Answer : The equilibrium will shift in the left direction.
Explanation :
Le-Chatelier's principle : This principle states that if any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.
The given reaction is:

As per question, when we are adding  then the concentration of
  then the concentration of  is increased on product side then the equilibrium will shift in the direction where decrease of concentration of
 is increased on product side then the equilibrium will shift in the direction where decrease of concentration of  takes place. Therefore, the equilibrium will shift in the left direction.
 takes place. Therefore, the equilibrium will shift in the left direction.
Thus, the equilibrium will shift in the left direction.
 
        
             
        
        
        
B
Meniscusity the convex or concave upper surface of a column liquid, the curvature of which is caused by surface tension
        
                    
             
        
        
        
When it passes from one medium
        
             
        
        
        
Answer:
The advantage of the compound light microscope over the dissecting microscope is the magnification power of the telescope. Compound light microscope magnifies from 40x up to 1,000x while dissecting microscope magnifies up to 40 x only. In this regard, more magnification power is advantageous to view smaller objects.