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.
| 151. |
The number of protons in a 'carbon' atom is |
| A. | 6 |
| B. | 11 |
| C. | 12 |
| D. | 10 |
| Answer» B. 11 | |
| 152. |
Chemical symbol represents |
| A. | chemical formula |
| B. | molecular formula |
| C. | structural formula |
| D. | atomic formula |
| Answer» B. molecular formula | |
| 153. |
Smaller particles in an atom are called |
| A. | atomic particles |
| B. | subatomic particles |
| C. | smaller particles |
| D. | neutral particles |
| Answer» C. smaller particles | |
| 154. |
Chloride ion has number of protons |
| A. | 17 |
| B. | 18 |
| C. | 24 |
| D. | 34 |
| Answer» B. 18 | |
| 155. |
In respiration, raw material is converted into |
| A. | water only |
| B. | carbon dioxide and energy |
| C. | water and energy |
| D. | water, carbon dioxide and energy |
| Answer» E. | |
| 156. |
The process of taking oxygen in is known as |
| A. | inhaling |
| B. | exhaling |
| C. | respiring |
| D. | synthesizing |
| Answer» B. exhaling | |
| 157. |
In respiration the raw products are |
| A. | oxygen and carbon |
| B. | oxygen and food |
| C. | oxygen and glucose |
| D. | food and carbon |
| Answer» D. food and carbon | |
| 158. |
When we inhale |
| A. | the diaphragm is pushed upwards and the rib cage downwards |
| B. | both diaphragm and rib cage are pushed downwards |
| C. | the diaphragm is pulled downwards and the rib cage upwards |
| D. | the diaphragm is pushed upwards and the rib cage is pulled downwards |
| Answer» D. the diaphragm is pushed upwards and the rib cage is pulled downwards | |
| 159. |
Asthma can get worse due to |
| A. | bacteria |
| B. | viruses |
| C. | insects |
| D. | dust |
| Answer» C. insects | |
| 160. |
An advance microscope which allows us to see tiny discreet articles in matter is called |
| A. | simple microscope |
| B. | compound microscope |
| C. | electron microscope |
| D. | scanning tunneling microscope |
| Answer» E. | |
| 161. |
The density of a substance is the total mass of a unit. It is called |
| A. | weight |
| B. | volume |
| C. | gravity |
| D. | force |
| Answer» C. gravity | |
| 162. |
Who suggested that atomos were eternal and could not be destroyed. |
| A. | Democritus |
| B. | Aristotle |
| C. | Robert brown |
| D. | Albert Einstein |
| Answer» B. Aristotle | |
| 163. |
The movement of particles from an area of higher concentration to an area of lower concentration is called |
| A. | osmosis |
| B. | diffusion |
| C. | Brownian motion |
| D. | parallel motion |
| Answer» C. Brownian motion | |
| 164. |
"Atomos" is a Greek word which means |
| A. | small |
| B. | indivisible |
| C. | invisible |
| D. | large |
| Answer» C. invisible | |
| 165. |
In concert halls, soft materials and carpets are used to |
| A. | increase sound waves |
| B. | absorb sound waves |
| C. | retract sound waves |
| D. | refract sound waves |
| Answer» C. retract sound waves | |
| 166. |
For communication astronauts use radio because |
| A. | sound travels at very high speed in vacuum |
| B. | sound does not travel in vacuum |
| C. | vacuum repels sounds |
| D. | sound energy turns into light in vacuum |
| Answer» C. vacuum repels sounds | |
| 167. |
Large empty room often sounds |
| A. | full |
| B. | hollow |
| C. | noisy |
| D. | repeating |
| Answer» C. noisy | |
| 168. |
Sounds of vehicles, aircrafts and machines are called |
| A. | artificial sounds |
| B. | natural sounds |
| C. | noise |
| D. | normal sounds |
| Answer» D. normal sounds | |
| 169. |
As compare to air, sound travels faster in |
| A. | liquids |
| B. | gases |
| C. | vacuum |
| D. | fluids |
| Answer» B. gases | |
| 170. |
A component which is used to close or break a circuit, is |
| A. | bulb |
| B. | switch |
| C. | wire |
| D. | electric cell |
| Answer» C. wire | |
| 171. |
Do not use appliances, if |
| A. | damaged |
| B. | wires exposed |
| C. | working properly |
| D. | both a and b |
| Answer» E. | |
| 172. |
If electric wires and appliances are overheated due to high voltage of electric current they can |
| A. | catch fire |
| B. | burn |
| C. | freeze |
| D. | both a and b |
| Answer» D. both a and b | |
| 173. |
The measure of rate of flow of electric charge through an electrical conductor is known as |
| A. | electric current |
| B. | electrical charge |
| C. | electric cell |
| D. | electric circuit |
| Answer» B. electrical charge | |
| 174. |
When electric charge moves through electrical conductor, there is a production of |
| A. | electric current |
| B. | electrical charge |
| C. | electric cell |
| D. | electric circuit |
| Answer» B. electrical charge | |
| 175. |
In a periodic table, the row of elements is called |
| A. | sets |
| B. | group |
| C. | column |
| D. | periods |
| Answer» E. | |
| 176. |
Stars are made up of two most abundant elements in universe namely |
| A. | hydrogen and helium |
| B. | oxygen and hydrogen |
| C. | hydrogen and carbon dioxide |
| D. | nitrogen and oxygen |
| Answer» B. oxygen and hydrogen | |
| 177. |
The number of natural elements is |
| A. | 116 |
| B. | 92 |
| C. | 140 |
| D. | 98 |
| Answer» C. 140 | |
| 178. |
The first most abundant element found in universe is |
| A. | hydrogen |
| B. | oxygen |
| C. | nitrogen |
| D. | helium |
| Answer» B. oxygen | |
| 179. |
Element which is non metal and is found on right side of periodic table is |
| A. | argon |
| B. | sodium |
| C. | neon |
| D. | both a and b |
| Answer» B. sodium | |
| 180. |
The solubility of gases increases with the decrease of |
| A. | mass |
| B. | volume |
| C. | temperature |
| D. | pressure |
| Answer» D. pressure | |
| 181. |
The more accurate and quick measure of "pH" value is given by |
| A. | indicator |
| B. | pH scale |
| C. | pH meter |
| D. | universal indicator |
| Answer» D. universal indicator | |
| 182. |
'Aqueous' solution includes |
| A. | salt solution |
| B. | sugar solution |
| C. | mineral water |
| D. | all of them |
| Answer» E. | |
| 183. |
'Lactic acid' is present in |
| A. | yogurt |
| B. | lemon |
| C. | apple |
| D. | guava |
| Answer» B. lemon | |
| 184. |
If carbon dioxide is passed through limewater it will form |
| A. | white precipitate |
| B. | white smoke |
| C. | acid rain |
| D. | blue flame |
| Answer» B. white smoke | |
| 185. |
When light travels through a transparent object, it |
| A. | reflects |
| B. | refracts |
| C. | speeds up |
| D. | changes color |
| Answer» C. speeds up | |
| 186. |
An example of luminous objects is |
| A. | Moon |
| B. | Earth |
| C. | Sun |
| D. | Wall |
| Answer» D. Wall | |
| 187. |
Diverging means to |
| A. | spread out |
| B. | invert |
| C. | bring together |
| D. | magnify |
| Answer» B. invert | |
| 188. |
The lenses work due to the |
| A. | reflection of light |
| B. | refraction of light |
| C. | rarefaction of light |
| D. | all of them |
| Answer» C. rarefaction of light | |
| 189. |
When light enters water from air, its speed decreases to |
| A. | 20,000 km/s |
| B. | 25,000 km/s |
| C. | 200,000 km/s |
| D. | 250,000 km/s |
| Answer» E. | |
| 190. |
Polyethene is used to make |
| A. | furniture |
| B. | cooking utensils |
| C. | plastic bags |
| D. | decorative items |
| Answer» D. decorative items | |
| 191. |
Chemical reactions are |
| A. | reversible |
| B. | irreversible |
| C. | permanent |
| D. | temporary |
| Answer» C. permanent | |
| 192. |
In chemical reactions, energy is absorbed or released in the form of |
| A. | sound |
| B. | light |
| C. | electricity |
| D. | heat |
| Answer» E. | |
| 193. |
Plastics are made up of |
| A. | small molecules |
| B. | small atoms |
| C. | large atoms |
| D. | large molecules |
| Answer» E. | |
| 194. |
The least kinetic energy is found in |
| A. | solids only |
| B. | liquids only |
| C. | gases only |
| D. | metals only |
| Answer» B. liquids only | |
| 195. |
Although Sirius looks like one bright star but actually it is |
| A. | a galaxy |
| B. | a comet |
| C. | a cluster |
| D. | a pair of two stars |
| Answer» E. | |
| 196. |
Space is getting bigger and galaxies are |
| A. | coming closer |
| B. | moving apart |
| C. | expanding as well |
| D. | shrinking instead of expanding |
| Answer» C. expanding as well | |
| 197. |
The stars we see are just a small proportion of |
| A. | space |
| B. | galaxy |
| C. | solar system |
| D. | planets |
| Answer» B. galaxy | |
| 198. |
Fortunately, we can study stars by |
| A. | angles |
| B. | radiations |
| C. | position |
| D. | starlight |
| Answer» E. | |
| 199. |
In clear night we can count approximately |
| A. | 1000 stars |
| B. | 100 stars |
| C. | 2000 stars |
| D. | 200 stars |
| Answer» D. 200 stars | |
| 200. |
Astrology was developed in order to predict how constellations would affect the |
| A. | sky |
| B. | galaxies |
| C. | human behavior |
| D. | myths |
| Answer» D. myths | |