1.

The answer to each of the following questions is a single digit integer, ranging from 0 to 9 . If the correct answers to the questino number A,B,C and D (say) are 4,0,9 and 2 respectively,then the correct darkening of bubbles should be as shown on the side. If concentration of SO_(2) and O_(2) in the equilibrium reaction 2SO_(2)(g)+O_(2)(g) hArr 2SO_(3)(g) are quadrupled , the concentration of SO_(3) will now be ………………

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