MCQ
Combustion is:
- AExothermic reaction
- BEndothermic reaction
- CAddition reaction
- DNone of these
Explanation:
Combustion is an oxidation reaction and during this reaction, heat is produced.
In this type of reaction, bonds are broken first and then new bonds may be created results in new material formation.
So, it is always an exothermic reaction.
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$(a)\; C \;\;(b)\; O \;\;(c)\; F\;\; (d) \;Cl\;\; (e)\; Br$

$(a)$ $AgF$ is soluble and colourless is aqueous medium
$(b)$ For $LiF$ solubility and Melting point both are lower as compair to $NaF$
$(c)$ Solubility of $Rb_2SO_4$ is less as compair to $BaSO_4$
$(d)$ If $AgI$ is added to water colour of water will turned yellow from colourless