Tag: metals

Alkali metal $(A)$ is sodium ($Na$) which forms $NaOH$ (compound $B$) with water .The reaction can be written as:
$2Na + 2H _{2}O \rightarrow  2NaOH + H _{2}$
$NaOH$ reacts with aluminium oxide($ Al _{2}O _{3}$) to form sodium aluminate (compound $C$) with chemical formula $NaAlO _{2}$.The reaction can be written as:
$Al _{2}O _{3} + 2NaOH \rightarrow  2NaAlO _{2} + H _{2}O$

Sodium and magnesium metal reacts with the oxygen of the air at room temperature to form sodium oxide and magnesium oxide respectively. These oxides react with water to form hydroxides.
$4Na + O _2 \rightarrow 2Na _2O$
$Na _2O + H _2O \rightarrow 2NaOH$
$2Mg + O _2 \rightarrow 2MgO$
$MgO + H _2O \rightarrow Mg(OH) _2$

$Fe+2HCl\rightarrow Fe{ Cl } _{ 2 }+{ H } _{ 2\  }\\ x=2$

Zinc only when heated replaces hydrogen from steam thus forming oxides.

The condition produced by aerial oxidation of fats and oils in food, due to which unpleasant taste and smell occurs is called as rancidity.

The term used to indicate the development of unpleasant smell and taste in fat and oil containing foods due to aerial oxidation is rancidity.
The process of oxidizing fatty and oily substances is called as rancidity.

Rancidity is a very general term and in its most general meaning, it refers to the spoilage of a food in such a way that it becomes undesirable (and usually unsafe) for consumption.During the process of oxidative rancidity, oxygen molecules interact with the structure of the oil and damage its natural structure in a way that can change its odor, its taste, and its safety for consumption.

Glucose is used in oral rehydration therapy as it increases the uptake of water and sodium by the intestines.

Rancidity is the oxidation of oils and fats changing their taste and smell. Specifically, it is the hydrolysis and/or auto-oxidation of fats into short-chain aldehydes and ketones which are objectionable in taste and odour.