Question

d) phenacetin

1. which artificial sweetener is used by diabetic patients?

a) saccharin

b) glucose

c) fructose

d) maltose

1. detergents clean clothes better than soap in hard water because:

a) detergents are cheaper

b) detergents do not form scum with hard water

c) soaps are alkaline

d) detergents are acidic

1. which compound is used as an antacid to neutralize excess stomach acid?

a) nacl

b) naoh

c) mg(oh)₂

Explanation:

Question 3

Diabetic patients need sweeteners with low or no calorie and minimal impact on blood sugar. Saccharin is an artificial sweetener with no nutritional value and doesn't raise blood sugar. Glucose, fructose, and maltose are sugars that can affect blood sugar, so they aren't suitable for diabetics.

Hard water has calcium and magnesium ions. Soap reacts with these ions to form scum (insoluble precipitates), reducing its cleaning ability. Detergents don't form such scum with hard water ions, so they clean better. Cost, soap's alkalinity, or detergent's acidity aren't the main reasons for better cleaning in hard water.

Antacids neutralize excess stomach acid (HCl). NaCl is neutral, NaOH is a strong base (corrosive, not for stomach), and $\ce{Mg(OH)_{2}}$ is a weak base (magnesium hydroxide) that reacts with HCl to neutralize it, suitable as an antacid.

Answer:

a) Saccharin

Question 4