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- 1. Multiple Choice
Which of the following has highest electron gain enthalpy?
Fluorine
Chlorine
Bromine
Iodine
- 2. Multiple Choice
In interhalogen compounds, which halogen is never the central atom.
I
Cl
Br
F
- 3. Multiple Choice
The inert gas mixed with oxygen, used for respiration by the sea divers is-:
He
Ne
Ar
Kr
- 4. Multiple Choice
The catalyst used in preparation of H2SO4 by Contact process is-:
V2O5
MnO2
TiCl4
AlCl3
- 5. Multiple Choice
The general electronic configuration of group-16 elements is-:
ns2 np4
ns2 np5
ns1 np4
ns2 np6
- 6. Multiple Choice
The catalyst increases the rate of the reaction by
increasing Ea
increasing T
decreasing Ea
decreasing T
- 7. Multiple Choice
The half life of first order reaction is
t1/2 =0.693/k
t1/2 =0.693k
t1/2 = -0.693/k
t1/2 =-0.693k
- 8. Multiple Choice
The integrated rate law for the first order reaction is
𝐴0 = 𝐴t𝑒 −𝑘𝑡
𝐴𝑡 = −𝐴0𝑒 −𝑘𝑡
𝑨𝒕 = 𝑨𝟎𝒆 −𝒌𝒕
𝐴𝑡 = 2 𝐴0𝑒 −𝑘�
- 9. Multiple Choice
The half life of a first order reaction is 30 min and the initial concentration of the reactant is 0.1M. If the initial concentration of reactant is doubled then the half life of the reaction will be
1800s
60min
10min
900s
- 10. Multiple Choice
The unit of rate constant for first order reaction is
min-2
s
s -1
min
- 11. Multiple Choice
The packing efficiency for a BCC structure is-:
42%
53%
68%
82%
- 12. Multiple Choice
Due to Frenkel defect the density of ionic solid-:
increases
decreases
remains same
fluctuates
- 13. Multiple Choice
Graphite is a -:
metallic crystal
covalent crystal
ionic crystal
molecular crystal
- 14. Multiple Choice
p-type semiconductors is formed when trace amount of impurity is added to silicon. The number of valence electrons in the impurity atom must be-:
3
5
1
2
- 15. Multiple Choice
The number of tetrahedral sites per sphere in ccp structure is-:
1
2
3
4
- 16. Multiple Choice
Which one of the following is diamagnetic
Cr+2
Fe3
Cu2+
Sc3+
- 17. Multiple Choice
Elements with atomic number greater than --------- are called as transuranium
90
91
92
93
- 18. Multiple Choice
Which among the following ion is coloured?
Sc3+
Zn2+
Ti4+
V2+
- 19. Multiple Choice
Which among the following element is radioactive
Lu
Dy
Yb
Pm
- 20. Multiple Choice
IUPAC name of K4[Fe(CN)6] is
potassium hexacyanoiron(II)
potassium iron(II) hexacyano
tetrapotassium iron(II) hexacyano
potassium hexacyanoferrate (II)
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