First slide

Alkali metals

Question

Which of the following equations is correct?

Moderate

A

${LiNO}_{3} \overset{heat}{⟶} {LiO}_{2} + {NO}_{2} + O_{2}$
B

$2 NaOH \overset{R . T}{\to} {Na}_{2} O + H_{2} O$
C

. $2 HCOOK + O_{2} ⟶ K_{2} {CO}_{3} + H_{2} O + {CO}_{2}$
D

$2 {KBrO}_{3} + 3 C ⟶ 2 KBr + 3 CO$

Solution

lithium nitrate decomposes to reddish brown gas and colorless gas
sodium hydroxide do not decompose

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