What amount of bromine will be required to convert 2 g of phenol into 2, 4, 6-tribromo phenol?

• 4.00

• 6.00

• 10.22

• 20.44

What is the amount of urea dissolved per litre, if aqueous solution is isotonic with 10% cane sugar solution (mol. wt. of urea = 60) ?

• 200 g/L

• 19.2 g/L

• 17.54 g/L

• 16.7 g/L

The volume of 2 N H₂SO₄ solution is 0.1 dm³. The volume of its decinormal solution (in dm³) will be

• 0.1

• 0.2

• 2

• 1.7

The percentage (by weight) of sodium hydroxide in a 1.25 molal NaOH solution is

• 4.76%

• 1.25%

• 5%

• 40%

The calculated mass of ₂₀Ca⁴⁰ is 40.328 u. It releases 306.3 MeV energy in a nuclear process. Its isotopic mass is

• 39.998

• 40.6570

• 0.3290

• 2.85 × 10⁴

Which of the following concentration factors is affected by change in temperature?

• Molarity

• Molality

• Mole fraction

• Weight fraction

An aqueous solution of urea containing 18g urea in 1500 cm³ of the solution has a density equal to 1.052. If the molecular weight of urea is 60, the molality of the solution is

• 0.200

• 0.192

• 0.100

• 1.200

What volume of 2M H₂SO₄ is required to form 0.2 N of 100 mL of solution?

• 5 mL

• 20 mL

• 10 mL

• 50 mL

49.

How many gram-equivalents of NaOH are required to neutralise 25 cm³ of a decinormal HCl solution?

• 0.00125

• 0.0025

• 0.0050

• 0.025

1 mol alcohol reacts with Na to give what weight of hydrogen ?

• 1 gm

• 2 gm

• 3 gm

• 3.5 gm