Question

Q.1 Select and write the correct answer. (7)
DHOLE PATIL EDUCATION
SOCIETY
12th Science : Chemistry
1. Diamond is an example of
A) Solid with hydrogen bonding B) Electrovalent solid
C) Covalent solid D) Glass
2. The solid phosphorus pentachloride exists as
A) PCl5 B) PCl4
+Cl–
C) PCl6
– D) PCl4
+.PCl6
–
3. Which of the following has highest nucleo philicity?
A) F– B) OH–
C) CH3
– D) NH+
2
4. Calculate the potential (in volts) for the following voltaic cell at 25 ºC.
Cr | Cr3+ (0.10 M) || Cu2+ (0.0010 M) Cu
A) 1.25V B) 1.33V
C) 1.41V D) 1.57V
5. Which of the following represents the increasing order of boiling points of (1), (2) and (3)?
(1) CH3 – CH2 – CH2 – CH2 – OH
(2) (CH3)
2CHOCH3
(3) (CH3)
3COH
A) (1) < (2) < (3) B) (2) < (1) < (3)
C) (3) < (2) < (1) D) (2) < (3) < (1)
6. In 2, 3, 4 – Tribromopentane, the number of chiral carbon atom present is
A) 1 B) 2
C) 3 D) 4
7. Which of the following is not correct?
A) Four spheres are involved in the
formation of tetrahedral void
B) The centres of spheres in octahedral voids are at
the apices of a regular tetrahedron
C) If the number of atoms is N the number
of octahedral voids is 2N
D) If the number of atoms is N/2, the number of
tetrahedral voids is N

Answer 1

Answer:

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