محلول اور حیاتی سالمات

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

• 1 2
• 2 0.67
• 3 0.4
• 4 0.6

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

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

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

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

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

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

Glucose is classified as:

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

What colour does starch give with iodine solution?

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

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 Free radical
• 3 Carbanion
• 4 Carbocation