
Revision -Grade 10
Quiz by REENA GOYAL
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Whenhydrogen sulphide gas is passed through a blue solution of copper sulphate, ablack precipitate of copper sulphide is obtained and the sulphuric acid soformed remains in the solution. The reaction is an example of-
Â
(a)Â a combinationreaction
(b)Â a displacementreaction
(c)Â Â a decompositionreaction
(d)Â a doubledisplacement reaction
Thereaction of water and quick lime is an example of
(a)Â combinationreaction
(b)Â exothermicreaction
(c)Â Â both (a) and (b)
(d)Â None of these
Whenferrous sulphate is heated strongly name the gas evolved?
(a)Â SO2
(b)Â SO3
(c)Â Â Fe2O3
(d)Â SO2and SO3
Thecolour of the gas evolved on heating solid lead nitrate is
(a)Â Yellow
(b)Â Brown
(c)Â Â greenish yellow
(d)Â green
Astudent took solid quick lime in a china dish and added a small amount ofwater. He heard
(a)Â a popping sound
(b)Â a cracklingsound
(c)Â Â a hissing sound
(d)Â no sound at all