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Q.1
The gas usually filled in the electric bulb is
Nitrogen
Hydrogen
Carbon dioxide
Oxygen
Q.2
Among the various allotrope of carbon
Coke is the hardest, graphite is the softest
Diamond is the hardest, coke is the softest
Diamond is the hardest, graphite is the softest
Diamond is the hardest, lamp black is the softest
Q.3
The tree which sends down roots from its branches to the soil is known as:
Oak
Pine
Banyan
Palm
Q.4
The property of a substance to absorb moisture from the air on exposure is called
Osmosis
Deliquescence
Efflorescence
Desiccation
Q.5
The two elements that are frequently used for making transistors are:
Boron and Aluminium
Silicon and Germanium
Iridium and Tungsten
Niobium and Columbium
Q.6
The variety of coal in which the deposit contains recognizable traces of the original plant material is
Bitumen
Anthracite
Lignite
Peat
Q.7
Washing soda is the common name for
Sodium Carbonate
Calcium Bicarbonate
Sodium Bicarbonate
Calcium Carbonate
Q.8
Electric bulb filament is made of
Copper
Aluminum
Lead
Tungsten
Q.9
Brass gets discoloured in air because of the presence of which of the following gases in air?
Oxygen
Hydrogen Sulphide
Carbon dioxide
Nitrogen
Q.10
Which of the following is a non metal that remains liquid at room temperature?
Phosphorous
Bromine
Chlorine
Helium
Q.11
Chlorophyll is a naturally occurring chelate compound in which central metal is
Copper
Magnesium
Iron
Calcium
Q.12
Newton is the unit of:
Force
Momentum
Acceleration due to gravity
Velocity
Q.13
Noise or Noise pollution measured in:
Phon
Deci
Decibel
Decimal
Q.14
Which layer protects earth from harmful rays of the Sun?
Ionosphere
Ozone layer
Troposphere
Magnetosphere
Q.15
Which one of the following is the petroleum wax?
Paraffin wax
Jonoba wax
Carnauba wax
Bees wax
Q.16
The vast resources of unutilised natural gas can be used in the production of
Graphite
Synthetic petroleum
Fertilisers
Carbide
Q.17
What are the soaps?
Salts of silicates
Mixture of glycerol and alcohols
Sodium or potassium salts of heavier fatty acids
Esters of heavy fatty acids
Q.18
How does common salt help in separating soap from the solution after saponification?
By decreasing density of Soap
By decreasing solubility of Soap
By increasing density of Soap
By increasing solubility of Soap
Q.19
Decibel is the unit used for:
Speed of light
Intensity of heat
Intensity of sound
Radio wave frequency
Q.20
Which is the absolute temperature scale?
Celsius
Fahrenheit
Kelvin
All of these
Q.21
What are metal bearing rocks called?
Bitumen
Bauxite
Metalloids
Ores
Q.22
What cause a moving body to resist a change in its state of motion?
Displacement
Acceleration
Inertia
Velocity
Q.23
BACK TO VILLAGES slogan was given by:
Lenin
Mao
Nehru
Patel
Q.24
Paper is manufactured by
Wood and resin
Wood, sodium and bleaching powder
Wood, calcium, hydrogen sulphide and resin.
Wood and bleaching powder
Q.25
Gypsum is added to cement clinker to
Increase the tensile strength of cement
Decrease the rate of setting of cement
Facilitate the formation of colloidal gel
Bind the particles of calcium silicate
Q.26
In vulcanisation, natural rubber is heated with
Carbon
Silicon
Sulphur
Phosphorous
Q.27
Deep blue colour is imparted to glass by the presence of
Cupric oxide
Nickel oxide
Cobalt oxide
Iron oxide
Q.28
The percentage of oxygen present in air is approximately-
44%
23%
40%
21%
Q.29
AIDS is caused by:
Bacteria
Fungus
Helminth
Virus
Q.30
Which of the following schemes is launched for the school going children:
Lok Jumbish
Mid day meal
Sarva Shiksha Abhiyan
Ayush
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