Q17 of 270 Page 79

Two solutions X and Y have pH = 4 and pH = 8, respectively. Which solution will give alkaline reaction and which one acidic?

Solution X will give acidic reaction as pH lies between 1-7.

Solution Y will give alkaline reaction as pH lies between 7-14.



More from this chapter

All 270 →
15 Two solutions A and B have pH values of 3.0 and 9.5 respectively. Which of these will tum litmus solution from blue to red and which will tum phenolphthalein from colourless to pink? 16 Two drinks P and Q gave acidic and alkaline reactions, respectively. One has a pH value of 9 and the other has a pH value of 3. Which drink has the pH value of 9? 18 Fill in the following blanks with suitable words:

(a) Acids have a pH.................than 7.


(b) Alkalis have a pH.............. than 7.


(c) Neutral substances have a pH of ...............


(d) The more acidic a solution, the ................... the pH.


(e) The more alkaline a solution, the.................... the pH.

 19 Fresh milk has a pH of 6. When it changes into curd (yogurt), will its pH value increase or decrease? Why?