Which of the following is NOT a decomposition reaction?
a NH4NO2 (s) + N2(g) + H2O(1)
b
H2O2(aq) + H2O(l) + O2(g)
C KCl(s) → K(s) + Cl2(g)
d Al(s) + HCl(aq) + AICI: (aq) + H2(g)

Al + HCl   →   AlCl₃  + H₂

Its single displacement reaction.

Explanation:

Chemical equation:

2NH₄NO₃  →  2N₂ + 4H₂O + O₂

It is the decomposition reaction in which ammonium nitrate decompose to give nitrogen , water and oxygen.

Chemical equation:

2H₂O₂  →  2H₂O + O₂

It is the decomposition reaction in which hydrogen peroxide decompose to give water and oxygen.

Chemical equation:

2KCl    →   2K + Cl₂

It is the decomposition reaction in which potassium chloride decompose to give its constituent elements potassium and chlorine.

Chemical equation:

2Al +6 HCl   →   2AlCl₃  +3 H₂

This is single replacement reaction in which aluminium react with HCl and form aluminium chloride and hydrogen.

answer; economic order quantity;

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