STD VIII - Science (III)

Name
Class
ITS ID
Which force will act between two charged objects?
Gravitational force
Electrostatic force
Frictional force
Muscular force
The dark zone of a candle flame is the ________.
Region around the wick
Base clock to wick
Middle region of flame
Outer region of flame
Incompletely burnt fuel releases a very poisonous gas that can be fatal if inhaled is __________.
Carbon dioxide
Ozone
Carbon monoxide
Water gas
Deoxyribonucleic acid is found to be present within _________.
Endoplasmic reticulum
Nucleus
Lysosome
Ribosome
The process by which mature ovum is released from ovary is called _______.
Oogenesis
Oogamy
Fertilisation
Ovulation
Which of the following is/are metalloid?
Silicon
Iodine
Both (a) and (b)
D) Gallium
Which of the following is/are noble gas?
Hydrogen
Argon
Neon
Both (b) and (c)
A reaction in which more reactive metal replaces a less reactive metal from its salt solution is called __________.
Addition reaction
Double displacement reaction
Exothermic reaction
Displacement reaction
When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to __________.
Pressure of water
Gravity of the earth
Shape of rubber bulb
Atmospheric pressure
The unit of calorific value is __________.
Joule
Joule/Kilogram
Kilojoule/Kg
None of these
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