrons revolve around the nucleus as fast as |
| A. | sound in air |
| B. | sound in liquid |
| C. | sound in solid |
| D. | sound in light |
| Answer» E. | |
| 1322. |
The theory about atom was first put forward by a Greek philosopher |
| A. | Williams |
| B. | Democritus |
| C. | Isaac Newton |
| D. | Galileo |
| Answer» C. Isaac Newton | |
| 1323. |
As neutrons have electrical charge, they do not effect |
| A. | bonding properties |
| B. | physical properties |
| C. | chemical properties |
| D. | thermal properties |
| Answer» B. physical properties | |
| 1324. |
The isotope of uranium (Uranium-238) contains |
| A. | 141 neutrons |
| B. | 142 neutrons |
| C. | 146 neutrons |
| D. | 149 neutrons |
| Answer» D. 149 neutrons | |
| 1325. |
The sea which joins the ocean is |
| A. | Arabian sea |
| B. | Mediterranean sea |
| C. | Red sea |
| D. | Black sea |
| Answer» B. Mediterranean sea | |
| 1326. |
The process in which water is passed through filter beds of sand and gravel to remove smaller particles of dust is called |
| A. | coagulation |
| B. | sedimentation |
| C. | filtration |
| D. | chlorination |
| Answer» D. chlorination | |
| 1327. |
Skin diseases, eye infections and diarrhea are the examples of |
| A. | water borne diseases |
| B. | water washed diseases |
| C. | water related diseases |
| D. | anti water diseases |
| Answer» C. water related diseases | |
| 1328. |
An addition of small dose of chlorine gas to the filtered water is known as |
| A. | coagulation |
| B. | sedimentation |
| C. | filtration |
| D. | chlorination |
| Answer» E. | |
| 1329. |
In our body, percentage of water is |
| A. | 0.5 |
| B. | 0.6 |
| C. | 0.7 |
| D. | 0.9 |
| Answer» D. 0.9 | |
| 1330. |
The vibration of cone produces |
| A. | light |
| B. | sound |
| C. | heat |
| D. | crystals |
| Answer» C. heat | |
| 1331. |
Filament is present in |
| A. | center of the sealed glass |
| B. | front of the sealed glass |
| C. | roots of the sealed glass |
| D. | head of the sealed glass |
| Answer» B. front of the sealed glass | |
| 1332. |
The electrolyzed substance is known as |
| A. | conductor |
| B. | insulator |
| C. | electrolyte |
| D. | electro decay |
| Answer» D. electro decay | |
| 1333. |
If a live wire touches the metal casing of an object, the metal casing becomes |
| A. | neutral |
| B. | earthed |
| C. | live |
| D. | hot |
| Answer» D. hot | |
| 1334. |
The 12V car battery would |
| A. | kill you |
| B. | electrocute you |
| C. | give you a nasty shock |
| D. | cause your body burst |
| Answer» D. cause your body burst | |
| 1335. |
The positive electrode of the electrolytic cell is known as |
| A. | cathode |
| B. | anode |
| C. | posit rode |
| D. | nematode |
| Answer» C. posit rode | |
| 1336. |
The relationship between magnetism and electricity was discovered in |
| A. | 1818 |
| B. | 1819 |
| C. | 1820 |
| D. | 1821 |
| Answer» C. 1820 | |
| 1337. |
Current conducting path through wires, bulb and battery is known as |
| A. | conductor |
| B. | circuit |
| C. | electrical flow |
| D. | convectional flow |
| Answer» C. electrical flow | |
| 1338. |
A simple enclosed length of wire that has a low melting point is known as |
| A. | resistor |
| B. | fuse |
| C. | circuit breaker |
| D. | thermistor |
| Answer» C. circuit breaker | |
| 1339. |
The energy which is used to push electrons towards the positive terminal is known as |
| A. | mechanical energy |
| B. | kinetic energy |
| C. | electrical energy |
| D. | potential energy |
| Answer» D. potential energy | |
| 1340. |
'Atom' is a |
| A. | Latin word |
| B. | French word |
| C. | Greek word |
| D. | Roman word |
| Answer» D. Roman word | |
| 1341. |
The turbines are connected to |
| A. | dynamos |
| B. | generators |
| C. | turbines |
| D. | transformers |
| Answer» C. turbines | |
| 1342. |
'Helium' is a monoatomic gas and its chemical formula is |
| A. | He2 |
| B. | He2 |
| C. | He |
| D. | H |
| Answer» D. H | |
| 1343. |
Experiment which suggested that each chemical element is made up of different atoms, was carried out by |
| A. | John Green |
| B. | John Dalton |
| C. | Albert Einstein |
| D. | Isaac Newton |
| Answer» C. Albert Einstein | |
| 1344. |
The mass number of 'helium' is |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 1345. |
Earth wire is connected to the |
| A. | ground |
| B. | appliance |
| C. | power house |
| D. | transformer |
| Answer» B. appliance | |
| 1346. |
Poor conductor of electricity is |
| A. | silver |
| B. | aluminum |
| C. | water |
| D. | copper |
| Answer» D. copper | |
| 1347. |
In conductors, electrons can flow because their |
| A. | ions are free |
| B. | protons are free |
| C. | electrons are free |
| D. | negative ions are free |
| Answer» D. negative ions are free | |
| 1348. |
In parallel circuit, the current is |
| A. | equal |
| B. | unequal |
| C. | more powerful |
| D. | less powerful |
| Answer» C. more powerful | |
| 1349. |
The electromagnet consists of a coil of wire with |
| A. | steel magnet in it |
| B. | iron magnet in it |
| C. | steel magnet above it |
| D. | iron magnet below it |
| Answer» C. steel magnet above it | |
| 1350. |
Space probes which were launched to explore planets Jupiter and Saturn were, namely |
| A. | voyager-1 |
| B. | voyager-2 |
| C. | voyager-x |
| D. | both a and b |
| Answer» D. both a and b | |