11.

Ce⁴⁺ is stable. This is because of

• half-filled d-orbitals

• all paired electrons ind-orbitals

• empty orbital

• fully filled d-orbital

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 pressure of a fas is 100 kPa. If it is compressed from 1 m³ to 10 dm³ find the work done.

• 990 J

• 9990 J

• 9900 J

• 99000 J

Which is not an example of common ion effect?

• NaCl+ AgCl

• H₂S+ HCl

• CH₃COOH+ NaOH

• NH₄OH+ NH₄Cl

NH₄Cl is acidic due to

• cationic hydrolysis

• anionic hydrolysis

• its ionic nature

• pH > 7

Potassium metabisulphite is a(an)

• preservative

• antioxidant

• artificial sweetener

• Both (a) and (b)

The number of metamers possible for C₄H₁₀O is

• 1

• 2

• 3

• 4

The heat of formation of water is 260 kJ. How much H₂O is decomposed by 130 kJ of heat?

• 0.25 mol

• 1 mol

• 0.5 mol

• 2 mol

Which of the following is a nucleophile?

• BH₃

• NH₃

• AlCl₃

• All of these