Question Text
Question 1 :
If $$H^{+}$$ion concentration of a solution is increasedby $$10$$ times, its $$pH$$ will :<br>
Question 2 :
Four solutions A, B, C and D when tested with universal indicator showed pH as $$4, 11, 7$$ and $$9$$ respectively. Which one of the four solutions is neutral?<br/>
Question 4 :
Which colour appears when few drops of phenolphthalein put into test tube contains lime water?
Question 7 :
Aquaregia is prepared by mixing conc. $$HCl$$ and $$conc. HNO_3$$ in the ratio ________ 
Question 9 :
$$p{ K }_{ a }$$ values of four acids are given below at $${ 25 }^{ o }C$$. The strongest acid is:
Question 11 :
Assertion: pH of a neutral solution is always $$7$$.
Reason: pH of a solution does not depend upon temperature.
Question 12 :
The solution of bleaching powder in water is always a clear solution.<br/>
Question 15 :
The hydrogen ion concentration of the oceans is about $$2\times10^{-9}\space M$$. What is the $$pH$$?