KVPY SA Exam 2016 Question Paper

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Question : 43 of 80

Marks: +1, -0

A redox reaction among the following is

$CdCl_2 + 2KOH → Cd (OH)_2 + 2KCl$
$BaCl_2 + K_2SO_4→BaSO_4 + 2KCl$
$CaCO_3 → CaO + CO_2$
$2 Ca + O_2 →2CaO$

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