Embibe Experts Solutions for Chapter: Chemical Reactions and Equations, Exercise 1: Exercise

In the reaction, $\mathrm{M}\mathrm{n}{\mathrm{O}}_2+4\mathrm{H}\mathrm{Cl}\to \mathrm{M}\mathrm{n}\mathrm{C}{\mathrm{l}}_2+2{\mathrm{H}}_2\mathrm{O}+\mathrm{C}{\mathrm{l}}_2:$

The gases which can be used for storage of fresh sample of oil are:

What type of reaction is involved in the corrosion of iron? (Redox / Decomposition)

The given equation represents the reaction of sodium metal with water: 

Sodium $+$ Water $\to$ Sodium hydroxide $+$ Hydrogen 

Which of the following chemical equations represents a complete balanced chemical equation for the given word equation? 

Symbol $(\uparrow )$ is used to indicate:

In the equation:

$\mathrm{Cu}+{\mathrm{XHNO}}_3\to \mathrm{Cu}({\mathrm{NO}}_3{)}_2+{\mathrm{YNO}}_2+2{\mathrm{H}}_2\mathrm{O}$, the value of $\mathrm{X}$ and $\mathrm{Y}$ are

Why does milk become sour if kept for a long time? 

What is Tarnishing? Give an example.