Plus Two/ +2/ 12th Std/ HSC Chemistry Model Question Paper : www.dge.tn.gov.in Directorate of Government Examination

Name of the Board : Tamilnadu Directorate of Government Examination
Name of the Exam : Higher Secondary
Subject : Chemistry
Document Type : Question Paper
Website : dge.tn.gov.in

Download Model/Sample Question Paper :
March 2013 : https://www.pdfquestion.in/uploads/dge.tn.gov.in/6942-marchchemistry.pdf
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TN DGE Chemistry Model Paper

PART – III :
Instructions:
(1) Check the question paper for fairness of printing. If there is any lack of fairness, inform the Hall Supervisor immediately.
(2) Use Black or Blue ink to write and pencil to draw diagrams.

Related : Directorate of Government Examination DGE Higher Secondary Biology Question Paper : www.pdfquestion.in/6939.html

Note :
Draw diagrams and write equations wherever necessary.
Note :
i) Answer all the questions.
(ii) Choose and write the correct answer.

Part – I

Thermodynamic condition for irreversible spontaneous process at constant T” and “P”
a) AG – 0 (b) AG 0
(c) AG > 0 – d) both (b) and (c)
The total number of atoms per unit cell in foc is :
a) 1 (b) 2 (c) 3 (d) 4

Dual character of an electron was explained by : a) Bohr (b) Heisenberg (c) De Broglie (d) Pauli
Which one of the following is a simple ether ? (a) CH3 – O – C2H5 (b) Cahs – O – CH3 (c) C2H5 – O – C2H5 (d) – O – C2H5
[FeF6]4 is paramagnetic because: (a) F- is a weaker ligand (b) F- is a stronger ligand (c) F- is a flexidinate ligand (d) F- is a chelating ligand

In the manufacture of ammonia by Habers process, the maximum yield of ammonia will be obtained with the process having :
a) low pressure and high temperature b) low pressure and low temperature
(c) high pressure and high temperature (d) high pressure and low temperature
The phenomenon of Tyndalls effect is not observed in : a) emulsion (b) colloidal solution

In nitroalkanes – NO2 group is converted to -NH2 group by using the reagent: (a) SnHCl (b) Zn dust (c) ZnNH4Cl (d) ZnNaOH
The metals present in Nichrome alloy : a) Cr, Ni, Fe (b) Cr, Co, Ni (c) Cr, Fe (d) Cr, Fe, Cu
(c) Crystallisation of sucrose from solution (d) Sublimation of camphor

The noble gases are unreactive because they : a) have same number of electrons (b) have an atomicity of one (c) are gases with low density
When pH of a solution is 2, the hydrogen ion concentration in moles litre will be: (a) 1×1012 (b) 1 10-4 (c) 1.x 10-7 (d) 1.×10-2
Ethylene diamine is converted to ethylene glycol using: (a) Na2CO3 solution (b) Nitrous acid (c) NaHCO3 solution (d) Baeyers reagent
(c) unpaired electrons (d) completely vacant electronic sub-shells

Conversion of benzene diazonium chloride to chlorobenzene is :
a) Sandmeyers reaction (b) Stephens reaction
(c) Gomberg reaction (d) Schotten – Baumann reaction
The organic compound that undergoes carbylamine reaction is : a) (C2H5)2NH (b) C2H5NH2 (c) (C2H5)3N (d) (C2H5)IT

On moving down a group, the radius of an ion : a) decreases
(b) increases (c) first increases and then decreases (d) remains constant
For a reaction Ea-0 and K.2×109 sect 1 at 300 K, the value of K at 310 K will be: (b) .4 103 sec1 (c) .4×105 sect 1 (d) 4.5 sec-1

Part – II

State Heisenbergs uncertainty principle.
Why electron affinity of fluorine is less than that of chlorine 7
Write a note on Plumbosolvency.
Why do dblock elements exhibit variable oxidation states ?
Calculate the entropy change for the following process possessing -1. 1 mole Sn, 13°C) = 1 mole SnB, 13°C)
Give three examples for opposing reactions.
State Faradays second law of electrolysis.
What is bond order ?
Calculate the effective nuclear charge of the lastelectroninanatomwhose configuration : 1.2 0.2 0.6 -2 2-5 _
What is inert pair effect ?
How silver nitrate reacts with orthophosphoric acid ?
Give the percentage composition and use of Nichrome,
What is the action of heat on K.Cr,O, ?
What is Q value of a nuclear reaction ?

Sketch the :
(a) Simple cube
(b) Face – Centred cube and
(c) Body centred cube

For a chemical reaction the values of AH and AS at 400 K are -10 K cal mol-‘ and 20 cal.deg mol respectively, Calculate the value of AG of the reaction