Q.1
The gas usually filled in the electric bulb is
Q.2
Among the various allotrope of carbon
Q.3
The tree which sends down roots from its branches to the soil is known as:
Q.4
The property of a substance to absorb moisture from the air on exposure is called
Q.5
The two elements that are frequently used for making transistors are:
Q.6
The variety of coal in which the deposit contains recognizable traces of the original plant material is
Q.7
Washing soda is the common name for
Q.8
Electric bulb filament is made of
Q.9
Brass gets discoloured in air because of the presence of which of the following gases in air?
Q.10
Which of the following is a non metal that remains liquid at room temperature?
Q.11
Chlorophyll is a naturally occurring chelate compound in which central metal is
Q.12
Newton is the unit of:
Q.13
Noise or Noise pollution measured in:
Q.14
Which layer protects earth from harmful rays of the Sun?
Q.15
Which one of the following is the petroleum wax?
Q.16
The vast resources of unutilised natural gas can be used in the production of
Q.17
What are the soaps?
Q.18
How does common salt help in separating soap from the solution after saponification?
Q.19
Decibel is the unit used for:
Q.20
Which is the absolute temperature scale?
Q.21
What are metal bearing rocks called?
Q.22
What cause a moving body to resist a change in its state of motion?
Q.23
BACK TO VILLAGES slogan was given by:
Q.24
Paper is manufactured by
Q.25
Gypsum is added to cement clinker to
Q.26
In vulcanisation, natural rubber is heated with
Q.27
Deep blue colour is imparted to glass by the presence of
Q.28
The percentage of oxygen present in air is approximately-
Q.29
AIDS is caused by:
Q.30
Which of the following schemes is launched for the school going children:
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