How do i do this question please help me

3

Explanation:

The reaction is given as:

           H₂S   +   O₂   →  SO₂    +    H₂O

Let us balance the chemical equation.

 We take some letters and we use them as the coefficient to balance the equation;

          aH₂S   +   bO₂   →  cSO₂    +    dH₂O

Now,

  Conserving H;

         2a  = 2d

 Conserving S;

         a = c

 Conserving O;

        2b  = 2c + d  

Let a  = 1, d  = 1, c  = 1, b  =  and multiply through by 2;

    a = 2, b  = 3, c  = 2 and d = 2

So, the balanced reaction equation is given as;

    2H₂S   +   3O₂   →  2SO₂    +    2H₂O

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.