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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.
| 1051. |
Two similar string instruments are |
| A. | piano and guitar |
| B. | piano and violin |
| C. | guitar and violin |
| D. | harp and piano |
| Answer» D. harp and piano | |
| 1052. |
If atom would have been enlarged to a football ground size, the nucleus would be the size of |
| A. | central spot |
| B. | D in front of the goal post |
| C. | half pitch |
| D. | goal post |
| Answer» B. D in front of the goal post | |
| 1053. |
Name of the important particles in an atom are |
| A. | protons, electrons and positrons |
| B. | neutrons, electrons and positrons |
| C. | protons, electron and photons |
| D. | protons, neutrons and electrons |
| Answer» E. | |
| 1054. |
The third shell can hold up to |
| A. | four electrons |
| B. | six electrons |
| C. | eight electrons |
| D. | twelve electrons |
| Answer» D. twelve electrons | |
| 1055. |
Nuclear energy is released all at once in |
| A. | nuclear plants |
| B. | nuclear explosions |
| C. | radioactive plants |
| D. | radioactive experiments |
| Answer» C. radioactive plants | |
| 1056. |
Third shell with third energy level is known as |
| A. | C shell |
| B. | M shell |
| C. | D shell |
| D. | 3rd shell |
| Answer» C. D shell | |
| 1057. |
The state of the compound being electrolyzed should be |
| A. | molten only |
| B. | aqueous only |
| C. | molten or aqueous |
| D. | gaseous |
| Answer» D. gaseous | |
| 1058. |
An example of insulator is |
| A. | silver |
| B. | potassium |
| C. | PVC |
| D. | titanium |
| Answer» D. titanium | |
| 1059. |
The scientist realized that the electric current produces |
| A. | sound |
| B. | current |
| C. | ions |
| D. | magnetism |
| Answer» E. | |
| 1060. |
For electrolysis to work, used compound should be a |
| A. | insulator |
| B. | conductor |
| C. | metalloid |
| D. | non conductor |
| Answer» C. metalloid | |
| 1061. |
The electricity which involves in attraction is known as |
| A. | static electricity |
| B. | current |
| C. | practical electricity |
| D. | magnetic electricity |
| Answer» B. current | |
| 1062. |
For security and military purpose, ammonia is used in |
| A. | explosives |
| B. | bullets |
| C. | flash bangs |
| D. | tear gas shells |
| Answer» B. bullets | |
| 1063. |
To separate the molecules of ethene dichloride, the compound is |
| A. | heated lightly |
| B. | heated gently |
| C. | heated strongly |
| D. | heated for a long time |
| Answer» D. heated for a long time | |
| 1064. |
Melting point of 'sulphur' is |
| A. | 113 °C |
| B. | 311 °C |
| C. | both |
| D. | none |
| Answer» C. both | |
| 1065. |
The change of shape of liquid according to the shape of container is due to |
| A. | space between particles |
| B. | collision of particles |
| C. | movement of particles |
| D. | force of attraction between particles |
| Answer» B. collision of particles | |
| 1066. |
When solids are heated, they |
| A. | expand more than liquids |
| B. | expand more than gases but less than liquids |
| C. | expand more than liquids but less than gases |
| D. | expand less than both liquids and gases |
| Answer» E. | |
| 1067. |
The diameter of the dish of the largest radio telescope is |
| A. | 105m |
| B. | 205m |
| C. | 305m |
| D. | 405m |
| Answer» D. 405m | |
| 1068. |
A group of twelve constellations is called |
| A. | Ursa |
| B. | Perseus |
| C. | Hercules |
| D. | Zodiac |
| Answer» E. | |
| 1069. |
The sun is too close to earth, this is why it looks |
| A. | yellow |
| B. | small |
| C. | large |
| D. | orange |
| Answer» D. orange | |
| 1070. |
Asteroids are rocky, airless worlds that orbit our sun but are too small to be called |
| A. | stars |
| B. | planets |
| C. | both a and b |
| D. | celestial bodies |
| Answer» C. both a and b | |
| 1071. |
In Hubble telescope a computer combines information provided by the separate |
| A. | aerials |
| B. | dishes |
| C. | radio waves |
| D. | wavelengths |
| Answer» C. radio waves | |
| 1072. |
If a '3kW' electric fire is used for 4 hours, the consumed units will be equal to |
| A. | 0.75 |
| B. | 12 |
| C. | 10 |
| D. | 8 |
| Answer» C. 10 | |
| 1073. |
The name of the scientist who discovered relationship between electricity and magnetism was |
| A. | Robert Hooke |
| B. | Nelson Green |
| C. | George Pascal |
| D. | Hans Oersted |
| Answer» E. | |
| 1074. |
Many main supply system uses |
| A. | 1 wire |
| B. | 2 wires |
| C. | 3 wires |
| D. | 5 wires |
| Answer» D. 5 wires | |
| 1075. |
A thin wire in the bulb made up of tungsten is known as |
| A. | cable |
| B. | terminal |
| C. | tungsten wire |
| D. | filament |
| Answer» E. | |
| 1076. |
Water is a poor electrolyte, so an acid is added to increase its conductivity. The acid is |
| A. | hydrochloric acid |
| B. | sulphuric acid |
| C. | nitric acid |
| D. | carbonic acid |
| Answer» C. nitric acid | |
| 1077. |
The contents in the root hair make |
| A. | cell membrane |
| B. | cell wall |
| C. | cell cap |
| D. | centrioles |
| Answer» D. centrioles | |
| 1078. |
The process by which food in leaves is prepared, is |
| A. | translocation |
| B. | transpiration |
| C. | respiration |
| D. | photosynthesis |
| Answer» E. | |
| 1079. |
Tiny holes in cell membrane are used |
| A. | to let molecules pass through |
| B. | to exchange gases |
| C. | to release extra water |
| D. | to excrete waste |
| Answer» B. to exchange gases | |
| 1080. |
The food transported in the form of a sugar is known as |
| A. | fructose |
| B. | glucose |
| C. | sucrose |
| D. | galactose |
| Answer» D. galactose | |
| 1081. |
Phloem tissue also contains |
| A. | component cells |
| B. | colleague cells |
| C. | companion cells |
| D. | supportive cells |
| Answer» D. supportive cells | |
| 1082. |
Natural gas is more efficient and produces less |
| A. | pollution |
| B. | heat |
| C. | reaction |
| D. | less evaporation |
| Answer» B. heat | |
| 1083. |
Power machines in factories and vehicles are examples of |
| A. | combustion |
| B. | thermal decomposition |
| C. | evaporation |
| D. | combination |
| Answer» B. thermal decomposition | |
| 1084. |
Natural gas is made up of compound |
| A. | carbon |
| B. | methane |
| C. | ethene |
| D. | ethane |
| Answer» C. ethene | |
| 1085. |
Zinc salt reacts with dilute shulphuric acid to form zinc salt and |
| A. | hydrogen |
| B. | oxygen |
| C. | carbon dioxide |
| D. | carbon monoxide |
| Answer» B. oxygen | |
| 1086. |
The process of breaking down of any substance into smaller substances by heating, is called |
| A. | decomposition |
| B. | evaporation |
| C. | thermal decomposition |
| D. | melting |
| Answer» D. melting | |
| 1087. |
Seeds are made by the process known as |
| A. | asexual reproduction |
| B. | sexual reproduction |
| C. | clone reproduction |
| D. | grafting |
| Answer» C. clone reproduction | |
| 1088. |
Some flowers are constructed so, when insect lands on them |
| A. | ovules stick at the wings of the insect |
| B. | pollens stick to the wings of the insect |
| C. | pollens fly by the wind formed by the movement of wings of insect |
| D. | ovaries burst to spread the ovules |
| Answer» C. pollens fly by the wind formed by the movement of wings of insect | |
| 1089. |
When animals eat fruits, the seeds are not digested due to |
| A. | hard coat on them |
| B. | indigestion |
| C. | lack of digestive juices |
| D. | digestive system |
| Answer» B. indigestion | |
| 1090. |
In sexual reproduction, a male cell joins a female cell and this joining of two opposite gender cells is called |
| A. | fertilization |
| B. | pollination |
| C. | oscillation |
| D. | reproduction |
| Answer» B. pollination | |
| 1091. |
The part of carpel where eggs are found is known as |
| A. | stigma |
| B. | style |
| C. | ovary |
| D. | ovule |
| Answer» D. ovule | |
| 1092. |
A largest occurring atom in the period table yet known is that of |
| A. | titanium |
| B. | platinum |
| C. | uranium |
| D. | plutonium |
| Answer» D. plutonium | |
| 1093. |
The radiation is released in a process known as |
| A. | radioactive explosion |
| B. | radio decay |
| C. | radioactive decay |
| D. | radiation release |
| Answer» D. radiation release | |
| 1094. |
The ionic chemical formula of hydrogen is |
| A. | H- |
| B. | H+ |
| C. | H- |
| D. | H+ |
| Answer» C. H- | |
| 1095. |
The shells are arranged around nucleus according to their |
| A. | size |
| B. | shape |
| C. | energy level |
| D. | mass |
| Answer» D. mass | |
| 1096. |
The two isotopes of carbon are |
| A. | carbon-11 and carbon-13 |
| B. | carbon-13 and carbon-15 |
| C. | carbon-6 and carbon-7 |
| D. | carbon-13 and carbon-14 |
| Answer» E. | |
| 1097. |
Some nuclear power plants use an artificial isotope instead of uranium. This isotope is known as |
| A. | Plutonium-239 |
| B. | Platinum-198 |
| C. | Einsteinium-252 |
| D. | Titanium-48 |
| Answer» B. Platinum-198 | |
| 1098. |
When "Uranium-238" is bombarded with neutrons, it produces |
| A. | heat |
| B. | electricity |
| C. | nuclear energy |
| D. | light |
| Answer» D. light | |
| 1099. |
The symbol of "Hydrogen" is |
| A. | H |
| B. | He |
| C. | Na |
| D. | Hy |
| Answer» B. He | |
| 1100. |
The positive ion is known as |
| A. | cation |
| B. | anion |
| C. | positron |
| D. | negatron |
| Answer» B. anion | |