1.

The two electrons have the following set of quantum numbers, P =3,2, -2 +1/2, Q =3,0,0 + 1/2. Which of the following statement is true?

• P and Q have same energy

• P has greater energy than Q

• P has lesser energy than Q

• P and Q represent same electron

0.06% (w/V) aqueous solution of urea is isotonic with

• 0.06% glucose solution

• 0.6% glucose solution

• 0.01M glucose solution

• 0.1M glucose solution

Which one of the following conversion results in the change of hybridisation and geometry?

• CH₄ to C₂H₂

• NH₃ to N⁺H₄

• BF₃ to BF${}_4^{-}$

• H₂O to H₃O⁺

0.30 g of an organic compound containing C, H and oxygen on combustion yields 0.44 g of CO₂ and 0.18 g of H₂O. If one mole of compound weighs 60, then molecular formula of the compound is

• CH₂O

• C₃H₈O

• C₄H₆O

• C₂H₄O₂

Plot of Maxwell's distribution of velocities is given below.

Which of the following is correct about this plot?

• T₁ < T₂

• f₁ > f₂

• T₁> T₂

• V₁ < V₂

The pair of compound which cannot exist together in solution is

• NaHCO₃ and NaOH

• NaHCO₃ and H₂O

• NaHCO₃ and Na₂CO₃

• Na₂CO₃ and NaOH

What amount of dioxygen (in gram) contains 1.8 × 10²² molecules?

• 0.0960

• 0.960

• 9.60

• 96.0

Using MOT, compare ${\mathrm{O}}_2^{+} \mathrm{and} {\mathrm{O}}_2^{-}$ species and choose the inncorrect option.

• ${\mathrm{O}}_2^{+}$ have higher bond order than ${\mathrm{O}}_2^{-}$

• ${\mathrm{O}}_2^{-}$ is less stable

• ${\mathrm{O}}_2^{+}$ is diamagnetic while ${\mathrm{O}}_2^{-}$ is paramagnetic

• Both ${\mathrm{O}}_2^{-} \mathrm{and} {\mathrm{O}}_2^{+}$ are paramagnetic

$\mathrm{In} \mathrm{the} \mathrm{reaction}, \mathrm{S} + \frac{3}{2}{\mathrm{O}}_2\to {\mathrm{SO}}_3+ 2\mathrm{xkJ} \mathrm{and} {\mathrm{SO}}_2+ \frac{1}{2}{\mathrm{O}}_2\to {\mathrm{SO}}_3+ \mathrm{ykJ}.$ Heat of formation of SO₂ is

• x + y

• x - y

• 2x-y

• 2x + y

H₂O₂ cannot oxidise

• PbS

• Na₂SO₃

• O₃

• KI