Hydrogen Bond and 12th Chemistry Guess

Topics: Hydrogen bond, Boiling point, Chemistry Pages: 32 (4368 words) Published: January 20, 2014
CBSE Class 12th Chemistry Guess Paper 2014

PREFACE
E CAF E R P
The Guess Paper is a product of CBSE Class 12th Board exam experts of jagranjosh. com, an online educational portal of Dainik Jagran.
After a round analysis for the previous three years of CBSE Class 12th Board Chemistry Question papers, the jagranjosh.com experts have set this Guess Paper for the 2014 CBSE Class 12th Boards.
An analysis of Previous Years Chemistry Question Papers has been mentioned here:

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CBSE Class 12th Chemistry Guess Paper 2014

Below are the Chapters covered under the entitled units:

This conceptual Guess Paper along with guided solutions is a product exclusively for CBSE Class 12th students. The pattern of the Guess Paper is as per the Previous Year’s CBSE Board Chemistry Question Papers, thus the students will find it easy and understandable in all its aspects.

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CBSE Class 12th Chemistry Guess Paper 2014

Guess Paper: 2014
Class: XII
Subject: Chemistry
Time Allowed: 3Hours

Maximum Marks: 70

General Instructions:
1.
2.
3.
4.
5.
6.
7.

All questions are compulsory.
There are 30 Questions in all.
“Section – A” from 1 to 8 carry 1 mark each.
“Section – B” from 9 to 18 carry 2 marks each.
“Section – C” from 19 to 27 carry 3 marks each.
“Section – D” from 28 to 30 carry 5 marks each.
Internal choices have been provided in some questions. Use Log Tables, if necessary.

“Section – A”
Q 1. Arrange the following compounds in order of increasing boiling points.

1–Chloropropane, Isopropyl chloride, 1–Chlorobutane

Q 2. For the reaction: N 2 (g) + 3H 2 (g) → 2NH 3 (g)
If

∆ [ NH 3 ]
∆ H
= 4 ×10−8 mol−1s −1 , what is the value of − [ 2 ] ? ∆t
∆t

Q 3. ‘Crystalline solids are anisotropic in nature.’ What does this statement mean? Q 4. What would happen if no salt bridge were used in an electrochemical cell (like Zn–Cu cell)?

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CBSE Class 12th Chemistry Guess Paper 2014

Q 5. CuSO4.5H2O is blue in colour while CuSO4 is colourless. Why? Q 6. Draw the structure of XeO3 molecule?
Q 7. Write the structural formula and IUPAC name of isobutyl alcohol? Q 8. Arrange the following in order of decreasing ease of dehydration:

( CH3 )3 COH, CH3CH 2OH, ( CH3 )2 CHOH

“Section – B”
Q 9. The chemistry of corrosion of iron is essentially an electrochemical phenomenon. Explain the reactions occurring during the corrosion of iron in the atmosphere.
Q 10. State Raoult’s law for a solution containing volatile liquids. Explain with suitable example the concept of maximum boiling azeotropes.
Q 11. An aqueous solution containing urea was found to have to have boiling...
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