JEE Chemistry Solved Question Paper 2003 | Previous Year Papers | Zigya

Subject

Chemistry

Class

JEE Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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1.

The standard adopted for the determination of atomic weight of elements is based on :

  • H1

  • C12

  • O16

  • S32


2.

Law of multiple proportions is illustrated by one of the following pairs :

  • N2O and NO

  • H2S and SO2

  • NH3 and Na2O

  • BeO and BeCl2


3.

Paramagnetism of oxygen is explained on the basis of its electronic configuration of

  • (π*2px)1(π2py)1

  • (π*2py)1(π*2pz)1

  • (σ*2s)1(π2py)1

  • (σ*2s)1(π2py)1


4.

The van der Waals' equation for a real gas is given by the formula P + n2aV2 (V - nb) = nRT where, P, V, T and n are the pressure, volume, temperature and the number of moles of the gas. Which one is the correct interpretation for the parameter a?

  • The parameter a accounts for the finite size of the molecule, not included temperature in the ideal gas law

  • The parameter a accounts for the shape of gas phase molecules

  • The parameter a accounts for intermolecular interaction's present in the molecule

  • The parameter a has no physical significance and van der Waals' introduced it as a numerical correction factor only


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5.

Avogadro's hypothesis states that :

  • the ideal gas consists of a large number of small particles called molecules

  • under the same conditions of temperature and pressure equal volumes of gases contain the same number of molecules

  • volume of a definite quantity of gas at constant pressure is directly proportional to absolute temperature

  • a given mass of gas at constant pressure is directly proportional to absolute temperature


6.

The observation that the ground state of nitrogen atom has 3 unpaired electrons in its electronic configuration and not otherwise is associated with:

  • Pauli's exclusion principle

  • Hund's rule of maximum multiplicity

  • Heisenberg's uncertainty relation

  • Ritz combination principle


7.

Which of the following overlaps leads to bonding?


8.

In the periodic table metallic character of elements shows one of the following trend :

  • decreases down the group and increases across the period

  • increases down the group and decreases across the period 

  • increases across the period and also down the group

  • decreases across the period and also down the group


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9.

Which of the following statements is correct ?

  • All carbon to carbon bonds contain a σ-bond and one or more π-bonds

  • All carbon to hydrogen bonds are π-bonds

  • All oxygen to hydrogen bonds are hydrogen bonds

  • All carbon to hydrogen bonds are π-bonds


10.

An example of a polar covalent compound is :

  • KCl

  • NaCl

  • CCl4

  • HCl


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