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1	2	3	4	5
6	7	8	9	10

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1.what is the coordination number of atoms in the body centred cubic structure?
A.8
B.12
C.6

2.what is the efficiency of packing in case of face centred cubic crystal ?
A.68%
B.74%
C.52.4%

3.what are the angles in trigonal crystal system?
A.α= β = γ=90
B.α= β = γ≠90
C.α≠ β ≠ γ≠90

4.what is the limiting radius ratio of Zns and SiO2?
A.0.225-0.414
B.0.155-0.225
C.0.414-0.732

5.what kind of matter is glass?
A.liquid
B.super cooled liquid
C.solid

6.Select the correct order of acidic strength?
A.CCl₃COOH < HCCl₂COOH < CH₃COOH
B.HCCl₂COOH < CCl₃COOH < CH₃COOH
C.CH₃COOH < HCCl₂COOH < CCl₃COOH

7.which of the following mixture gives positive deviation from RAOULT'S LAW ?
A.ethanol + cyclohexane
B.benzene + toluene
C.acetone + chloroform

8.How many spectral lines are observed when an electron jumps from 4 th shell to 1st shell ?
A.8
B.6
C.10

9.what is the shape of the d subshell ?
A. spherical
B. Dumbell
C. Double dumbell

10.which of the following has maximum magnetic moment ?
A.Mn⁺²
B.Cr⁺²
C.Ni⁺²

exam model