FAISALABAD BOARD 2016
PAPER CHEMISTRY PART-II
Time: 20 Min.
(Objective Part)
Marks: 17
Note: You have four choice for each objective type question as A, B, C and D The choice which you think is correct; fill that circle in front of that question number. Use marker or pen to Jill the circles. Cutting or fillign two or more circles will result in zero mark in that question.

Question#1

•  Which compound is the most reactive one?
  
  (a) Benzene
  (b) Ethene
  (c) Ethane
  (d) Ethyne

• Which is not a nucleophile?
  
  (a) H₂O
  (b) H₂ S
  (c) BF₃
  (d) NH₃

• Rectified spirit contains alcohol about:
  
  (a) 80%
  (b) 85%
  (c) 90%
  (d) 95%

• Ketons are prepared by the oxidation of:
  
  (a) Primary alcohol
  (b) Secondary alcohol
  (c) Tertiary alcohol
  d) Methanol

• Which is not a fatty acid?
  
  (a) Propanoic acid
  (b) Acetic acid
  (c) Phthalic acid
  (d) Butanoic acid
  
  
• Which is a water soluble vitamin?
  
  (a) Niacin
  (b) Riboflavin
  (c) Trypsin
  (d) Ascorbic acid
  
  
• How many zones through which the charges pass in rotary kiln?
  
  (a) 4
  (b) 3
  (c) 2
  (d) 5
  
  
• Newspaper can be recycled again and again how many times:
  
  (a) 2
  (b) 3
  (c) 4
  (d) 5

• Which gas is cause of asthma?
  
  (a) O₃
  (b) O₂
  (c) SO₂ 
  (d) CO₂
  
  
• The radius of I. ion is
  
  (a) 72pm
  (b) 136pm
  (c) 99pm
  (d) 181 pm
  
  
• The mineral CaSO₄.2H₂O has the general name:
  
  (a) Gypsum
  (b) Dolomite
  (c) Calcite
  (d) Epsom salt
  
  
• The chief ore of Al is:
  
  (a) Na₃AlF6/'
  (b) Al₂O₃, 2H₂0
  (c) Al₂O₃
  (d) Al₂O₃, H₂0
  
  
• Which specie has the maximum number of unpaired electrons?
  
  (a) O₂
  (b) O₃
  (c) D₂O
  (d) D₃O
  
  
• Which is the strongest acid?
  
  (a) HClO
  (b) HCeO₂
  (c) HClO₃
  (d) HC104
  
  
• Coordination number of Pt in [PECE(NO2)(NHAl₂)]
  
  (a) 2
  (b) 4
  (c) 1
  (d) 6
  
  
• Ether shows the phenomenon of:
  
  (a) Position isomerism
  (b) Functional group isomerism
  (c) Metamerism
  (d) Nothing
  
  
• If 3 dichloroethylsulphide is commonly known as:
  
  (a) Mustard gas
  (b) Laughing gas
  (c) Phosgene gas
  (d) Bio gas

Time:3.10 Subjective
Marks: 83
Section I

2. Attempt any EIGHT short questions. (8 x 2 = 16)

• How do you remove the entrapped gases from the steel?
• Discuss d-block and f-block elements are called transition elements.
• Give two important applications of helium.
• Why HF is a weaker acid than HU?
• Prove that P205 is the dehydrating reagnet.
• What are silicones?
• Why is CO₂ a gas at room temperature while SO₂ is a solid?
• Why Iiine water turns milky with CO but becomes clear with excess CO₂ ?
• Why ti e aqueous solution of Na₂CO₃ is alkaline in nature?
• Write my two similarities of hydrogen with group IVA.
• The ionic radius of positive ion is smaller than its parent atom. Give reason.

3. Attempt any EIGHT short questions. (8 x 2 = 16)

• What are main sources of organic compounds?
• Give formulas of cyclopropane and toluene.
• Sigma bond is relatively inert why?
• What is Raney-Nickel and for what it is used?
• Why hydroxyl group (OH) is ortho and para directing?
• Benzene is less reactive than ethene. Why?
• Define nucleophile and electrophile.
• Write equation for reaction of Grignard's reagent with ethylene epoxide.
• Draw flow sheet diagram for manufacture of methanol.
• What is meant by denaturing of alcohol?
• Define BOD.
• What is smog?

4. Attempt any SIX short questions. (6 x 2 = 12)

• Write industrial method for preparation of acetaldehyde by equation.
• Write the chemical reaction of H₂NOH with ethanol and propanone in the presence of acid.
• How acetic acid is prepared by the oxidation cleavage of 2-butene?
• What is Zwitter ion? How it is formed?
• Write major uses of epoxy resin.
• Derive the open chain structure of fructose.
• Define saponification. Give reaction.
• What is the function of potassium fertilizers in plants?
• Which type of calcarious raw material is used in cement?

SECTION-II:

Attempt any TIIREE questions.

Question#5
(a) Discuss oxidation state of different elements in the periodic table.
(b) Give peculiar behaviour of Be from other family elements.

Question#6
(a) Define semi-conductors. Give example. Write two properties and two uses of semi-conductors.
(b) Write the applications of noble gases.

Question#7
(a) Explain sp2 -hybridization with an example.
(b) Give reactions of ethyl magnesium bromide with
(i) HCHO
(ii) CH₃CHO
(iii) (CH ₃)₂ CO
(iv) ClCN

Question#8
(a) Write a note on the acidity of ethyne.
(b) Give mechanism of the reaction of phenyl hydrazine with acetone.

Question#9
(a) Give mechanism of nitration and sulphonation of benzene.
(b) How ethyl alcohol can be prepared by fermentation process?

SECTION-111:

10. Attempt any THREE questions. (5 x 3 = 15)
(a) Write complete qualitative analysis of Al⁺³ radical in a systematic manner.
(b) Write complete qualitative analysis of Nat' radical in a systematic manner.
(c) Write complete qualitative analysis of CV' radical in a systematic manner.
(d) How will you identify and confirm the carboxylic functional group in an organic compound?
(e)Write the material required, chemical equation and procedure for preparation of iodoform.Cis-transisomerism