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JEE Main levelOne or more correct optionsDifficulty 2 of 3sb196

Which of the following give carbon dioxide on heating to about 1200 K in an open vessel (carbon dioxide may be accompanied by other products)?

A $NaOH$
B $NaHCO X_{3}$
C $CaCO X_{3}$
D $Ca (HCO X_{3}) X_{2}$

Answer: B, C, D

2 NaHCO X_{3} Na X_{2} CO X_{3} + CO X_{2} + H X_{2} O

,

Ca (HCO X_{3}) X_{2} CaCO X_{3} + CO X_{2} + H X_{2} O

and

CaCO X_{3} CaO + CO X_{2}

all release

CO X_{2}

.

NaOH

contains no carbon.

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