One atomic mass is equal to

• $1.66 \times {10}^{-27} \mathrm{g}$

• $1.66 \times {10}^{-24} \mathrm{g}$

• $1.66 \times {10}^{-23} \mathrm{g}$

• $1.66 \times {10}^{25} \mathrm{g}$

1 u (amu) is equal to

• 1.492 × 10^-10 J

• 1.492 × 10^-7 J

• 1.492 × 10^-13 J

• 6.023 × 10²³ J

450 mg of glucose is dissolved in 100 g of solvent. What is the molality of solution?

• 0.0025 m

• 0.025 m

• 0.25 m

• 2.5 m

2.5 cm³ of 0.2 M H₂SO₄ solution is diluted to 0.5 dm³. Find normality of the diluted solution?

• 0.2 N

• 0.02 N

• 0.002 N

• 0.04 N

The molar concentration of chloride ions in the resulting solution of 300 mL of 3.0 M NaCl and 200 mL of 4.0 M BaCl₂ will be

• 1.7 M

• 1.8 M

• 5.0 M

• 3.5 M

The volume concentration of hydrogen peroxide having 6.8% concentration will be

• 5

• 11.2

• 22.4

• 20

57.

The volume of oxygen evolved at STP by decomposition of 0.68 g '20 volume' hydrogen peroxide solution is

• 2.24mL

• 22.4mL

• 224mL

• 2240mL

What is the molality of a solution containing 200 mg of urea (molar mass 60 g mol^-1) dissolved in 40 g of water?

• 0.0825

• 0.825

• 0.498

• 0.0013

What is the mass of one molecule of yellow phosphorus? (Atomic mass, P = 30)

• 1.993 × 10^-22 kg

• 1.993 × 10^-19 mg

• 4.983 × 10^-20 kg

• 4.983 × 10^-23 mg

What is the volume of water consumed during acid hydrolysis of 1.368 kg of sucrose?

(Given : molar masses of sucrose = 342, water = 18, density of water = 1g/cm³)

• 0.072 dm³

• 0.070 dm³

• 0.18 dm³

• 0.018 dm³