In a gaseous reaction of the type
`aA+bBrarrcC+dD`, which is wrong:

In a gaseous reaction of the type aA+ b B to c C + dD, (i) In a gaseous reaction of the type (ii) a mole of A combines with b moles of B to give C and D (iii) (axxM_(A)) g of a combines with (b xxM_(B)) g of B to give C and D (iv) a molecules of A combines with b molecules of B to give C and D

For a general gaseous reaction of the type R to P , if the initial concentration of R is doubled, half life of the reaction is also doubled, the order of that reaction is

Fill in the blanks : For the gaseous reaction , a A + bB harr cC + dD, Delta n is equal to ………….