Identify the compound that exhibits tautomerism from Chemistry

Subject

Chemistry

Class

JEE Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Among the following, the maximum covalent character is shown by the compound

  • FeCl2

  • SnCl2

  • AlCl3

  • AlCl3

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2.

The hybridization of orbitals of N atom in NO3-, NO2+ and NH4+ are respectively

  • sp, sp2,sp3

  • sp2 , sp, sp

  • sp, sp3 , sp2

  • sp, sp3 , sp2

906 Views

3.

A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emission is at 680 nm, the other is at

  • 1035 nm

  • 325 nm

  • 743 nm 

  • 743 nm 

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4.

The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10 dm3 to a volume of 100 dm3 at 27°C is

  • 38.3 J mol-1 K-1

  • 35.8 J  mol-1 K-1

  • 32.3 J  mol-1 K-1

  • 32.3 J  mol-1 K-1

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5.

'a' and 'b' are van der Waals constants for gases. Chlorine is more easily liquefied than ethane because :

  • a and b for Cl2 > a and b for C2H6

  • a and b for Cl2 < a and b for C2H6

  • a and Cl2 < a for C2H6 but b for Cl2 > b for C2H6

  • a and Cl2 < a for C2H6 but b for Cl2 > b for C2H6

257 Views

6.

The outer electron configuration of Gd (Atomic No : 64) is

  • 4f3 5d5 6s2

  • 4f8 5d0 6s2

  • 4f4 5d4 6s2

  • 4f4 5d4 6s2

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7.

Identify the compound that exhibits tautomerism

  • 2-Butene

  • Lactic acid

  • 2-Pentanone

  • 2-Pentanone


C.

2-Pentanone

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8.

Which of the following statement is wrong?

  • The stability of hydrides increases from NH3 to BiH3 in group 15 of the periodic table.

  • Nitrogen cannot form dπ-pπ bond.

  • Single N - N bond is weaker than the single P - P bond.

  • Single N - N bond is weaker than the single P - P bond.

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9.

A 5.2 molal aqueous solution of methyl alcohol, CH3OH, is supplied. What is the mole fraction of methyl alcohol in the solution?

  • 0.100

  • 0.190

  • 0.086 

  • 0.086 

596 Views

10.

Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it form freezing at - 6° C will be : (Kf for water = 1.86 K kg mol-1, and molar mass of ethylene glycol = 62g mol-1)

  • 804.32 g

  • 204.30 g 

  • 400.00 g

  • 400.00 g

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