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.
| 951. |
When animals and plants are rotten in the absence of air, there produces a gas called |
| A. | oxygen |
| B. | carbon dioxide |
| C. | bio gas |
| D. | methane |
| Answer» D. methane | |
| 952. |
Trapped heat inside the earth is known as |
| A. | thermal energy |
| B. | geothermal energy |
| C. | heat energy |
| D. | volcano |
| Answer» C. heat energy | |
| 953. |
When air holes of a Bunsen burner are closed they give |
| A. | luminous flame |
| B. | non luminous flame |
| C. | aluminous flame |
| D. | dull flame |
| Answer» B. non luminous flame | |
| 954. |
When wind blows across seas and oceans, there are seen |
| A. | whirling |
| B. | waves |
| C. | surfs |
| D. | snails |
| Answer» C. surfs | |
| 955. |
1 kilo joule is equal to |
| A. | 100J |
| B. | 1000J |
| C. | 10J |
| D. | 0.1J |
| Answer» C. 10J | |
| 956. |
Bio gas is a renewable source of |
| A. | energy |
| B. | heat |
| C. | light |
| D. | fossil |
| Answer» B. heat | |
| 957. |
A moving car releases energy during process of burning |
| A. | petrol |
| B. | water |
| C. | diesel |
| D. | coal |
| Answer» B. water | |
| 958. |
Almost every resource of earth's energy can be traced back to |
| A. | sun |
| B. | moon |
| C. | earth |
| D. | plants |
| Answer» B. moon | |
| 959. |
For heating, the more suitable flame is |
| A. | luminous flame |
| B. | non luminous flame |
| C. | bright flame |
| D. | dull flame |
| Answer» C. bright flame | |
| 960. |
Solar cells and solar furnaces are |
| A. | cheap |
| B. | expensive |
| C. | free |
| D. | reasonable |
| Answer» C. free | |
| 961. |
A dangerous activity which results in many deaths due to gas explosion, caves in and flooding is |
| A. | coal mining |
| B. | climbing mountain |
| C. | extracting oil |
| D. | hydropower generation |
| Answer» B. climbing mountain | |
| 962. |
The energy in from of heat and light is obtained from |
| A. | sun |
| B. | tides |
| C. | biomass |
| D. | wind |
| Answer» B. tides | |
| 963. |
Fossils fuel comes from the remains of organisms which lived |
| A. | 100 years ago |
| B. | 10 years ago |
| C. | 1 year ago |
| D. | 5 years ago |
| Answer» B. 10 years ago | |
| 964. |
Fossils fuel which stores large amount of energy in a small volume is |
| A. | crude oil |
| B. | natural gas |
| C. | coal |
| D. | kerosene |
| Answer» B. natural gas | |
| 965. |
Modern wind turbines produce |
| A. | heat |
| B. | oil |
| C. | gas |
| D. | electricity |
| Answer» E. | |
| 966. |
Sun, wind, running water, tides, biomass, and geothermal resources are known as |
| A. | renewable |
| B. | non renewable |
| C. | reversible |
| D. | irreversible |
| Answer» B. non renewable | |
| 967. |
Green plants provide food for other |
| A. | plants |
| B. | living things |
| C. | non living things |
| D. | trees |
| Answer» C. non living things | |
| 968. |
The 'SI' unit for energy is |
| A. | watt |
| B. | joule |
| C. | newton |
| D. | kilogram |
| Answer» C. newton | |
| 969. |
Any substance which is being burnt to release energy is called |
| A. | fuel |
| B. | fossil |
| C. | crude |
| D. | unpurified |
| Answer» B. fossil | |
| 970. |
Food waste can be burnt to release |
| A. | heat |
| B. | gas |
| C. | light |
| D. | oil |
| Answer» B. gas | |
| 971. |
'Photovoltaic' cells are also termed as |
| A. | solar cells |
| B. | voltar cells |
| C. | battery cells |
| D. | rechargeable cells |
| Answer» B. voltar cells | |
| 972. |
Tiny organisms which lived in seas and oceans are called |
| A. | mosses |
| B. | algae |
| C. | plankton |
| D. | coral reef |
| Answer» D. coral reef | |
| 973. |
In parallel circuits, the voltage is |
| A. | equal |
| B. | unequal |
| C. | more powerful |
| D. | less powerful |
| Answer» B. unequal | |
| 974. |
Nichrome (mixture of nickel and chromium) resists |
| A. | less electricity than copper |
| B. | less electricity than aluminum |
| C. | more electricity than copper |
| D. | more electricity than aluminum |
| Answer» D. more electricity than aluminum | |
| 975. |
Adding more bulbs to a circuit with one battery would |
| A. | make them brighter |
| B. | make them sharper |
| C. | make them dimmer |
| D. | make them colorless |
| Answer» D. make them colorless | |
| 976. |
Semiconductors are also found in |
| A. | light emitting diodes |
| B. | liquid crystal displays |
| C. | cathode ray tubes |
| D. | cathode ray oscilloscopes |
| Answer» B. liquid crystal displays | |
| 977. |
Electroplating is used to coat less expensive metals with |
| A. | gold |
| B. | silver |
| C. | platinum |
| D. | valuable metals |
| Answer» E. | |
| 978. |
If a hair drier uses a current of 2A but we fit 1A fuse in it. The fuse will |
| A. | glow |
| B. | burst |
| C. | melt |
| D. | remain safe |
| Answer» D. remain safe | |
| 979. |
Overloading in power sockets can cause them to |
| A. | spark |
| B. | burst |
| C. | catch fire |
| D. | burn |
| Answer» D. burn | |
| 980. |
The negative electrode of the electrolytic cell is known as |
| A. | Cathode |
| B. | Anode |
| C. | Posit rode |
| D. | Nematode |
| Answer» B. Anode | |
| 981. |
A doorbell and electric bell use |
| A. | magnets |
| B. | current |
| C. | electromagnets |
| D. | resistors |
| Answer» D. resistors | |
| 982. |
Friction can cause transfer of |
| A. | neutrons |
| B. | protons |
| C. | electrons |
| D. | photons |
| Answer» D. photons | |
| 983. |
A block of impure copper is used as |
| A. | cathode |
| B. | anode |
| C. | posit rode |
| D. | nematode |
| Answer» C. posit rode | |
| 984. |
Electricity is required to |
| A. | light up homes |
| B. | clean your car |
| C. | flush the toilet |
| D. | change weather |
| Answer» B. clean your car | |
| 985. |
ELCB is an abbreviation of |
| A. | electrolytic circuit breaker |
| B. | earth locking circuit breaker |
| C. | earth leakage circuit breaker |
| D. | electric leakage circuit breaker |
| Answer» D. electric leakage circuit breaker | |
| 986. |
The magnetic field of the coil and the permanent magnet |
| A. | attract each other |
| B. | repel each other |
| C. | combine with each other |
| D. | stay with each other |
| Answer» C. combine with each other | |
| 987. |
To prevent overload and overheating of wires |
| A. | fuses are used |
| B. | circuit breakers are used |
| C. | fuses and circuit breakers are used |
| D. | fuses and resistor are used |
| Answer» D. fuses and resistor are used | |
| 988. |
The compounds made up of hydrogen and carbon are known as |
| A. | carbohydrates |
| B. | hydrocarbons |
| C. | alkanes |
| D. | alkenes |
| Answer» C. alkanes | |
| 989. |
The 'volume' of gases is |
| A. | indefinite |
| B. | definite |
| C. | dependent |
| D. | reduced |
| Answer» B. definite | |
| 990. |
The reaction that gives out heat, while taking place is known as |
| A. | exothermic reaction |
| B. | endothermic reaction |
| C. | reversible reaction |
| D. | substitution reaction |
| Answer» B. endothermic reaction | |
| 991. |
The reason of low density of gases is |
| A. | number of particles per unit area |
| B. | number of particles per unit volume |
| C. | mass per unit area |
| D. | mass per unit volume |
| Answer» C. mass per unit area | |
| 992. |
Nitrogen is obtained from |
| A. | gaseous air |
| B. | liquefied air |
| C. | solidified air |
| D. | air spaces in soil |
| Answer» C. solidified air | |
| 993. |
When photosynthesis is faster than the rate of respiration |
| A. | is also increased |
| B. | is decreased |
| C. | is reversed |
| D. | is remain unchanged |
| Answer» D. is remain unchanged | |
| 994. |
The movement of food in the phloem depends on |
| A. | living processes in phloem |
| B. | sieve plates of phloem |
| C. | companion cells of phloem |
| D. | dead cells of phloem |
| Answer» B. sieve plates of phloem | |
| 995. |
When temperature of the surroundings increases, the speed of transpiration is also |
| A. | increased |
| B. | decreased |
| C. | remained same |
| D. | remained unchanged |
| Answer» B. decreased | |
| 996. |
Xylem is a vessel in plants which takes |
| A. | food and minerals to leaves from roots |
| B. | food and minerals to roots from leaves |
| C. | prepared food to other parts from roots |
| D. | prepared food to other parts from leaves |
| Answer» B. food and minerals to roots from leaves | |
| 997. |
The flow of water and mineral salts from roots to leaves by xylem is known as |
| A. | translocation stream |
| B. | transpiration stream |
| C. | respiration stream |
| D. | photo stream |
| Answer» C. respiration stream | |
| 998. |
Ice flows down the mountainside like a slow moving rive is called |
| A. | ice cap |
| B. | snow river |
| C. | glacier |
| D. | snow peak |
| Answer» D. snow peak | |
| 999. |
In water cycle, sun helps water to |
| A. | get clean |
| B. | dry |
| C. | evaporate |
| D. | move in the direction of light |
| Answer» D. move in the direction of light | |
| 1000. |
Human's infected feces contains |
| A. | bacteria |
| B. | viruses |
| C. | snails |
| D. | worms |
| Answer» E. | |