Complete the table writing the effect of change in concentration in the system at equilibrium.
Action Change of concentration Change in rate
$∙$ More hydrogen is added $∙$ Increase the concentration of reactant. $∙$ Rate the forward reaction increases.
$∙$ More ammonia is added $∙$ Increase the concentration of product. $∙$ ..............
$∙$ Ammonia is removed $∙$ Decrease the concentration of product. $∙$ ..............
$∙$ More nitrogen is added $∙$ Increase the concentration of reactant. $∙$ ................

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Solution

Action Change of concentration Change in rate
$∙$ More hydrogen is added $∙$ Increase the concentration of reactant. $∙$ Rate of forward reaction increases.
$∙$ More ammonia is added $∙$ Increase the concentration of product. $∙$ Rate of Backward reaction increases.
$∙$ Ammonia is removed $∙$ Decrease the concentration of product. $∙$ Rate of forward reaction increases.
$∙$ More nitrogen is added $∙$ Increase the concentration of reactant. $∙$ Rate of forward reaction increases.

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Q. Assertion :The rate of reaction decreases with a decrease of concentration and increase with an increase of the concentration of reactants. Reason: The rate of reaction is directly proportional to the concentration of reactants.

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Action	Change of concentration	Change in rate
$∙$ More hydrogen is added	$∙$ Increase the concentration of reactant.	$∙$ Rate the forward reaction increases.
$∙$ More ammonia is added	$∙$ Increase the concentration of product.	$∙$ ..............
$∙$ Ammonia is removed	$∙$ Decrease the concentration of product.	$∙$ ..............
$∙$ More nitrogen is added	$∙$ Increase the concentration of reactant.	$∙$ ................