Chemistry
Inter(Part-II)
Inter – A – 2012
(Objective Type)
Note: Write answers to the questions on the objective answer sheet answer sheet provided. Four possible answers  A, B , C ,D to each question are given. Which answer is correct, fill the relevant circle with pen ink to each question on the answer sheet provided.

• The number of elements classified by Newlands in the Periodic Table are :
  
  (A) 38
  (B) 62
  (C) 92
  (D) 85
  
  
• The Oxide of Beryllium is :
  
  (A) Acidic
  (B) Basic
  (C) Amphoteric
  (D) Neutral
  
  
  
•  The chemical composition of Colemanite is :
  
  (A) Ca₂B₄O₁₁.5H₂O
  (B) Ca₃B₆O₁₁.5H₂O               
  (C) Ca₃B₄O7.5H₂O
  (D) Ca₂B₆O₁₁.5H₂O
  
  
•  Which of the following Metal reacts with HNO₃:
  
  (A) Titanium
  (B) Iridium
  (C) Platinum
  (D) Magnesium
  
  
• The Anhydride of HCIO4 is :
  (A) CL₂O₃
  (B) CL₂O₇
  (C)   CL₂O₅
  (D)  CL₂O₆
  
  
• The chemical formula of Haemetite is :
  
  (A) Fe₂O₃
  (B) Fe₃O₄                   
  (C) FeO
  (D) Fe₂O₃.3H₂O
  
  
•  Which of the following donot show metamerism:
  
  (A) Ethers
  (B) Ketones                
  (C) Secondary Amines
  (D) Aldehydes
  
  
• Which type of reactions are shown by alkanes:
  
  (A) Addition
  (B) Polymerization                 
  (C) Elimination
  (D) Substitution
  
  
• The conversion of n-hexane into benzene by heating it in presence of Pt is called:
  
  (A) Isomerization
  (B) Aromatization                  
  (C)  Decarboxylation
  (D) Rearrangement
  
  
• Formaldehyde on reacting with Grignard’s reagent followed by Acid Hydrolysis gives:
  
  (A) Ethers
  (B) Carboxylic Acids
  (C)   Epoxide
  (D)  Primary Alcohols
  
  
•  According to the lewis concept ethers behaves as:
  
  (A) Acid
  (B) Base                     
  (C)  Amphoteric
  (D)  Neutral
  
  
•  Which of the following shows Silver Mirror Test:
  
  (A) Diethylether
  (B) Ethyl Alcohol
  (C) Acetaldehyde
  (D) Acetone
  
  
• CIodoform (Haloform) reaction is not shown by:
  
  (A) Ethyl Alcohol
  (B) Acetaldehyde      
  (C) Acetone
  (D) Formal Dehyde
  
  
• When Acetic Acid reacts with Ethyl Alcohol in presence of Conc.H₂SO₄, we get:
  
  (A) CO
  (B) CO₂          
  (C) HCHO
  (D) CH₃COOC₂H₅
  
  
•  Plastics are a pollution problem because many plastics are:
  
  (A) Very inflammable
  (B) Made from Petroleum                  
  (C) Burns to Toxic Fumes
  (D) Decompose to produce toxic products
  
  
•  Diammonium Phosphate contains:
  
  (A) 18% Nitrogen
  (B) 48% P₂O₅             
  (C) 85% Plant Nutrients
  (D) 10%Nitrogen
  
  
• The pH range of Acid Rain Water is :
  
  (A) 7-6.5
  (B) 6.5-6.0
  (C) 6-5.6
  (D)  Less than

Chemistry
PART-I
Time allowed: 2:40  Hours
(Subjective)
Note: It is compulsory to attempt (8) parts each from Q.No.2 and 3 while attempt 6 parts from Q .No.4 and attempt any (03) questions from part II.Write same questions no. and its part no. as given in the question paper.  22x2=44

Q.2.

• What are Periods and Groups?
  
• Give two differences of Hydrogen with Halogens.
• What are the problems faced suring the electrolysis of Brine by Diaphram Cell?
• Write down name and formula of Mineral of Lithium.
• Write balanced equations for the reactions of Al with:
  (a) Conc. H₂SO₄
  (b) N₂
• How lime Mortar is prepared? Just write equations.
• Give two methods for the preparation of Borax.
• Write down formulae of Bauxite and Cryolite.
• Write equations for the reaction of Cl2 with Hot and Cold NaoH.
• How K₂Cr₂O₇ can be converted into K₂CrO₄ and vice versa. Give equation.
• Define Isomerism giving one example.
• What are Homocyclic and Heterocyclic Compounds?

Q.3.

• Phosphorous Acid HNO₂ is a powerful reducing agent. Give two reactions to justify it.
• Give the importance of Lindler’s Catalyst.
• Ethylene Glycol is obtained by the Oxidation of Ethene .Give reaction.
• Draw the structural formulae of the :
  (a) Chlorobenzene
  (b) Phenanthrene.
• Give the chemical equations for the conversion of Benzene into Maleic acid.
• Give best method for the preparation of Alkyl Halides.
• Give general mechanism of SN₁ reaction.
• Give a chemical test to differentiate between Aldehyde and Ketone.
• Describe chemistry of Fehling’s Solution.
• Give the preparation of Nylon -6 , 6.
• Define Terpolymer with an example.

Q.4.

• Define and give examples for each Dihydric and Trihydric Alcohols.
• What do you mean by Denaturing of Alcohol?
• Why Alcohols are miscible with water?
• Phenol is acidic but Alcohol is not. Explain.
• What are essential and non essential Amino acids?
• Define Neutral Amino Acids .Give an example.
• What is need for Fertilizers?
• Write the importance of Phosphorous for the plants.
• Explain the term BOD.

Part-II

Q.5
(a) Define Ionization Energy.How it varies within a group and across a period in the periodic table?  (4)
(b)Write down any four points to show the peculiar behaviour of Lithium. (4)

Q.6
(a) Define Structural Isomerism and describe its types.
(b) Describe the two mechanisms of β – Elimination Reactions. 4

Q.7
(a) Write four chemical reactions of Alkanes.Give example in each case.          4
(b) Describe the mechanism of Cannizzaro’s Reaction. Why Acetaldehyde does not give this reaction? 4

Q.8
(a) What happens when: 4

• Benzene is heate with Conc.H₂SO₄ at 250C.
• Bromine Vapours are passed through benzene in presence of Sunlight.
• Benzene is burned in free supply of air.
• A mixture of benzene vapours and air is passed over heated V₂O₅.

(b) Write reactions when Acetic Acid reacts with : (4)
(i) Na₂CO₃
(ii) Na- metal
(iii) P₂O₅
(iv) HI/P  

Q.9
(a) Discuss Open Hearth Process to the Manufacturing of Steel. (4)
(b) Describe briefly the Purification of water.   (4)