Punjab State Board of Technical Education and Industrial Training 2010 Diploma Mechanical Engineering Applied chemistry - Question Paper

Section-A
Q1. Fill in the blanks:
i. Dimensionl formula of surface tension is...................
ii. Molarity of a solution is expressed as..................
iii. A chemical formula is based upon the legal regulations of...................
iv. Bond length is measured in....................
v. Chemical name of permutit is......................
vi. Water that forms lather with soap easily is......................
vii. I.P.P.M. means.......................
viii. The substances which show the end-point during titrations are called.......................

State actual or False:
i. A solution whose PH-value is seven is basic.
ii. Electric current is the flow of electrons.
iii. During ionization, whole of substance ionizes.
iv. Formula of phenol is
v. Nickel-Iron cell is a secondary cell.
vi. Halogens belong to p-block.
vii. Ozidation and redution go hand in hand.



Section-B
Q2. Attempt any ten ques..
i. What info is conveyed by the subsequent eguation Mg+H2SO4-->MgSO4+H2?
ii. compute the molarity of a solution containing 2.12g of Na2SO2 in 200ml of the solution.
iii.Explain in brief PAULI'S EXCLUSION principle.
iv. discuss the sixe of atoms in periods and groups.
v. discuss in brief caustic embritterment.
vi. elaborate the characteristics of water for drinking purposes?
vii. What is Charles law, Avogadro's and Gas constant.
viii. explain in brief applications of electrolysis.
ix. discuss secondary cells.
x. What is a buffer solution? discuss the action of buffer solution.
xi. provide the funtional groups of
a. Paraffins
b. Ethers
c. Alcohols
d. Ethers
e. Aldehydes
f. Keytones



Section-C
Q3a. Whgat are the limitations of hit and trial mithod for balancing chemical equation? How these drawbavks are overcome by partial equation?
b. Nme the 4 quantum numbers. discuss the significance of every quantum numbers.
OR
a. State and discuss
i. Aufban principle
ii. Hund's rule of multiplicity
b. describe nolarity(m), molality, molar mass, molar quantity and standard solution.
Q4.a. elaborate the complications that arise when hard water is used in boiler for raising steam?
b. discuss with example sp, sp2 and sp3 hybradisation.
OR
a. How will you remove hardness of water by ion exvhange process? explain with Dagram.
b. discuss Le-Chatelier's principal and PH-scale.
Q5a. compute the weight of cu deposited when a current of 0.5 Ampere is passed for 20 minutes through a solution of CiSO4 (E.C.E. of Cu=0.00032)
b.State and discuss Faradays IInd legal regulations of electrolysis.
OR
a. discuss briefly 'Groups' and 'Periods' in the long form of periodic table.
b. explain in brief lead-acid storage cell.

Earning:   Approval pending.