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IET·I05(B) I B.Tech. Civil (Construction Management)1 B.Tech. Civil (Water ResoUrces Engineering) December, 2016
00550
ET·105(B) CHEMISTRY
Time: 3 hours Maximum Marks: 70
Note: Question no. 1 is compulsory..Attempt any six questions from questions number 2 to 11. Use of calculator is permitted.

1. Lanthanide and actinide series belong to 1

s-block elements

p-block elements

d-block elements

f-block elements

As atomic number increases 1

energy level of the orbitals decreases

energy level of the orbitals increases

energy level of the orbitals remains constant

energy level of the orbitals first increases then decreases

Select the element having lower ionization energy from each of the pairs given below: 3

3Li and 9F

7N and 8O

9F and 53I

Electrolysis of aqueous NaCl solution will produce



and Cl2(g)

and NaOH

and Cl2(g)

Write the enol form of 1,3-Diketone. 2

Write one contribution each of the following scientists 3

Becquerel

J. Chadwick

Aston

Name the process associated with each of the following: 3

Parkes' process

Ostwald process

Solvay process

Give one important use for each of the following compounds: 3

CCl2F2

(C2H5)4Pb

CH2 CHCN

In +ve electromeric effect, if an electron is added to the following compound, then in which direction will n electron transfer take place -C3 to C2 or C2 to C3 Justify.

CH3 -CH=CH-CH2 -CH3 3

Teflon, polystyrene and neoprene, all are

Copolymers

Condensation polymers

Homopolymers

Monomers

2. Calculate the density ratio for BCC to FCC unit cell of iron. (aBCC is the lattice constant of BCC unit cell and aFCC is the lattice constant of FCC unit cell) 8

3. K2Cr2O7 solution is added into an acidic solution of FeSO4.

Write the balance equation for the reaction.

Which one is the oxidising agent and which one is the reducing agent?

What is the oxidation number of chromium before and after the reaction

What is the change in oxidation number of iron?


4. Which ore is called the fool's gold?

How is pig iron obtained in a blast furnace? Give the chemical reactions occurring in a blast furnace when hematite, limestone and coke are charged in the blast furnace and air or oxygen is blown from the bottom.

5. Answer the following:

When is a ligand termed as a chelating ligand? Give one example.

Which one or will be more stable and why stands for diethylene triamine)

Which one or is a monodentate ligand?

Ligand is a Lewis

6. Name the following coordination compounds according to IUPAC nomenclature: 2+2+2+2=8



[Co(NH3)3Cl3].





7. How will you convert CH3CH2I into any of the two compounds given below? Also give the names of the reagents and conditions used and steps involved in each case.

C4H10

CH3CH2COOH

C2H6

C2H2

8. Answer the following:

How many isomers are possible for C4H10O Draw all the structures.

A compound with molecular formula C7H16 shows optical isomerism, the compound will be

2,3--Dimethyl pentane

2,2-Dimethyl pentane

2-Methyl hexane

9. A mixture with the mole ratio of H2 an O2 as 2 1 is used to prepare water by the allowing reaction:

2H2(g) H2O(g)

The total pressure in the container is 0.8 atm at 20°C before the reaction. The temperature is raised to 120°C and allowed to attain equilibrium. Determine the final pressure at 120°C after the reaction, assuming 80% yield of water.

(Hint Use Gay-Lussac law to determine the initial pressure at 120°C)

10. What will be the nature of slope, for a plot between P and V when 1 mole of an ideal gas is expanded

Isothermally (PV const.)

Adiabatically const.),

What will be the relation between T and V for an ideal gas under adiabatic condition
(Given: dE =CvdT)

11. Under what condition will the work be a state function

The standard heat of formation of CO2(g) and H2O(g) are -76.2, -394.8 and -241.6 kJ mol^-1 respectively. Calculate the amount of heat evolved by burning 1 m^3 of CH4 measured under standard condition.