[Sashwat]

I am searching here for question paper for 12th grade chemistry examination of Tamil nadu state board examination ??

Here I am giving you question paper for 12th grade chemistry examination of Tamil nadu state board examination below ..

1. Name the type of point defect that occurs in a crystal of zinc sulphide. 1
2. The decomposition reaction of ammonia gas on platinum surface has a rate constant k = 2.5 x 10 4 mol L 1 S 1.
What is the order of the reaction? 1

3. Give the IUPAC name of the following compound 1

4. How many octahedral voids are there in l mole of a compound having cubic close packed structure? 1

7. In the ring test for identification of nitrate ion, what is the formula of the compound responsible for the brown ring
formed at the interface of two liquids? 1

8. Except for vitamin B12, all other vitamins of group B, should be supplied regularly in diet. Why? 1

9. An element E crystallizes in body centred cubic structure. If the edge length of the cell is 1.469 x 10 10 m and the
density is 19.3 g cm-3, calculate the atomic mass of this element. Also calculate the radius of an atom of this
element. 2

11 (a) Adsorption of a gas on the surface of solid is generally accompanied by a decrease in entropy. Still it is a
spontaneaons process. Explain.
(b) How does an increase in temperature affect both physical as well as chemical adsorption?

I am in 12 class Maharashtra board science stream I want 12 class previous year chemistry paper please provide me the same

[Nilesh]

As you said you want 12 class chemistry paper for maharashtra board
I am providing you the same

Q What is ‘boiling point’?
Derive a relation between H and U for a chemical reaction.
Draw neat labelled diagram of calomel electrode.

Q. One mole of a gas expands by 3 L against a constant pressure of 3 atmosphere. Calculate the work done in:
a. L. atmosphere
b. Joules
c. Calories

Q Describe anomalous behavious of fluorine with the other elements of group 17 with reference to:
a. Hydrogen bonding
b. Oxidation state
c. Polyhalide ions

\Q What is the action of the following reagents on ammonia:
a. Nessler’s reagent
b. Sodium metal

Q State the first and second law of electrolysis.

Q Draw neat and labelled diagram of Bessemer converter used in the extraction of copper.
Q Derive the relation between half-life period and rate constant for first order reaction.
Q Derive the relation between Gand equilibrium constant (K) for the reaction,
aA + bB cC + dD.
Q Explain brown ring test with the help of chemical equation.
Q Explain, why do aquatic animals prefer to stay at lower level of water during summer?
Q Distinguish between:
Crystalline solids and Amorphous solids.

Maharasthra board 12 class chemistry paper