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The answer to each of the following questions is a single digit integer, ranging from 0 to 9. If the correct answers to the qustion numbers 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 : The coefficient of H_(2)SO_(4) on balancing the equation K_(2)Cr_(2)O_(7) + H_(2)SO_(4) + KI rarrK_(2)SO_(4) + Cr_(2)(SO_(4))_(3) + H_(2)O+I_(2) is |
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Answer» Solution :The balanced EQUATION is`:` `K_(2)Cr_(2)O_(7) + 7H_(2)SO_(4) +6KI rarr 4K_(2)SO_(4)+ Cr_(2)(SO_(4))_(3)+ 3I_(2)+ 7H_(2)O` |
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