Punjab Technical University 2007 A.M.I.E General Branch of Engineering Subjects Chemistry - Question Paper

part - I

Q1A]State your observations with balanced equations when (10 Marks)


1. Sulphur reacts with chlorine.
2. Iron is heated in a current of chlorine.
3. Aqueous copper sulphate is electrol ysed ranging from copper electrodes.
4. Sodium nitrate is strongly heated in a test-tube.
5. Burning magnesium is introduced into a jar containing sulphur dioxide.


B]
Name the subsequent by giving 1 term / phrase. (6 Marks)
1. Alkanes decomposed at high temperature in the absence of air.
2. Process of extraction of a metal in a pure state on a large scale from its ore
by physical or chemical means.
3. The extent to which an electrolyte dissociates into ions.
4. Reheating of the quenched steel to varying temperature subsequent
by slow cooling.
5. Compounds of nitrogen are broken down into nitrogen and transferred
to atmosphere.
6. A process in which the impure metal is heated on the sloping
hearth of a furnace.

C] Consider subsequent ions to be current in an electrolyte:
Na+, K1+, H+, SO42-, Cl-, OH- 2F platinum electrodes are used in its electrolysis
name: (5 Marks)
1. The ion that would be discharged at the anode.
2. The ion that would be discharged at the cathode.
3. provide a cause to support your ans in (1) and (2).
4. Summarize the ionic reactions taking place at the cathode and at anode.

d]
provided beneath is a list of elements:
Sodium, Potassium, Magnesium, Silicon, Lithium, Phosphorus, Cesium, Argon,
Chlorine, Aluminium, Rubidium, Francium

1. choose from the list (i) Elements that belong to the identical period.
(ii) Elements that belong to the identical group (2Marks) . (2 Marks)
2. organize the members of the period in order of
(i) Decreasing atomic radii.
(ii) Decreasing valence electron (2 Marks)
3. choose from the period 2 elements that have
(i) Less than half-filled orbits
(ii) More than half-filled orbits (2 Marks)
4. choose from the group 2 elements that are

Earning:   Approval pending.