Action of hot and conc. on metallic tin produces:
In the electrolysis of alumina, cryolite is added to:
Which does not give flame test:
Among the following hydroxides, the one which has the lowest value of at ordinary temperature (about ) is:
Sodium thiosulphate is prepared by:
Zn and Cd do not show variable valency because:
Transition elements are coloured due to:
Butane nitrile can be prepared by heating:
A new C-C bond formation is possible in :
An alkene on reductive ozonolysis gives an aldehyde with formula and a ketone. The ketone is :
at ordinary temperature (about 
) is:
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