In which of the following reactions ethylene is formed?
When SCN- is added to an aqueous solution of Fe(NO3)3, the complex ion produced is
Which of the following species participate in sulphonation of benzene ring?
The final produce 'C' in the above reaction is
Liquid benzene burns in oxygen according to 2C6H6(l) + 15O2(g)→ 12CO2(g) + 6H2O(g) . How many litres of oxygen are required for complete combustion of 39 gm of liquid C6H6 (At. wt.of C=12,O=16)
Volume of 1 mole of a gas at STP =22.4L
Volume of 15 mole of a gas at STP =22.4×15=336L
Molecular weight of benzene =78g
No. of moles of benzene in 39g of benzene =7839=0.5 mole
From the given reaction,
Volume of oxygen required to burn 2 mole of benzene =336L.
Volume of oxygen required to burn 0.5 mole of benzene =2336×0.5=84L
Hence 84 litres of O2 at STP are needed to complete the combustion of 39g of liquid benzene.