محلول اور حیاتی سالمات

A solution has 2 moles of A and 3 moles of B. What is the mole fraction of A?

• 1 0.4
• 2 0.6
• 3 0.67
• 4 2

Osmotic pressure of a dilute solution is directly proportional to its:

• 1 Concentration
• 2 Colour
• 3 Density only
• 4 Volume

Dissolving a non-volatile solute in a solvent causes the vapour pressure of the solvent to:

• 1 Increase
• 2 Decrease
• 3 Stay the same
• 4 Become zero

What mass of NaCl is in 500 mL of a 0.1 M solution? (Na = 23, Cl = 35.5)

• 1 5.85 g
• 2 2.925 g
• 3 0.585 g
• 4 29.25 g

Glucose is classified as:

• 1 A ketohexose
• 2 An aldohexose
• 3 A disaccharide
• 4 A polysaccharide

What colour does starch give with iodine solution?

• 1 Red
• 2 Blue-black
• 3 Green
• 4 Yellow

Fats are esters of fatty acids with:

• 1 Glycerol
• 2 Glucose
• 3 Ethanol
• 4 Glycine

An amino acid exists mainly as a dipolar ion in water. This ion is called a:

• 1 Zwitterion
• 2 Carbocation
• 3 Free radical
• 4 Carbanion