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WorksheetsChemistry revision test
Total questions: 15
Worksheet time: 8mins
How to prevent rusting on an iron gate?
By washing it with wet cloth.
By oiling or painting the gate.
By covering it with a cloth
Mohair is obtained from ________________.
Boer goat
Angora goat
Kashmiri goat
Saneen goat
When thing reacts with ozygen, it undergoes in contact of oxygen and this process is called________________.
Crystallisation
Saturation
Oxidation
Galvanisation
Which following metal do not rust?
Iron
Steel
Gold
Silver
Rusting can so be prevented by this process to make a stainless steel. This process is (a)
(Write in capital letters)
Different colours are used in wool. This is so because-
To differentiate
To enhance knowledge knowledge of colours
That denotes different animals
All of these
Correct life cycle of a silk moth is :-
Eggs < developing moth < silkworm < cocoon
Eggs < cocoon < silkworm < developing moth
Eggs < silkworm < cocoon < developing moth
Eggs < cocoon < devloping moth < silkworm
__________ is the process for obtaining silk worms when they are reared and silk worms are spinned into silk fibres.
Processing silk
Sericulture
Agriculture
Dyeing
All portable toilets are called __________ toilets
Septic
Chemical
Compost
Formula for IRON OXIDE is
MgO
Fe3o2
Fe2o3
H2o
Full form of WWTP is :-
Water with treating plastic
Waste water treatment plant.
Water with treating purifier
Magnesium oxide( MgO) + Water(H2O) = Magnesium hydroxide( ? )
Mg(OH2)
Mg(h2O)
Mg(o2OH2)
A toilet where human excreta is treated by earthworms is also tested in INDIA.
True
False
This is an image of :-
Sewerage system
Onsite Sewage disposal system
Sewers
Sewage
Which of following are wool producers
Sheep
Goat
Yak
All of these
