Answer:
1. tributary 2. watersheds 3. divideThis is the correct answer according to E D G E N U I T Y 2020
Explanation:
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The concentration of
in the stack gas = 12 ppmv
That means 12 L of
is present per 
The given temperature is 273 K (0 C) and pressure is 1 atm. At these conditions, 1 mol of gas would occupy,


V = 22.4 L
1 mol
occupies 22.4 L
Moles of
= 
Mass of
=
=
μg
Converting
:
= 
Calculating the concentration in μg/
:

Correct Answer: CH2CCI2 and CH2CH2.
Reason:
Structure of compound depends on the hybridization of central atom. In both of the above molecules (i.e. CH2CCL2 and CH2CH2). Central atom i.e. carbon is
sp^2 hybridized. Thus 3 hybridized orbitals of 'C' is involved in sigma bonding. Further, these orbitals are placed spatially at an angle of

. The un-hybridized 2pz orbital of 'C' is involved in pi-bonding. Due to this, both of the above molecules possess a
triangular planner geometry.