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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.
| 1101. |
The number of types of cells in retina is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» B. 3 | |
| 1102. |
If a ray of light enters water at an angle of 40 degree, it will be |
| A. | refracted |
| B. | reflected |
| C. | internally reflected |
| D. | distributed |
| Answer» C. internally reflected | |
| 1103. |
The colors known as primary colors are |
| A. | red and green |
| B. | red, yellow and green |
| C. | red, blue and orange |
| D. | red, green and blue |
| Answer» E. | |
| 1104. |
The name given to a change in speed of light is known as |
| A. | reflection |
| B. | critical change |
| C. | refraction |
| D. | diffraction of light |
| Answer» D. diffraction of light | |
| 1105. |
Rainbow is believed to be |
| A. | spherical |
| B. | full circle |
| C. | hot plasma |
| D. | all of above |
| Answer» E. | |
| 1106. |
The valency of aluminum is |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 1107. |
The valency of carbon is |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 1108. |
The valency of magnesium is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 1109. |
The smallest particle of carbon dioxide consists of |
| A. | two atoms |
| B. | three atoms |
| C. | four atoms |
| D. | five atoms |
| Answer» C. four atoms | |
| 1110. |
The bond which comes to existence due to sharing of electrons is known as |
| A. | ionic bonding |
| B. | covalent bonding |
| C. | metallic bonding |
| D. | dative bonding |
| Answer» C. metallic bonding | |
| 1111. |
Echoes are useful for bats because through it bats can detect |
| A. | size of the object |
| B. | position of the object |
| C. | size and position both |
| D. | state of the object |
| Answer» D. state of the object | |
| 1112. |
Sound travels faster in liquids than air because |
| A. | liquid is more dense |
| B. | the particles in liquid are close |
| C. | the particles in liquids have less energy |
| D. | the particles in liquids collide less as compare to particles in air |
| Answer» C. the particles in liquids have less energy | |
| 1113. |
The number of sound waves sent per second is known as |
| A. | wave front |
| B. | wavelength |
| C. | frequency |
| D. | amplitude |
| Answer» D. amplitude | |
| 1114. |
An example of 'percussion' is |
| A. | drum |
| B. | piano |
| C. | saxophone |
| D. | violin |
| Answer» B. piano | |
| 1115. |
In water the speed of sound is |
| A. | 100 m/s |
| B. | 200 m/s |
| C. | 1500 m/s |
| D. | 2000 m/s |
| Answer» D. 2000 m/s | |
| 1116. |
Polyvinyl chloride is a |
| A. | metal |
| B. | plastic |
| C. | metalloid |
| D. | gas |
| Answer» C. metalloid | |
| 1117. |
John Hyatt's invention was about |
| A. | cellulose in wood |
| B. | soil particles under plant roots |
| C. | plant stem |
| D. | barks of wood |
| Answer» B. soil particles under plant roots | |
| 1118. |
Large and long molecules made by the linkage of small molecules are known as |
| A. | polyesters |
| B. | polymers |
| C. | polypeptides |
| D. | polysomerism |
| Answer» C. polypeptides | |
| 1119. |
The reaction in which heat is taken while taking place, is known as |
| A. | exothermic reaction |
| B. | endothermic reaction |
| C. | reversible reaction |
| D. | substitutive reaction |
| Answer» C. reversible reaction | |
| 1120. |
The shape of solid is |
| A. | changeable |
| B. | definite |
| C. | irregular |
| D. | regular |
| Answer» C. irregular | |
| 1121. |
The angle of incidence when it meets the next boundary while leaving the object, is |
| A. | greater than zero |
| B. | equal to zero |
| C. | less than zero |
| D. | perpendicular to the surface of object |
| Answer» C. less than zero | |
| 1122. |
Scientist proved that it is possible to |
| A. | split dispersed lights further |
| B. | merge lights to form a white light again |
| C. | emerge lights to form more colors |
| D. | to combine random lights to form colors |
| Answer» C. emerge lights to form more colors | |
| 1123. |
Overlapping of two primary colors forms a |
| A. | tertiary color |
| B. | mixed color |
| C. | secondary color |
| D. | both a and b |
| Answer» D. both a and b | |
| 1124. |
The angle at which all refraction of light stops is known as |
| A. | critical angle |
| B. | angle of incidence |
| C. | angle of reflection |
| D. | angle of refraction |
| Answer» B. angle of incidence | |
| 1125. |
Light is a form of |
| A. | heat |
| B. | power |
| C. | energy |
| D. | force |
| Answer» D. force | |
| 1126. |
Grapes contain |
| A. | ethanoic acid |
| B. | acetic acid |
| C. | citric acid |
| D. | tartaric acid |
| Answer» E. | |
| 1127. |
Alkalis are really good conductors of |
| A. | electricity |
| B. | heat |
| C. | electrolytes |
| D. | magnetism |
| Answer» B. heat | |
| 1128. |
Another name of 'lime' is |
| A. | caustic soda |
| B. | calcium dioxide |
| C. | milk of magnesia |
| D. | calcium oxide |
| Answer» E. | |
| 1129. |
Best glue always dissolves in |
| A. | alcohol |
| B. | turpentine |
| C. | water |
| D. | acetone |
| Answer» E. | |
| 1130. |
In manufacturing of food, drinks, textiles, soaps and detergents raw material is |
| A. | water |
| B. | crops |
| C. | soil |
| D. | oxygen |
| Answer» B. crops | |
| 1131. |
Rapid backward and forward movements are known as |
| A. | disturbance |
| B. | noise |
| C. | vibration |
| D. | sound |
| Answer» D. sound | |
| 1132. |
A reflected sound is known as |
| A. | reflection of sound |
| B. | rarefaction |
| C. | refraction of sound |
| D. | echo |
| Answer» E. | |
| 1133. |
Bats produce sounds with |
| A. | long bursts with low frequency |
| B. | long bursts with high frequency |
| C. | short bursts with low frequency |
| D. | short bursts with high frequency |
| Answer» E. | |
| 1134. |
The depth of the sea or ocean is calculated by a |
| A. | machine |
| B. | microchip |
| C. | special fish |
| D. | special detector |
| Answer» C. special fish | |
| 1135. |
The sound of a whistle is |
| A. | low pitched |
| B. | high pitched |
| C. | low pitched with short wavelengths |
| D. | high pitched with long wavelengths |
| Answer» C. low pitched with short wavelengths | |
| 1136. |
Planets, moons, asteroids and stars are called |
| A. | celestial bodies |
| B. | heavenly bodies |
| C. | natural bodies |
| D. | space objects |
| Answer» B. heavenly bodies | |
| 1137. |
After sun, the nearest star to earth is called |
| A. | Proxima centauri |
| B. | Little dipper |
| C. | Polaris |
| D. | North star |
| Answer» B. Little dipper | |
| 1138. |
The time which earth takes to complete its one revolution is |
| A. | 365 1/4 days |
| B. | 365 days |
| C. | 28 days |
| D. | 29 days |
| Answer» B. 365 days | |
| 1139. |
The shape of the 'moon' is |
| A. | circle |
| B. | oval |
| C. | spherical |
| D. | conical |
| Answer» D. conical | |
| 1140. |
The time which sunlight takes to reach the earth is |
| A. | an hour |
| B. | 30 minutes |
| C. | 20 minutes |
| D. | 8 minutes |
| Answer» E. | |
| 1141. |
'Platelets' are made in |
| A. | liver |
| B. | bone marrow |
| C. | spleen |
| D. | blood |
| Answer» C. spleen | |
| 1142. |
The liquid in our body that contains 'hemoglobin' is called |
| A. | blood |
| B. | plasma |
| C. | semen |
| D. | vascular Juice |
| Answer» B. plasma | |
| 1143. |
The lower two chambers of a heart are known as |
| A. | atria |
| B. | ventricles |
| C. | upper chambers |
| D. | lower chambers |
| Answer» C. upper chambers | |
| 1144. |
The part of the hand that should not be used while checking someone else's pulse is |
| A. | index finger |
| B. | pinky finger |
| C. | central finger |
| D. | thumb |
| Answer» E. | |
| 1145. |
The biggest artery in a human body is known as |
| A. | aorta |
| B. | principal artery |
| C. | main red vessel |
| D. | major artery |
| Answer» B. principal artery | |
| 1146. |
To control electric current in a circuit, there is used a |
| A. | resistor |
| B. | insulator |
| C. | conductor |
| D. | wire |
| Answer» B. insulator | |
| 1147. |
A circuit which connects an electric source to its components, one after another to form a single loop is |
| A. | series circuit |
| B. | parallel circuit |
| C. | open circuit |
| D. | close circuit |
| Answer» B. parallel circuit | |
| 1148. |
The source of energy involves |
| A. | electric cell |
| B. | battery |
| C. | switches |
| D. | both a and b |
| Answer» D. both a and b | |
| 1149. |
Luigi Galvani discovered the effect of electricity on the legs of |
| A. | lizard |
| B. | frog |
| C. | human |
| D. | horse |
| Answer» C. human | |
| 1150. |
The SI unit for electric current is |
| A. | joule |
| B. | watt |
| C. | volt |
| D. | ampere |
| Answer» E. | |