Statement I:
Conversion of blue copper sulphate to black cupric oxide on heating is a physical change.
Statement II:
A change in which chemical composition does not change is called physical change.
Both the statements are individually true and Statement II is the correct explanation of Statement I
Statement I is true but Statement II is false
Statement I is false but Statement II is true
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy