In a chemical reaction, the initial concentration of B was 1.5 times of the concentration of A, but the equilibrium concentrations of A and B were found to be equal. The equilibrium constant (K) for the aforesaid chemical reaction is -

5.1 g NH4SH is introduced in 3.0 L evacuated flask at 327ºC. 30% of the solid NH4SH decomposed to NH3 and H2S as gases . The Kp of the reaction at 327oC is (R = 0.082 L atm mol–1 K–1, Molar mass of S = 32 g mol–1 molar mass of N = 14 g mol–1)

The values of Kp/Kc for the following reactions at 300 K are, respectively : (At 300 K, RT = 24.62 dm3 atm mol–1) N2(g) + O2(g) $$\rightleftharpoons$$ 2 NO(g) N2O4(g) $$\rightleftharpoons$$ 2 NO(g) N2(g) + 3H2(g) $$\rightleftharpoons$$ 2 NH3(g)

Consider the following reversible chemical reactions : The relation between K1 and K2 is :

Two solids dissociate as follows – The total pressure when both the solids dissociated simultaneously is -

The compound that is NOT a common component of photochemical smog is :

The layer of atmosphere between 10 km to 50 km above the sea level is called as :

Assertion : Ozone is destroyed by CFCs in the upper stratosphere. Reason : Ozone holes increase the amount of UV radiation the earth.

Which is wrong with respect to our responsiblity as a human being to protect our environment?

The maximum prescribed concentration of copper in drinking water is :

Excessive release of CO2 into the atomosphere results in :

The regions of the atmosphere, where clouds form and where we live, respectively, are :

Air pollution that occurs in sunlight is :

The correct set of species responsible for the photochemical smog is :

The primary pollutant that leads to photochemical smog is :

The molecule that has minimum /no role in the formation of photochemical smog, is :

Taj Mahal is being slowly disfigured and discoloured. This is primarily due to :

The higher concentration of which gas in air can cause stiffness of flower buds?

Peroxyacetyl nitrate (PAN), an eye irritant is produced by :

The concentration of dissolved oxygen (DO) in cold water can go upto :