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.
| 1601. |
When two or more notes with different pitches are sounded together, |
| A. | disco is created |
| B. | peace is created |
| C. | harmony is created |
| D. | beat is created |
| Answer» D. beat is created | |
| 1602. |
Sound travels fastest in solids because the |
| A. | particles vibrate more vigorously |
| B. | particles move fast |
| C. | collision of particles is greater |
| D. | particles are closely packed |
| Answer» E. | |
| 1603. |
Minerals in water include |
| A. | calcium |
| B. | magnesium |
| C. | potassium |
| D. | all of above |
| Answer» E. | |
| 1604. |
Nitrogen is used to preserve food by freezing |
| A. | solid state |
| B. | liquid state |
| C. | molten state |
| D. | vapor state |
| Answer» C. molten state | |
| 1605. |
A mixture of oxygen gas and 'acetylene' is used for |
| A. | scuba diving |
| B. | welding |
| C. | spaceships |
| D. | hot air balloons |
| Answer» C. spaceships | |
| 1606. |
Light bulbs are filled with |
| A. | helium gas |
| B. | neon gas |
| C. | argon gas |
| D. | hydrogen gas |
| Answer» D. hydrogen gas | |
| 1607. |
The solid particles which are left on filter paper while filtration is called |
| A. | residue |
| B. | filtrate |
| C. | solvent |
| D. | solute |
| Answer» B. filtrate | |
| 1608. |
In clean air, the composition of oxygen by volume is |
| A. | 0.2095 |
| B. | 0.78 |
| C. | 0.009 |
| D. | 0.0003 |
| Answer» B. 0.78 | |
| 1609. |
The melting point of 'sodium' is |
| A. | 98 |
| B. | 101 |
| C. | -101 |
| D. | 801 |
| Answer» B. 101 | |
| 1610. |
When mixtures are formed there is no exchange of |
| A. | energy |
| B. | heat |
| C. | gases |
| D. | all of them |
| Answer» B. heat | |
| 1611. |
Mixtures may comprise |
| A. | element |
| B. | compounds |
| C. | solution |
| D. | both a and b |
| Answer» E. | |
| 1612. |
The gases in the air can be separated by process of |
| A. | distillation |
| B. | evaporation |
| C. | fractional distillation |
| D. | decomposition |
| Answer» D. decomposition | |
| 1613. |
A method which is used to separate, analyze or identify the different components in mixture such as food, dyes and inks is called |
| A. | chromatography |
| B. | combustion |
| C. | spectroscopy |
| D. | fractional distillation |
| Answer» B. combustion | |
| 1614. |
The condensed water collected in conical flask is called |
| A. | filtrate |
| B. | distillate |
| C. | solvent |
| D. | solute |
| Answer» C. solvent | |
| 1615. |
Perfume industry obtains fragrant oil from plants using technique |
| A. | reverse osmosis |
| B. | distillation |
| C. | filtration |
| D. | heating |
| Answer» C. filtration | |
| 1616. |
Mud particles cannot pass through |
| A. | filter paper |
| B. | gauze |
| C. | pipette |
| D. | burette |
| Answer» B. gauze | |
| 1617. |
Iron fillings can be separated from iron and sulphur mixture by |
| A. | heating |
| B. | filtration |
| C. | magnetic attraction |
| D. | |
| Answer» D. | |
| 1618. |
The constituents may combine in any portion by mass in |
| A. | element |
| B. | compound |
| C. | mixture |
| D. | reaction |
| Answer» D. reaction | |
| 1619. |
Mixing of metals with other metals or non-metals makes |
| A. | alloy |
| B. | metalloid |
| C. | alkali |
| D. | compound |
| Answer» B. metalloid | |
| 1620. |
Fire extinguishers are filled with a gas called |
| A. | carbon dioxide |
| B. | oxygen |
| C. | helium |
| D. | nitrogen |
| Answer» B. oxygen | |
| 1621. |
Galaxies that have not any formed shape are known as |
| A. | lenticular galaxies |
| B. | peculiar galaxies |
| C. | elliptical galaxies |
| D. | irregular galaxies |
| Answer» E. | |
| 1622. |
The cloud of gas and dust forms a |
| A. | disc |
| B. | ball |
| C. | galaxy |
| D. | cube |
| Answer» B. ball | |
| 1623. |
The radio waves are collected and changed in |
| A. | mechanical signals |
| B. | electrical signals |
| C. | chemical signals |
| D. | physical signals |
| Answer» C. chemical signals | |
| 1624. |
Our sun is situated in one of the spiral arms of the |
| A. | Whirlpool galaxy |
| B. | Black eye galaxy |
| C. | Andromeda galaxy |
| D. | Milky way galaxy |
| Answer» E. | |
| 1625. |
The gas will slowly disappear and be left only in the |
| A. | center of sun |
| B. | crust of sun |
| C. | mantle of sun |
| D. | sunspots |
| Answer» B. crust of sun | |
| 1626. |
'Ulysses' was expected to last only for |
| A. | 3 years |
| B. | 5 years |
| C. | 7 years |
| D. | 9 years |
| Answer» C. 7 years | |
| 1627. |
The 'Solar Dynamics Observatory' is a |
| A. | NASA mission |
| B. | Roscomsmos mission |
| C. | Turnkey project |
| D. | |
| Answer» C. Turnkey project | |
| 1628. |
Our 'solar system' belongs to |
| A. | oval shaped system |
| B. | circle shaped system |
| C. | spiral shaped system |
| D. | coil shaped system |
| Answer» D. coil shaped system | |
| 1629. |
'Spiral galaxies' were made by |
| A. | three ages of stars |
| B. | three kinds of stars |
| C. | three types of stars |
| D. | three sizes of stars |
| Answer» B. three kinds of stars | |
| 1630. |
The star "Betelgeuse" belongs to the constellation named |
| A. | Orion |
| B. | Canis Major |
| C. | Aquarius |
| D. | Taurus |
| Answer» B. Canis Major | |
| 1631. |
Small telescopes have lenses to make faraway objects look |
| A. | smaller |
| B. | brighter |
| C. | bigger |
| D. | colored |
| Answer» D. colored | |
| 1632. |
The view of space from earth keeps on changing because the earth is |
| A. | revolving |
| B. | at an angle of 25 Degree |
| C. | cold |
| D. | beneath the sun |
| Answer» B. at an angle of 25 Degree | |
| 1633. |
It takes many years for the light of stars to reach |
| A. | the sun |
| B. | the milky way |
| C. | our eyes |
| D. | the moon |
| Answer» D. the moon | |
| 1634. |
Finally, the sun will cool down and end its life as a cold, dark body called |
| A. | black moon |
| B. | white dwarf |
| C. | black dwarf |
| D. | white comet |
| Answer» D. white comet | |
| 1635. |
The brightness of a star depends not only on emission of light, but also on the |
| A. | size |
| B. | distance |
| C. | material |
| D. | hotness |
| Answer» C. material | |
| 1636. |
The eyepiece lens bends the light towards |
| A. | eyes |
| B. | eye filters |
| C. | eye effectors |
| D. | sharpness reducers |
| Answer» B. eye filters | |
| 1637. |
You can observe that the sun, moon and other planets seem to move through |
| A. | twelve constellations during a year |
| B. | six constellations during a year |
| C. | three constellations during a year |
| D. | one constellations during a year |
| Answer» B. six constellations during a year | |
| 1638. |
'SOHO' will study the |
| A. | inner core of the Sun |
| B. | outer layer of the Sun |
| C. | mantle of the sun |
| D. | crust of the sun |
| Answer» B. outer layer of the Sun | |
| 1639. |
The shape of elliptical galaxies is like a |
| A. | half egg |
| B. | flattened ball |
| C. | jellyfish |
| D. | sea shell |
| Answer» C. jellyfish | |
| 1640. |
The three shapes of the galaxies are |
| A. | spiral, regular and irregular |
| B. | spiral, elliptical and regular |
| C. | spiral, elliptical and irregular |
| D. | elliptical, regular and irregular |
| Answer» D. elliptical, regular and irregular | |
| 1641. |
'SOHO' will take the pictures and send them back to |
| A. | Moon |
| B. | Mars |
| C. | Earth |
| D. | Sun |
| Answer» D. Sun | |
| 1642. |
Without sun, the solar system would not |
| A. | exist |
| B. | rotate |
| C. | move |
| D. | maintain its temperature |
| Answer» B. rotate | |
| 1643. |
A compound which yields in black solid, copper oxide and colorless gas carbon dioxide on heating, is |
| A. | copper carbonate |
| B. | iron sulfide |
| C. | sodium chloride |
| D. | copper chloride |
| Answer» B. iron sulfide | |
| 1644. |
Air ships and balloons use gas called |
| A. | oxygen |
| B. | hydrogen |
| C. | helium |
| D. | neon |
| Answer» D. neon | |
| 1645. |
Low densities, low melting, low boiling point and poor conductivity are found in |
| A. | metals |
| B. | non metals |
| C. | alkalis |
| D. | metalloids |
| Answer» C. alkalis | |
| 1646. |
Chinese thought that the number of elements were |
| A. | 3 |
| B. | 4 |
| C. | 2 |
| D. | 5 |
| Answer» E. | |
| 1647. |
The process which involves in breaking down the element by passing electricity through it is called |
| A. | electrolysis |
| B. | hydrolysis |
| C. | photolysis |
| D. | photosynthesis |
| Answer» B. hydrolysis | |
| 1648. |
Wolfram is a chemical name of an element called |
| A. | iron |
| B. | magnesium |
| C. | sodium |
| D. | tungsten |
| Answer» E. | |
| 1649. |
Compounds may be broken down into simple substances by |
| A. | ordinary reaction |
| B. | chemical reaction |
| C. | physical reaction |
| D. | evaporation |
| Answer» C. physical reaction | |
| 1650. |
A ductile element which is a good conductor of electricity is called |
| A. | copper |
| B. | rubber |
| C. | glass |
| D. | sand |
| Answer» B. rubber | |