HARDMCQ SINGLENEET ChemistryPhysical ChemistryRedox Reactions/Volumetric AnalysisAchiever Section
aK Cr O bKCl cH SO → xCrO Cl yKHSO zH O The above equation balances when
A.a = 2, b = 4, c = 6 and x = 2, y = 6, z = 3
B.a = 4, b = 2, c = 6 and x = 6, y = 2, z = 3
C.a = 6, b = 4, c = 2 and x = 6, y = 3, z = 2
D.a = 1, b = 4, c = 6 and x = 2, y = 6, z = 3✓ Correct
Explanation
The reaction is given as, 2 2 7 2 4 2 2 4 2 aK Cr O +bKCl+cH SO xCrO Cl +yKHSO +zH O → Let's first determine whether the reaction involves a change in the oxidation state or not. Write down oxidation states of all elements. 6 6 6 6 2 2 7 2 4 2 2 4 2 K Cr O +bKCl+cH S O x Cr O Cl +yKH S O +zH O → There is no change in the oxidation state .thus it is not a redox reaction. Let's write down the all possible values of atoms in the reaction in form of an equation as follows, Element Equation Equation number K 2a + b = y 1 Cr 2a = x 2 O 7a + 4c = 2x + 4y + z 3 Cl b = 2x 4 H 2c = y + 2z 5 On s
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