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.
| 501. |
By placing our hand above a hot object, we can feel heat because |
| A. | it is releasing heat |
| B. | our hand is releasing heat |
| C. | our hand is cooling down |
| D. | our hand is heating up |
| Answer» B. our hand is releasing heat | |
| 502. |
Quilts and jackets keep us warm by |
| A. | trapping air |
| B. | preventing release of heat from our body |
| C. | heating itself up |
| D. | maintaining body temperature |
| Answer» B. preventing release of heat from our body | |
| 503. |
When current is passed through sodium chloride solution, the ionic bonds |
| A. | split |
| B. | get strong |
| C. | join |
| D. | coagulate |
| Answer» B. get strong | |
| 504. |
Simple circuits have |
| A. | single pin plug |
| B. | double pin plug |
| C. | triple pin plug |
| D. | massive pin plug |
| Answer» C. triple pin plug | |
| 505. |
The magnet which is used in electric motors, is |
| A. | huge in size |
| B. | small in size |
| C. | mechanical |
| D. | rod shaped |
| Answer» C. mechanical | |
| 506. |
The inert gas in the bulb filament is |
| A. | neon |
| B. | argon |
| C. | xenon |
| D. | radon |
| Answer» C. xenon | |
| 507. |
The flow of electrons in a wire is known as |
| A. | electric current |
| B. | magnetic current |
| C. | ionic current |
| D. | atomic current |
| Answer» B. magnetic current | |
| 508. |
Due to large angle of incidence, the light |
| A. | divides into seven colors of the spectrum |
| B. | refracts inwards |
| C. | reflects back |
| D. | divides into red and blue color |
| Answer» D. divides into red and blue color | |
| 509. |
We see yellow color in our eyes because |
| A. | the cones shine like dots |
| B. | the rods shine like dots |
| C. | the cones shine alternatively to dots |
| D. | the rods shine alternatively to dots |
| Answer» B. the rods shine like dots | |
| 510. |
If light enters the glass with an angle of 42 degree or greater, the light will |
| A. | refract |
| B. | refract more |
| C. | reflect totally internally |
| D. | refract totally internally |
| Answer» D. refract totally internally | |
| 511. |
White light can also be made by |
| A. | one color |
| B. | two colors |
| C. | three colors |
| D. | four colors |
| Answer» D. four colors | |
| 512. |
If angle of incidence of light entering a dense object is zero, then light will |
| A. | keep on going straight |
| B. | move in curved paths within the object |
| C. | complete half distance in the object |
| D. | keep on going opposite direction |
| Answer» B. move in curved paths within the object | |
| 513. |
American space probe was launched in |
| A. | 1880 |
| B. | 1990 |
| C. | 2000 |
| D. | 2010 |
| Answer» C. 2000 | |
| 514. |
The constellations that remain there for the whole year, are known as |
| A. | circumpolar constellations |
| B. | seasonal constellations |
| C. | northern constellations |
| D. | southern constellations |
| Answer» B. seasonal constellations | |
| 515. |
Like other living things, the sun will complete its lifetime and |
| A. | become a cold ball |
| B. | die |
| C. | become a comet |
| D. | turn into old star |
| Answer» C. become a comet | |
| 516. |
If you live in China, you won't be able to see the constellation of |
| A. | America |
| B. | United kingdom |
| C. | Southern Hemisphere |
| D. | Northern Hemisphere |
| Answer» D. Northern Hemisphere | |
| 517. |
Ulysses was sending back information about sun till |
| A. | 2005 |
| B. | 2009 |
| C. | 2010 |
| D. | 2011 |
| Answer» C. 2010 | |
| 518. |
Water is broken down into small units by passing it through |
| A. | heat |
| B. | electricity |
| C. | magnet |
| D. | current |
| Answer» C. magnet | |
| 519. |
The formation of compounds involve |
| A. | chemical reaction |
| B. | physical reaction |
| C. | evaporation |
| D. | distillation |
| Answer» B. physical reaction | |
| 520. |
With one hundred elements the compounds that may be made, will be above |
| A. | millions |
| B. | thousands |
| C. | hundreds |
| D. | trillions |
| Answer» B. thousands | |
| 521. |
The dense white fumes which can be seen upon gas ammonia are due to mixing of |
| A. | hydrogen chloride |
| B. | nitrogen dioxide |
| C. | ammonium chloride |
| D. | calcium chloride |
| Answer» B. nitrogen dioxide | |
| 522. |
To make specific compound, elements are mixed in a fix proportion by |
| A. | mass |
| B. | weight |
| C. | volume |
| D. | density |
| Answer» B. weight | |
| 523. |
The varnish which was originally developed for coating the spars of sailing ships is called |
| A. | spar varnish |
| B. | brown varnish |
| C. | yellow varnish |
| D. | blue varnish |
| Answer» C. yellow varnish | |
| 524. |
Polyethene is |
| A. | good conductor of heat |
| B. | good conductor of electricity |
| C. | poor insulator of electricity |
| D. | good insulator of electricity |
| Answer» E. | |
| 525. |
Cooking food is an example of |
| A. | condensation reaction |
| B. | exothermic reaction |
| C. | reversible reaction |
| D. | endothermic reaction |
| Answer» E. | |
| 526. |
A reaction in which liquid freezes and its solid form changes into liquid at same temperature, is called |
| A. | dual side reaction |
| B. | dual side process |
| C. | reversible reaction |
| D. | reversible process |
| Answer» D. reversible process | |
| 527. |
Gases are |
| A. | incompressible |
| B. | compressible |
| C. | colorful |
| D. | dense than liquids and solids |
| Answer» C. colorful | |
| 528. |
Generally methane gas is known as |
| A. | compressed gas |
| B. | liquid gas |
| C. | natural gas |
| D. | artificial gas |
| Answer» D. artificial gas | |
| 529. |
Molecules in high density polythene are |
| A. | closely packed than low density polythene |
| B. | far apart than in low density polythene |
| C. | more vigorous than in low density polythene |
| D. | more violent than in low density polythene |
| Answer» B. far apart than in low density polythene | |
| 530. |
Most of the fuels such as petroleum has |
| A. | carbohydrates |
| B. | fats |
| C. | hydrocarbons |
| D. | metals |
| Answer» D. metals | |
| 531. |
'Ethene' is |
| A. | alkane |
| B. | alkene |
| C. | alcohol |
| D. | carboxylic acid |
| Answer» C. alcohol | |
| 532. |
Sounds of dead leaves and cats are known as |
| A. | loud sounds |
| B. | soft sounds |
| C. | high pitched sounds |
| D. | low pitched sounds |
| Answer» C. high pitched sounds | |
| 533. |
The higher the frequency, the more the |
| A. | note of sound |
| B. | depth of sound |
| C. | amplitude of sound |
| D. | wavelength of sound |
| Answer» B. depth of sound | |
| 534. |
Animal that uses echoes is known as |
| A. | bat |
| B. | snake |
| C. | rat |
| D. | rabbit |
| Answer» B. snake | |
| 535. |
Frequency is measured by unit which is called |
| A. | meter |
| B. | hertz |
| C. | watt |
| D. | ohm |
| Answer» C. watt | |
| 536. |
The most important characteristic of a 'music' is its |
| A. | bass effect |
| B. | harmony |
| C. | rhythm |
| D. | scale |
| Answer» D. scale | |
| 537. |
A substance will float on surface of water if its density is less than |
| A. | liquid |
| B. | gas |
| C. | both a and b |
| D. | aqueous |
| Answer» D. aqueous | |
| 538. |
In order to reduce air and water resistance, objects are shaped in |
| A. | streamline |
| B. | oblongata |
| C. | rectangular |
| D. | conical |
| Answer» B. oblongata | |
| 539. |
The relationship between force, mass and acceleration is |
| A. | F=ma |
| B. | F=m-a |
| C. | F=m/a |
| D. | F=a/m |
| Answer» B. F=m-a | |
| 540. |
There will be a great distance in stopping a vehicle which is moving |
| A. | slowly |
| B. | steady |
| C. | fast |
| D. | continuously |
| Answer» D. continuously | |
| 541. |
The mass of a substance per unit of volume is called its |
| A. | weight |
| B. | density |
| C. | volume |
| D. | gravity |
| Answer» C. volume | |
| 542. |
As we turn older, our ears get |
| A. | less sensitive to low pitched sound |
| B. | more sensitive to low pitched sound |
| C. | less sensitive to high pitched sound |
| D. | more sensitive to high pitched sound |
| Answer» D. more sensitive to high pitched sound | |
| 543. |
If frequency of sound wave is 100 Hz, it will send |
| A. | 1 wave in 100 seconds |
| B. | 2 waves in 50 seconds |
| C. | 100 waves in one second |
| D. | 50 waves in two seconds |
| Answer» D. 50 waves in two seconds | |
| 544. |
Musical sounds are organized into |
| A. | notes |
| B. | pitch |
| C. | wave fronts |
| D. | phases |
| Answer» B. pitch | |
| 545. |
Short waves have |
| A. | low energy |
| B. | high energy |
| C. | same energy as long waves |
| D. | low frequency |
| Answer» C. same energy as long waves | |
| 546. |
If we put our ear by the wall, we will |
| A. | not hear anything |
| B. | hear everything from other side |
| C. | some sounds from other side but not clearly |
| D. | noise of traffic, aircrafts and machines |
| Answer» C. some sounds from other side but not clearly | |
| 547. |
Acids turns |
| A. | red litmus blue |
| B. | blue litmus red |
| C. | change after long time |
| D. | no change |
| Answer» C. change after long time | |
| 548. |
The 'solvents' which keep us alive includes |
| A. | air |
| B. | water |
| C. | oxygen |
| D. | carbon |
| Answer» D. carbon | |
| 549. |
When copper sulphate solution is added to sodium hydroxide solution, it gives off pale blue cloudy suspension of |
| A. | copper hydroxide |
| B. | copper oxide |
| C. | copper chloride |
| D. | copper metal |
| Answer» B. copper oxide | |
| 550. |
An artificial lake made by building a dam across river is called a |
| A. | pond |
| B. | reservoir |
| C. | lake |
| D. | stream |
| Answer» C. lake | |