1. ethers show :

a) functional group isomerism
b) metamerism
c) positional isomerism
d) tautomerism

2. potassium dichromates and sulphuric acid generates:

a) oxygen
b) hydrogen
c) nascent oxygen
d) nascent hydrogen

3. which of the following will not form yellow precipitates on heating will alkaline solution of iodine:

a) 2-butanol
b) methanol
c) ethanol
d) iso propyl alcohol

1.(a

2.(d

3.b

Explanation:

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml