40. In which of the following arrangements the given sequence is not strictly according to the property indicated against it? (1) HF < HCI < HBr < HI : increasing acidic strength
(2) H20 < H2S < H2Se < H2Te : increasing pKa values
(3) NH3 < PH3 < AsH3 < SbH3 : increasing acidic character
(4) CO2 < SiO2 < SnO2 < PbO2 : increasing oxidising power​

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

answerspecific gravity;