FEDERAL BOARD 2017
PAPER CHEMISTRY PART-2
Time: 20 MM.
(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 fill the circles. Cutting or filling two or more circles will result in zero mark in that question.

• Which of the following is not present in acid rain?

1. CH₃COOH
2. HNO₃
3. H₂CO₃
4. H₂S0₄

• Which region of electromagnetic spectrum is involved in NMR spectroscopy?

1. Radio ways
2. Ultraviolet
3. Visible
4. Microwaves

• Which of the following compounds gives as acidic solution with water?

1. BaCl₂
2. SiCl₄
3. NaCI
4. KCl

• When a Complex reflects back whole of white light, its color will be:

1. Green
2. Red
3. White
4. Black

• Which of the following oxide is used as a Catalyst in contact process?

1. V₂O₅
2. P₂O₃
3. Fe₂O₃
4. Mn₂O₃

• Full name of Bucky Balls is:

1. Buckminster Carbines
2. Buckminster Abbey
3. Buckministernes
4. Buckminster Fullerenes

• Which of the following alcohols will be most easily dehydrated to give an alkene

1. 3-propanal
2. 2-methyl-2-propanol
3. 1-propanol
4. 2-propanol

• Benzoic acid is obtained by the oxidation of

1. p Xylene
2. m-Xylene
3. Benzene
4. Toluene

• Which of the following alkyl halides cannot be formed by direct reaction of alkanes with halogen?

1. RI
2. RF
3. RBr
4. RCl

• When phenol reacts with CH₃COC1 the product formed is:

1. Ethanol
2. Ethanol
3. Ether
4. Easter

• Which of the following can undergo Aldol condensation reaction?

1. Benz aldehyde
2. Trimethylacetaldehyde
3. Formaldehyde
4. Acetaldehyde

• IUPAC name of Valerie acid is:

1. Propanoic acid
2. Ethanoic acid
3. Pentanoic acid
4. Butanoic acid

• Hydrolysis of nitriles produces:

1. TNT
2. Carboxylic acids
3. Nitrates
4. Nitroalkanes

• Most abundant macro molecules on earth are:

1. Carbohydrates
2. Olive oils
3. Lipids
4. Vitamins

• Which of the following is a trace mineral in human diet?

1. Potassium
2. Calcium
3. Zinc
4. Sodium

• Petrochemicals are classified into how many classes?

1. Three
2. Four
3. one
4. Two

• Ozone layer is present at a height of about:

1. 80 km above the earth
2. 100 km above the earth
3. 5 km above the earth
4. 28 km above the earth

FEDERAL BOARD 2017
PAPER CHEMISTRY PART-2
Time: 3:10 Hours
(Subjective Part)
Marks: 83
Section-B

Q.2 Answer any FOURTEEN parts. The answer to each part should not exceed 5 to 6 lines.

• Na,Si and Cl are present in the same period of the periodic table but they have different melting points. Why?
  
• Salts of Be²⁺can have four water molecules as water of crystallization. Explain how Be²⁺ is associated with four water molecules.
  
• What is Ligand? Give an example of a tridentate and a hexadentate ligand?
  
• How are chromate and dichromate ions interconverted to one another? Writes balance equation to show this inter conversion and mention the color change during this inter conversion.
  
• State and explain the Morkownikov's rule.
  
• What are optical isomers? Draw enantiomers of lactic acid.
  
• Write the reaction equations for the preparation of following compounds using Methyl magnesium bromide.
  (a) Ter — butyl alcohol
  (b) Acetic acid
  
• Explain the acidic oxidation of Cumene.
  
• Write the equations of reaction of 2,4 -DNPH with following compounds:
  (a) Acetaldehyde
  (b) Acetone
  
• What is Fischer esterification? Give an example. Write the name of an ester used as orange flavor
  
• Write the names of following compounds:
  (a) N₂O OH NO₂NO₂
  (b) CH₃ CH₃
  (c) (CH₃)₂C = C(CH₃)
  
• How open chain structure of glucose converted to its cyclic forms?
  
• Define the following:
  (a) Inhibitors
  (b) Lipids
  (c) Saponification
  
• Which functional groups are used as chromophore and auxochromes in azo dyes? Give name of two azo dyes.
  
• Give the composition of following cosmetics:
  (a) Nail polish
  (b) Nail polish remover
  
• Write the sources and environmental effects of following pollutants:
  (a) Ozone
  (b) PAN
  (c) Oxides of Sulphur
  
• What is the role of leather tanneries in water pollution? What health problem can be caused by this? Pollutant? How can we control this pollutant?
  
• What is combustion analysis? Give its drawback.
  
• What is mass spectrometer? How various ions are produced in a mass spectrometer?

Section-C

NOTE: Attempt any TWO questions. All questions carry equal marks.

3 a. Discuss the effect of heat on Carbonates and Nitrates of alkaline earth metals.
b. Whet are coordination compounds? Give an example of a positively charged complex, a negatively charged complex and a neutral complex along with their IUPAC name.
c. How would you prepare Lassaigne's solution? For what purpose is it used?

Q.4 a. Discuss the mechanism of Sulphonation of benzene,
b. What is Cannizoro’s reaction? Explain the mechanism of this reaction using a suitable example.
c. Starting from acetylene how would you prepare the following compounds?
(i) Acetaldehyde
(ii) 1,1,2,2 -tetrabromo ethane

5 a. How does an enzyme work? Using labelled diagrams explain two mechanisms of enzyme action.
b. What is a condensation polymer? Explain the formation of Nylons—6,6 using chemical equation.
c. What is industrial smog? Write the conditions for development of photochemical smog.