Assertion : Entropy is always constant for a closed system.
Reason : Closed system is always reversible.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
The compound which does not exist as hydrate form
ferrous sulphate
copper sulphate
magnesium sulphate
sodium chloride
The wrong statement about fullerene is
it has 5-membered carbon ring
it has 6-membered carbon ring
it has sp2 hybridization
it has 5-membered rings more than 6-membered rings
When KMnO4 reacts with KBr in alkaline medium gives bromate ion. Then oxidation state of Mn changes from +7 to
+6
+4
+3
+2
How much amount of CuSO4.5H2O is required for liberation of 2.54 g of I2 when titrated with KI?
2.5 gm
4.99 gm
2.4 gm
1.2 gm
Decreasing order of nucleophilicity is
OH- > NH > CH3O- > RNH2
NH > OH- > CH3O- > RNH2
NH > CH3O- > OH- > RNH2
CH3O- > NH > OH- > RNH2
C.
NH > CH3O- > OH- > RNH2
If nucleophilic atoms are in the same row of periodic table, nucleophilicity is approximately in order of basicicty. Therefore, the correct order is NH > CH3O- > OH- > RNH2.