Federal Board HSSC-I (2015)
CHEMISTRY HSSC-II
Part -2
Time allowed: 25 Minutes
(Marks 17)
SECTION-A
NOTE:- Section-A is compulsory. All parts of this section are to be answered on the question paper itself. It should be completed in the first 25 minutes and handed over to the Centre Superintendent. Deleting/overwriting is not allowed. Do not use lead pencil. Qi. Circle the correct option i.e. AIB/CID. Each part carries one mark.

• The decrease in ionization energy of Alkali Metals from top to bottom in a group is due to:
  A) Shielding effect and Nuclear charge
  B) Atomic size and Nuclear charge.
  C) Shielding effect and Atomic size
  D) None of these
•  Which of the following reacts with Alkali to give Hydrogen gas?

A) Be
B) Mg
C) Ca
D) Ba

•  Borax, Colemanite and Orthoboric acid are the common minerals of:

A) Aluminum
B) Boron
C) Sodium
D) Calcium

• In contact process the catalyst used is:

A) Fe201
B)V205
C)SO3
D)Ag2O

• The decrease in oxidizing power of Halogens down the group is according to which of the   following order?

A. F2 > Cl1 > Br2 = I2
B. F2 > Cl2 = Br2 > I2
C. I2 > Cl2 > Br2 > F2
D. F2 > Cl2 > Br2> I2

• Which of the following is non-typical transition element?

A. Cr
B. Mn
C. Zn
D. Fe

• Which of the following compounds reacts with HBr obeying Markownikov's rule?

•    In SN1 reaction:

A. Retention of configuration does not take place
B. Inversion of configuration does not take place
C. Both retention and inversion of configuration take place
D. None of these

• The product formed on reaction Ethanol with SOCl2 in the presence of pyridine is:

A. Chloroethanol
B. Chloroethane
C. Chloroethanal
D. Both A and C

• Epoxy resins belongs to:

A. Thermosetting polymers
B. Thermoplastic polymers
C. Biopolymers
D. None of these

• CH3Cl+KCN Alcohol > (A) H+/H2O > (B) The end product (B) of the above reaction is:

A. HCOOH
B. CH3NH2
C. CH3COOH
D CH3OCH3

• Which of the following is NOT a Nitrogenous fertilizer?

A. Ammonia
B. Urea
C. Ammonium Nitrate
D. Calcium Super Phosphate

• The pH range of acid rain is:

A. 7.0-6.5
B. 6.5-6.0
C. 6.0-5.6
D. Less than 5.0

   15.  In

•   Total number of di-substituted products obtained from Benzene is:

A. 2
B. 3
C. 4
D 5

• 
  Choose the structure of carbolic acid:

(Subjective Part)
SECTION-B

The answer to each part should not exceed 5 to 6 lines. (14x3=42)
Q.2 Answer any FOURTEEN parts.

(i) a. ZnO is amphoteric oxide. Justify this statement by providing two chemical reactions
b. Describe the resemblance of Hydrogen with the elements of Group 1A of periodic table. (Any two points)
(ii)  a. What is Milk of Magnesia?
b. Give the chemical reactions which take place during the hardening of mortar.
(iii) a. Describe the effect of heat on Boric acid with the help of two chemical equations.
b. Write down the chemical formula of soap stone.
(iv) a. Nitrous acid (HNO2) behaves as oxidizing as well as reducing agent. Provide two chemical equations showing this behaviour of HNO2.
b. Complete the following reaction: 2H3PO4 240 °C > (……) 316 °C> (……)
(v) a. keeping in mind the system of nomenclature of oxyacids name the following compounds:

• HCI
• HCIO2
• HCIO
• HCIO4

b. Xenon tera-fluoride can be used as fluorinating agent. Give a chemical reaction which shows this behaviour.
(vi) a. Give systematic (IUPAC) names of the following complex compounds:

1. [PtCI(NO2)(NH3)4]SO4
2. K4Fe(CN)6]

b. What is the difference between Wrought Iron and Cast Iron?
(vii) a. Define functional group. Give structures of two nitrogen containing functional groups.
b. What are Heterocyclic compounds? Give structures of any one heterocyclic compound.
(viii) a. Give the structural formulae of the following compounds:

1. 4,5-Dimethyl-2-hexene
2. Isopentane

b. Which Alkene gives Formaldehyde as the only product after Ozonolysis? 01
(ix)a. Give IUPAC names of the following:

 b. Give name and structure of the product of the following reaction:
C6H6+CH3COCl AlCl3  > ?
(x) How will you synthesize the following compounds starting from CH3 - CH2 -Mg- Br?
a. Propanoic Acid
b. 1-Propanol
c. 2-Butanol
(xi) a. Describe the acidic behaviour of Phenol.
b. Arrange the following in decreasing order of acidity:

• Alcohol
• Phenol
• Carboxylic acid
• Water
• a. Define condensation reaction.

b. Give chemical equation which involves the reaction of 2 moles of Acetaldehyde in the presence of NaOH. Also name the chemical reaction.
(xiii) a. What is Glacial Acetic Acid?
b. How Alanine can be prepared by Ethanal? Also give the name of the reaction.
(xiv) a. Name the major classes of organic compounds in wing cell.
b. Define the term lipids. .
c. What are the primary building blocks of lipids?
(xv) a. What is meant by Prilling of Urea?  
b. Why is cement often called Portland cement?  
(xvi) Explain the following terms:
a. Biochemical Oxygen Demand (BOD)
b. Chemical Oxygen Demand (COD)
(xvii) a. Write down the chemical reactions involved in the preparation of Ethanol from Starch.
b. Absolute Alcohol cannot be obtained by Fermentation process. Give reason.
(xviii) a. Give two applications of Argon.
b. Write down the chemical reactions of Tin •with: 01 (i) HNO3(dil) (ii) HNO3(conc)
(xix) Why do the transition metals give coloured compounds? Explain with an example.

SECTION-C
(Marks 26) 

Note: Attempt any TWO questions. All questions carry equal marks. (2 x13 = 26)
Q.3 a. Point out the factors causing peculiar behavior of Fluorine.
b. Explain sacrificial corrosion.
c. Describe the preparation of Sodium (Na) metal, by DOWN'S CELL.
Q.4 a. Describe the preparation of Ethyne by Kolbe's Electrolysis.
b. Point out the differences between SN1 and SN2 reactions.
c. Write the names and structures of the Monomers of the following Polymers:
(I) PVC (ii) Nylon-6, 6 (iii) Polystyrene
Q.5 a. Explain the following terms:

• Hydrosphere
• Incineration of the Municipal Solid Waste

b. Write down any three essential qualities of a good Fertilizer.
c. Explain Addition Polymerization with mechanism.