In acetylene molecule, between the carbon atoms there are from C

Subject

Chemistry

Class

JEE Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

For a stable molecule, the value of bond order must be

  • there is no relationship between stability and bond order

  • zero

  • positive

  • negative


2.

During the formation of a chemical bond

  • electron-electron repulsion becomes more than the nucleus-electron attraction.

  • energy of the system does not change.

  • energy increases

  • energy decreases


3.

Formation of coloured solution is possible when metal ion in the compound contains

  • paired electrons

  • lone pair of electrons

  • unpaired electrons

  • none of the above


4.

Dalton's law of partial pressure is applicable to which one of the following systems?

  • NH3 + HCl

  • NO + O2

  • H+ Cl2

  • CO + H2


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5.

In acetylene molecule, between the carbon atoms there are

  • three pi bonds

  • one sigma and two pi bonds

  • two sigma and one pi bonds

  • three sigma bonds


B.

one sigma and two pi bonds

The structure of acetylene is

H - C 2p1 s C - H

Hence, in acetylene molecule, there are one σ and two πbonds are present between carbon atoms.


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6.

Which of the following is an intensive property?

  • temperature

  • viscosity

  • surface tension

  • all of these


7.

In equilibrium state the value of G is

  • zero

  • negative

  • positive

  • may be negative or positive


8.

In the ionic equation

-BiO3- + 6H+ + xe- → Bi3+ + 3H2O , the value of x is

  • 6

  • 2

  • 4

  • 3


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9.

Molarity of a given orthophosphoric acid solution is 3M. It's normality is

  • 9 N

  • 0.3 N

  • 3 N

  • 1 N


10.

A body of mass 10 mg is moving with a velocity of 100 ms-1. The wavelength of de-Broglie wave associated with it would be (h = 6.63 × 10-34 Js)

  • 6.63 × 10-35 m

  • 6.63 × 10-34 m

  • 6.63 × 10-31 m

  • 6.63 × 10-37 m


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