The fumes of NO2 are ________ in colour.
yellow
brown
pale yellow
red
B. brown
Pb + CuCl 2→ PbCl 2+ Cu. The given reaction is an example of a ________ reaction.
decomposition
double displacement
combination
displacement
D. displacement
How many Isomers does C 6H 14 have ?
3
6
4
5
D. 5