Which one of the following conversion results in the change of hy

Subject

Chemistry

Class

JEE Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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


2.

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


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3.

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

  • CH4 to C2H2

  • NH3 to N+H4

  • BF3 to BF4-

  • H2O to H3O+


C.

BF3 to BF4-

In the conversion of BF3 to BF4-.Therefore in BF3 hybridisation is sp2 while in BF4-, the hybridisation is sp3.


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4.

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


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5.

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


6.

The pair of compound which cannot exist together in solution is

  • NaHCO3 and NaOH

  • NaHCO3 and H2O

  • NaHCO3 and Na2CO3

  • Na2COand NaOH


7.

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

  • 0.0960

  • 0.960

  • 9.60

  • 96.0


8.

Using MOT, compare O2+ and O2- species and choose the inncorrect option.

  • O2+ have higher bond order than O2-

  • O2- is less stable

  • O2+ is diamagnetic while O2- is paramagnetic

  • Both O2- and O2+ are paramagnetic


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9.

In the reaction, S + 32O2 SO3+ 2xkJ and SO2+ 12O2SO3+ ykJ. Heat of formation of SO2 is

  • x + y

  • x - y

  • 2x-y

  • 2x + y


10.

H2O2 cannot oxidise

  • PbS

  • Na2SO3

  • O3

  • KI


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