X litre of carbon monoxide is present at STP. It is completely oxidized to CO₂. The volume of CO₂ formed is 11.207 litres. What is the value of X in litres?

• 22.414

• 11.207

• 5.6035

• 44.828

The bond energies (in kJ mol^-1) of P-H; As- H and N-H are respectively

• 247, 389 and 318

• 247, 389 and 318

• 318, 389 and 247

• 318, 247 and 389

Which one of the following represents the correct order of electronegativity ?

• P > O > N

• N > P > O

• O > N > P

• N > O > P

4 g of an ideal gas occupies 5.6035 L of volume at 546 K and 2 atmosphere pressure. What is its molecular weight?

• 4

• 16

• 32

• 64

Which one of the following statements is correct with respect to basic character ?

• PH₃ > P(CH₃)₃

• PH₃ = NH₃

• PH₃ > NH₃

• P(CH₃)₃ > PH₃

The calculated magnetic moment (in Bohr magnetons of Cu²⁺ ion is)

• 1.73

• zero

• 2.6

• 3.4

75 mL of 0.2 M HCl is mixed with 25 mL of 1M HCl. To this solution, 300 mL of distilled water is added. What is the pH of the resultant solution?

• 1

• 2

• 4

• 0.2

The concentration of a 100 mL solution containing X g of Na₂CO₃ (molecular wt. = 106) is Y M. The values of X and Y are respectively.

• 2.12, 0.05

• 1.06, 0.2

• 1.06, 0.1

• 2.12, 0.1

One mole of fluorine is reacted with two moles of hot concentrated KOH. The products formed are KF, H₂O and O₂. The molar ratio of KF, H₂O and O₂ , respectively is

• 1 : 1 : 2

• 2 : 1 : 0.5

• 1 : 2 : 1

• 2 : 1 : 2

Which one of the following molecules contain both ionic and covalent bonds?

• CH₂Cl₂

• K₂SO₄

• BeCl₂

• SO₂