As electronegativity difference increases, the degree of ionic character ? increases stays the same decreases

Option (a) is the correct answer.

Explanation:

When an element or atom has the ability to attract electrons towards itself then it is known that atom is electronegative in nature.

Therefore, two atoms with different electronegativity are combined together then there will be increase in electronegativity difference of the atoms.

For example, NaCl is an ionic compound.

This is because electronegative chlorine atom will attract the valence electron of sodium atom. Due to this there will be development of partial positive charge on the cation and partial negative charge on the anion. Hence, ionic character increases.

Therefore, we can conclude that as electronegativity difference increases, the degree of ionic character increases.

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