Smallest wavelength occurs for from Chemistry NEET Year 2011 Fre

Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Predict the product of reaction of I2 with H2O2 in basic medium

  • I-

  • I2O3

  • IO3-

  • I3-


2.

Which of the following is not hygroscopic?

  • CsCl

  • MgCl2

  • CaCl2

  • LiCl


3.

Decreasing order of bond angle is

  • BeCl2 > NO2 > SO2

  • BeCl2 > SO2 > NO2

  • SO2 > BeCl2 > NO2

  • SO2 > NO2 > BeCl2


4.

The enthalpy of formation of CO(g), CO2(g), N2O(g), and N2O4(g) is -110, -393, +811 and 10 kJ/mol respectively. For the reaction, N2O4 + 3CO(g) N2O(g)+ 3CO2(g)Hr (kJ/mol) is

  • -212

  • +212

  • +48

  • -48


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5.

Smallest wavelength occurs for

  • Lyman series

  • Balmer series

  • Paschen series

  • Brackett series


A.

Lyman series

Smallest wavelength occurs in Lyman series. 

Wavelength increases from Lyman > Balmer > Paschen > Brackett > Pfund.


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6.

Ksp of CaSO4.5H2O is 9 ×10-6, find the volume for 1 g of CaSO4 (M.wt. = 136).

  • 2.45 litres

  • 5.1 litres

  • 4.52 litres

  • 3.2 litres


7.

Which of the following is not a characteristic of equilibrium?

  • Rate is equal in both directions

  • Measurable quantities are constant at equilibrium.

  • Equilibrium occurs in reversible condition.

  • Equilibrium occurs only in open vessel at constant temperature.


8.

Which of the following is wrong for Bohr model?

  • It establishes stability of atom

  • It is inconsistent with Heisenberg uncertainty principle.

  • It explains the concept of spectral lines for hydrogen like species.

  • Electrons behave as particle and wave


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9.

In the van der Waals equation, 'a' signifies

  • intermolecular attraction

  • intramolecular attraction

  • attraction between molecules and wall of container

  • volume of molecules


10.

For adiabatic process, which is correct?

  • T = 0

  • S = 0

  • q = 0

  • qp = 0


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