Question Text
Question 1 :
Assertion: pH of a neutral solution is always $7$.
Reason: pH of a solution does not depend upon temperature.
Question 5 :
Which part of tooth, made up of calcium phosphate, is the hardest substance in the body?
Question 11 :
The acid present in the body of red ant is ________.<br/>
Question 12 :
Effervescence is seen when a bottle of soda water is opened.
Question 13 :
If tartaric acid is not added in baking powder, the cake will taste bitter due to te presence of -
Question 14 :
The hydrogen ion concentration of the oceans is about $2\times10^{-9}\space M$. What is the $pH$?
Question 15 :
When $NH_{3}(0.1\ M) 50\ ml$ mix with $HCl (0.1\ M)\ 10\ ml$ then what is $pH$ of resultant solution $(Pk_{b} = 4.75)$.
Question 16 :
Aquaregia is prepared by mixing conc. $HCl$ and $conc. HNO_3$ in the ratio ________ 
Question 19 :
The chloride salt of a certain weak monoacidic organic base is hydrolysed to an extent of $3$% in its $0.1M$ solution at ${25}^{o}C$. Given that the ionic product of water is ${10}^{-14}$ at this temperature, what is the dissociation constant of the base?
