Question : Which of the following substances has a pH value of about 14?

Option 1: Blood

Option 2: Sodium hydroxide

Option 3: Milk of magnesia

Option 4: Lemon Juice

Question : pH scale ranges from

Option 1: 0 - 7

Option 2: 8 - 14

Option 3: 0 - 14

Option 4: None

Question : The value of $\frac{1}{4-\sqrt{15}}-\frac{1}{\sqrt{15}-\sqrt{14}}+\frac{1}{\sqrt{14}-\sqrt{13}}-\frac{1}{\sqrt{13}-\sqrt{12}}+\frac{1}{\sqrt{12}-\sqrt{11}}-\frac{1}{\sqrt{11}-\sqrt{10}}+\frac{1}{\sqrt{10}-3}-\frac{1}{3-\sqrt{8}}$ is:

Option 1: $2-2 \sqrt{2}$

Option 2: $4+2 \sqrt{2}$

Option 3: $4-2 \sqrt{2}$

Option 4: $2+2 \sqrt{2}$

Question : What is" milk of magnesia chemically

Option 1: Magnesium carbonate

Option 2: Sodium bicarbonate

Option 3: Calcium hydroxide

Option 4: Magnesium hydroxide

Question : Find the sum of 6 + 8 + 10 + 12 + 14 .................. + 40.

Option 1: 414

Option 2: 424

Option 3: 1600

Option 4: 400