Chemistry Sample Test Paper 4 - AIEEE 2009

Advertisements

(SOLVED)
Note : All Answers are in red.

1. Which of the following substances are expected to be covalent ?
BeCl₁
SnCl₄
ZnS
ZnCl₂

2. Which of the following species contain covalent co-ordinate bond?
BCl₃
CO
[Fe(CN)₆]^2-
KCl

3. Which statement is correct about hybridization :
In hybridzation orbitals take part
In hybridization electrons take part
In hybridzation fully filled , half or empty orbitals can t take part
Hybridzed orbitals only contains bond pair electron

4. Which is true about NH₂^-, NH₃ ,NH₄⁺ :
hybridization of N is same
no. of lone pair of electron on N are same
geometry is not same
bond angle is same

5. Which is true about OF₂ & Cl₂O : which of the following is not true.
Both are sp³ hybridsied
Bond angle in OF₂ less than 9�8
Bond Angle in Cl₂O is greater than 9�8
Bond Angle in both cases are 9�8

6. Which of the following are not correct for dipole moment ?
Lone pair of elements present on central atom can give rise to dipole moment
Dipole moment is vector quantity
CO₂ molecule has dipole moment
Difference in electronegativities of combining atom can lead to dipole moment

7. Which statement is incorrect
Polarising power refers to cation
Polarisability refers to anoin
Small cation is more efficient to polarise anion
Molecules in which cation having pseudo inert gas configuration are less covalent

8. The species which contain an odd number of valence electrons and are paramagnetic are, which of the following is not true.
NO
NO₂
ClO₂
N₂O₄

9. Which of the following factors are not responsible for van der Waal s forces ?
Instantaneous dipole-induced dipole attraction
Dipole-induced dipole interaction and ion-induced dipole interaction
Dipole-dipole interaction and ion-induced-dipole interaction
Small size of molecule

10. In which molecule(s) is/are the vander Waals force likely to be most important in determining m.p. and b.p.
ICI
Br₂
H₂S
CO