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.
| 551. |
Distilled water contains |
| A. | poison |
| B. | bacteria |
| C. | minerals |
| D. | pure water without minerals |
| Answer» E. | |
| 552. |
One-third of the water consumption by humans, goes to |
| A. | drinking water |
| B. | flushing toilets |
| C. | bathing |
| D. | washing cooking utensils |
| Answer» C. bathing | |
| 553. |
The parasite worms spend a part of their life in |
| A. | human stomach |
| B. | human intestines |
| C. | human blood vessels |
| D. | human liver |
| Answer» C. human blood vessels | |
| 554. |
A method which is used to obtain fresh water, is |
| A. | chlorination |
| B. | filtration |
| C. | distillation |
| D. | zinc |
| Answer» D. zinc | |
| 555. |
Electrons are shared in |
| A. | pairs |
| B. | individuals |
| C. | sets of three |
| D. | sets of four |
| Answer» B. individuals | |
| 556. |
The valency of 'bromine' is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 557. |
The symbol of "oxygen" is |
| A. | C |
| B. | N |
| C. | O |
| D. | Fl |
| Answer» D. Fl | |
| 558. |
The number of proton in an 'atom' is also known as |
| A. | atomic number |
| B. | nucleon number |
| C. | mass number |
| D. | photon number |
| Answer» B. nucleon number | |
| 559. |
'Radioisotopes' are used to trace |
| A. | path of elements in a body |
| B. | harmful substances in a human body |
| C. | cancer cells in a human body |
| D. | harmful substances in metals |
| Answer» B. harmful substances in a human body | |
| 560. |
Chemical name for iron is |
| A. | Ferrum |
| B. | Natrium |
| C. | Argentum |
| D. | Wolfram |
| Answer» B. Natrium | |
| 561. |
''Water' is a |
| A. | element |
| B. | compound |
| C. | mixture |
| D. | solute |
| Answer» C. mixture | |
| 562. |
The name of element may differ in languages but it has same |
| A. | chemical symbol |
| B. | chemical formula |
| C. | chemical properties |
| D. | occurrence |
| Answer» B. chemical formula | |
| 563. |
Helium is considered to be the abundantly found gas, ranking in number |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 564. |
Metals are good conductors of heat and electricity. They have high |
| A. | densities |
| B. | melting point |
| C. | boiling point |
| D. | all of them |
| Answer» E. | |
| 565. |
Molecules which contain fixed number of same type of atoms are molecules or |
| A. | elements |
| B. | compounds |
| C. | mixtures |
| D. | all of them |
| Answer» B. compounds | |
| 566. |
The nucleus in an atom consists of |
| A. | protons |
| B. | neutrons |
| C. | electrons |
| D. | both a and b |
| Answer» E. | |
| 567. |
The smallest particle of an atom which exists, is called |
| A. | matter |
| B. | atom |
| C. | proton |
| D. | electron |
| Answer» C. proton | |
| 568. |
The total number of protons in atom of each element is called its |
| A. | atomic number |
| B. | atomic mass |
| C. | molecular mass |
| D. | atomic scale |
| Answer» B. atomic mass | |
| 569. |
The diameter of a 'nucleus' is |
| A. | 0.00001nm |
| B. | 1nm |
| C. | 0.1nm |
| D. | 0.01nm |
| Answer» B. 1nm | |
| 570. |
The hotter the object, |
| A. | the more heat absorbed |
| B. | the less heat released |
| C. | the less heat absorbed |
| D. | the more heat released or emitted |
| Answer» E. | |
| 571. |
The excess warming of earth due to greenhouse stimulator is called |
| A. | earth warming |
| B. | CFC warming |
| C. | greenhouse warming |
| D. | global warming |
| Answer» E. | |
| 572. |
The proportion of heat loss through walls is |
| A. | half |
| B. | one third |
| C. | quarter |
| D. | one fifth |
| Answer» C. quarter | |
| 573. |
The higher the temperature, the |
| A. | more calm vibration in particles |
| B. | less violent vibration in particles |
| C. | more violent vibration in particles |
| D. | |
| Answer» D. | |
| 574. |
If we stir a cup of hot coffee with a plastic spoon, the handle of the spoon will |
| A. | get hot |
| B. | remain cold |
| C. | change its shape |
| D. | remain unchange |
| Answer» B. remain cold | |
| 575. |
For all hydrogen to be used up, it will take more than |
| A. | 5,000 years |
| B. | 5 million years |
| C. | 5 billion years |
| D. | 5 trillion years |
| Answer» D. 5 trillion years | |
| 576. |
A single teaspoon of a 'white dwarf' would weigh many |
| A. | kilograms |
| B. | milligrams |
| C. | tons |
| D. | pounds |
| Answer» D. pounds | |
| 577. |
Names of two stars of "Sirius" are |
| A. | Sirius-1 and Sirius-2 |
| B. | Sirius-X and Sirius-Y |
| C. | Sirius-A and Sirius-B |
| D. | Sirius-I and Sirius-II |
| Answer» D. Sirius-I and Sirius-II | |
| 578. |
The full form of "SDO" is |
| A. | Sun Determining Observatory |
| B. | Solar Determining Objective |
| C. | Solar Dynamic Objective |
| D. | Solar Dynamics Laboratory |
| Answer» E. | |
| 579. |
'Ulysses' also transmits information of |
| A. | inner core |
| B. | mantle |
| C. | solar wind |
| D. | outer core |
| Answer» D. outer core | |
| 580. |
Imaginary pictures were drawn about |
| A. | constellations |
| B. | horoscopes |
| C. | ptolemy |
| D. | prominence |
| Answer» B. horoscopes | |
| 581. |
'SOHO' will take pictures of the sun after every |
| A. | 2 seconds |
| B. | 1 second |
| C. | 0.75 seconds |
| D. | 0.5 seconds |
| Answer» D. 0.5 seconds | |
| 582. |
In 20th centaury, it was thought that the milky way was the only galaxy in |
| A. | universe |
| B. | sky |
| C. | world |
| D. | globe |
| Answer» C. world | |
| 583. |
There is only one type of star in the elliptical galaxy and that is |
| A. | young stars |
| B. | middle aged stars |
| C. | old aged stars |
| D. | supergiant red stars |
| Answer» D. supergiant red stars | |
| 584. |
The spectrum tells the astronomers that how |
| A. | big a star is |
| B. | hot a star is |
| C. | bright a star is |
| D. | colorful a star is |
| Answer» C. bright a star is | |
| 585. |
The largest sea on the earth is |
| A. | Arabian sea |
| B. | South China sea |
| C. | Mediterranean sea |
| D. | Dead sea |
| Answer» C. Mediterranean sea | |
| 586. |
The reason for presence of water underground is |
| A. | oceans make tunnels due to high water pressure |
| B. | due to salt in water, it starts making space in the soil for movement |
| C. | some of the rain water is soaked into soil |
| D. | rivers eventually run underground |
| Answer» D. rivers eventually run underground | |
| 587. |
If not receives treatment, trachoma may cause |
| A. | deep eye infection |
| B. | eye injuries |
| C. | blindness |
| D. | dizziness |
| Answer» D. dizziness | |
| 588. |
The most essential element for crop is |
| A. | water |
| B. | fertilizers |
| C. | soil |
| D. | humidity |
| Answer» B. fertilizers | |
| 589. |
The alum is a compound of two elements, those are |
| A. | aluminum and nitrate |
| B. | aluminum and sulfate |
| C. | sodium and nitrate |
| D. | sodium and sulfate |
| Answer» C. sodium and nitrate | |
| 590. |
A separation technique which uses fractionating column to separate different liquid components in a mixture with different boiling points by heating the mixture is called |
| A. | fractional distillation |
| B. | filtration |
| C. | evaporation |
| D. | distillation |
| Answer» B. filtration | |
| 591. |
Air is a mixture of |
| A. | elements |
| B. | compounds |
| C. | gases |
| D. | molecules |
| Answer» D. molecules | |
| 592. |
A technique which is used to separate and identify the different constituents of mixture is called |
| A. | paper chromatography |
| B. | color chromatography |
| C. | dye chromatography |
| D. | chemical chromatography |
| Answer» B. color chromatography | |
| 593. |
A process in which liquid changes into vapor or gas by boiling, is called |
| A. | distillation |
| B. | filtration |
| C. | evaporation |
| D. | fractional distillation |
| Answer» D. fractional distillation | |
| 594. |
Constituents of an element can be separated through |
| A. | experiment |
| B. | physical processes |
| C. | physical method |
| D. | physical means |
| Answer» D. physical means | |
| 595. |
As compare to normal water the concentration of oxygen in hot water is |
| A. | low |
| B. | high |
| C. | same |
| D. | equal |
| Answer» B. high | |
| 596. |
Most of the reservoirs are built on |
| A. | roofs |
| B. | lowlands |
| C. | mountains and high lands |
| D. | sea beds |
| Answer» D. sea beds | |
| 597. |
Pesticides make the river water |
| A. | poisonous |
| B. | saltish |
| C. | hot |
| D. | sweet |
| Answer» B. saltish | |
| 598. |
The water we use comes from |
| A. | rain and ice |
| B. | rain and seas |
| C. | oceans and rivers |
| D. | all of above |
| Answer» E. | |
| 599. |
As compare to water, pesticides and insecticides have |
| A. | higher boiling point |
| B. | lower boiling point |
| C. | equal boiling point |
| D. | extremely high boiling point |
| Answer» C. equal boiling point | |
| 600. |
The acid which is found in the sting of a bee and the bite of an ant is |
| A. | carbonic acid |
| B. | lactic acid |
| C. | formic acid |
| D. | citric acid |
| Answer» D. citric acid | |