Methylation of 10g of benzene gave 9.2g of toluene. Calculate the percentage yield of toluene ______(Nearest integer)

Methylation of 10g of benzene gives 9.2g of toulene, the % yield is:

In the above reaction, 3.9 g of benzene on nitration gives 4.92 g of nitrobenzene. The percentage yield of nitrobenzene in the above reaction is "_____________" %. (Round off to the Nearest Integer ). ( Given atomic mass : C : 12.0 u, H : 1.0 u, O : 16.0 u, N : 14.0 u )

1.0 g of a metal oxide gave 0.2 g of metal. Calculate the equivalent weight of the metal.

In the sulphur estimation. 0.471 g of an organic compound gave 1.44 g of barium sulfate. The percentage of sulphur in the compound is ___________ % . (Nearest integer) (Atomic Mass of Ba = 137 u)

In Carius method for estimation of halogens, 2 g of an organic compound gave 1.88 g of AgBr. The percentage of bromine in the compoun is __________.(Nearest integer) [Atomic mass : Ag=108,Br=80]