Name the substance which on treatment with chlorine yields bleaching powder.
$[Al_2O_3]$
$[CaO]$
$[Ca(OH)_2]$
$[CaOCO_3]$
Calcium hydroxide $[Ca(OH)_2]$, on treatment with chlorine, yields bleaching powder.
Fresh milk has a $pH$ of $6$. How do you think the $pH$ will change as it turns into curd ? Explain your answer.
Why does dry $HCl$ gas not change the colour of the dry litmus paper ?
What will happen if a solution of sodium hydrocarbonate is heated ? Give the equation of the reaction involved.
You have two solutions, $A$ and $B$. The $pH$ of solution $A$ is $6$ and $pH$ of solution $B$ is $8$. Which solution has more hydrogen ion concentration Which of this is acidic and which one is basic?
Do basic solutions also have $H^+_{(aq)}$ ions ? If yes, then why are these basic ?
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