CHEMISTRY, PAPER-I
FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR
RECRUITMENT TO POSTS IN BPS-17 UNDER
THE FEDERAL GOVERNMENT, 2009
CHEMISTRY, PAPER-I
TIME ALLOWED: (PART-I) 30 MINUTES MAXIMUM MARKS:20 (PART-II) 2 HOURS & 30 MINUTES MAXIMUM MARKS:80
PART – I (MCQ)
(COMPULSORY)
Q.1. Select the best option/answer and fill in the appropriate box on the Answer Sheet. (20)
(i) Which of the following ions can act as both a Bronsted acid and base in water?
(a) −
3 HCO (b) −
4 SO (c) −
3 NO (d) N C
−
(ii) What is the bond order of F2 according to the molecular orbital theory?
(a) 1 (b) 2 (c) 4 (d) 3
(iii) Brass is an alloy of:
(a) Copper and Zinc (b) Copper and Tin
(c) Aluminum and Zinc (d) Aluminum and Copper
(iv) A 0.1 N solution of Sodium bicarbonate has a pH value of:
(a) 5.6 (b) 7.0 (c) 8.4 (d) 13.0
(v) A perpetual motion machine capable of generating increasing amounts of energy without
interacting with its surroundings can not exist. This is best explained by:
(a) First law of Thermodynamics (b) Third law of Thermodynamics
(c) Energy conservation principle (d) Gibbs-Helmholtz equation
(vi) The Schrodinger equation when solved for any system gives:
(a) The polarizability (b) The mean free path
(c) The wave function (d) The magnetogyric ratio
(vii) The number of molecules of water needed to convert one molecule of P2O5 into ortho phosphoric
acid is:
(a) 1 (b) 2 (c) 3 (d) 4
(viii) In a galvanic cell the following reaction takes place: 2H2O O2(g) + 4H++4e –
It occurs at
(a) Cathode (b) Anode (c) Cathode & Anode (d) External Conductor
(ix) For a reversible cycle, the entropy change is:
(a) Always +ve (b) Always –ve (c) Always zero (d) Dependent on the temperature
(x) In which of the following compounds Nitrogen has the highest oxidation state?
(a) NH4Cl (b) Mg3N2 (c) Na No3 (d) Na No2
(xi) Which oxide is most acidic in the following?
(a) Chlorine (I) oxide (b) Phosphorous (V) oxide
(c) Sulfur (IV) oxide (d) Germanium (II) oxide
(xii) When Hydrogen ion unites with one molecule of water to form hydronium ion? Which type of
bond is formed?
(a) Ionic (b) Non polar covalent (c) Coordinate covalent (d) Hydrogen bond
(xiii) The value of [H+ ][oH]
(a) 14 (b) 7 (c) 1 × 10-14 (d) 1× 10-7
(xiv) The addition of NH4Cl to a 1.0 N solution of NH4oH would have which one of the following
effect?
(a) Lower the pH (b) Raise the pH (c) no effect on pH (d) Release NH3 gas
(xv) Which one of the following is an ore of iron?
(a) Bauxite (b) Galena
NOTE: (i) First attempt PART-I (MCQ) on separate Answer Sheet which shall be taken back
after 30 minutes.
(ii) Overwriting/cutting of the options/answers will not be given credit.
(iii) Scientific calculator is allowed
S.No.
R.No.
CHEMISTRY, PAPER-I
(xvi) A sample of iron oxide contains 0.250 mole of iron atoms and 0.375 mole of oxygen atoms. What
is the empirical formula of the compound?
At.wt; Fe = 56, O = 16;
(a) FeO (b) Fe2O3 (c) Fe3O4 (d) FeO2
(xvii) At equilibrium the change in free energy (ΔG or ΔF) for any given reaction is:
(a) Positive and large (b) Positive and small
(c) Zero (d) Negative and small
(xviii) What is the Oxidation number of Si in 2−
6 Si F ?
(a) +2 (b) +4 (c) +6 (d) –6
(xix) Which element are more likely to form strong bases?
(a) s–block metals (b) p–block metals (c) p–block non metals (d) d–block metals
(xx) Which of the following statement is true?
(a) A catalyst modifies the enthalpy of a system
(b) A catalyst modifies the nature of the product of a reaction.
(c) A catalyst modifies the entropy of a system
(d) A catalyst modifies the activation energy of a system
PART – II
NOTE:
(i) PART-II is to be attempted on the separate Answer Book.
(ii) Attempt ONLY FOUR questions from PART-II. All questions carry EQUAL marks.
(iii) Extra attempt of any question or any part of the attempted question will not be
considered.
Q.2. (a) How Schrodinger wave equation is applied to understand the motion of the particle in the box?
(8)
(b) Define Hydrogen Bonding. Draw the structure showing hydrogen bonding in the following pure
liquids wherever possible.
(i) Hydrozine (ii) Methylalcohol (iii) Sulphuric acid (6)
(c) Write a brief note on metallic bonding (6)
Q.3. (a) Define enthalpy and discuss its relationship with internal energy. (5)
(b) Give various definitions of Second Law of Thermodynamics. (6)
(c) Write a comprehensive note on entropy. (6)
(d) Define and explain Thermochemistry. (3)
Q.4. (a) What are various allotropic forms of Carbon. Give their structures and properties. (6)
(b) Discuss role of Nitrogen Oxides in Environmental pollution. (3)
(c) Given structures of (i) PF5 ( ) - 44
-
6 SiO (iii) PCl (ii) ⎟⎠
⎞
⎜⎝
⎛
2
4 1
(d) How nitrogen is produced industrially. ⎟⎠
⎞
⎜⎝
⎛
2
6 1
Q.5. (a) How Iron is produced on Industrial Scale using “Blast Furnance”. (8)
(b) Discuss metallurgy of Aluminum. (6)
(c) Write a note on “Water pollution”. (6)
Q.6. (a) What is “Fiber Glass”. (2)
(b) Describe wet process for the manufacture of cement. What do you mean by setting of cement.
(10+2)
(c) Give the manufacture of Ammonium Nitrate. (6)
Q.7. (a) Discuss the principle involved in MO Theory. How this theory is applied to explain the
formation of a bond. (10)
(b) Compare MO Theory with Valence
(c) Draw the structure of [Co (NH3)6]Cl3 and K2 [Ni(CN)4)] (2)
Q.8. (a) Discuss various theories of Acids and Bases. (9)
(b) Write a note on Glass electrode. (7)
(c) Calculate pH of the following solutions. (4)
(i) 0.037 M HCl (ii) 0.33 M NaOH.
CSS past papers, Combined Competitive exams, FPCs papers, Fedral Public Service commission Papers, Combined Competitive Exam papers, CSS past papers, Combined Competitive exams, FPCs papers, Fedral Public Service commission Papers, Combined Competitive Exam papers, CSS past papers, Combined Competitive exams, FPCs papers, Fedral Public Service commission Papers, Combined Competitive Exam papers, CSS past papers, Combined Competitive exams, FPCs papers, Fedral Public Service commission Papers, Combined Competitive Exam papers,
No comments:
Post a Comment