221.

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

• 20.44 gm

• 6.00 gm

• 4.00 gm

• 10.22 gm

The concentration of H₂O₂ solution of 10 volume is

• 30%

• 3%

• 1%

• 10%

One mole of magnesium nitride on the reaction with an excess of water gives

• one mole of NH₃

• two moles of NH₃

• one mole of HNO₃

• two moles of HNO₃

2.5 L of NaCl solution contain 5 moles of the solute. What is the molarity ?

• 5 M

• 2 M

• 2.5 M

• 12.5 M

In acidic medium, the equivalent weight of  K₂Cr₂O₇ ( Mol. wt. = M) is

• M

• M/2

• M/3

• M/6

What is the total number of moles of H₂SO₄ needed to prepare 5.0 L at a 2.0M solution of H₂SO₄ ?

• 2.5

• 5.0

• 10

• 20

In stoichiometric defect, the ratio of positive and negative ions as indicated by chemical formula of the compound

• decreases

• increases

• changes by a factor of 2

• remains same

Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is

• 2.28 mol kg^-1

• 3.28 mol kg^-1

• 0.44 mol kg^-1

• 1.14 mol kg^-1

Consider the following reaction,

(CH₃)₃CCl + OH^- → (CH₃)₃C-OH + Cl^-

If OH^- does not take part in slow step, the molecularity and order of the reaction are respectively,

• 2, 2

• 2, 1

• 1, 2

• 1, 1

When one litre one molar sulphuric acid solution is diluted with 5 L water, the normality of the obtained solution is

• 0.2 N

• 0.33 N

• 10 N

• 5 N