Lahore Board 2016
Chemistry
Inter Part-II
Time:20 minutes
Group-II
Marks:17
(OBJECTIVE TYPE)

Note: Four possible answers A,B,C and D to each question are given. The choice which you think is correct, fill that circle in front of that question with marker or pen ink in the answer book. Cutting or filling two or more cirlcles will result in zero mark that question.

• Which of the following noble gas is used for arc welding and cutting:

(a) Helium
(b) Xenon
(c) Argon
(d) Radon

• Banana flavor is given by the ester:

(a) Octyl Acetate
(b) Amyl butyrate
(c) Amyl acetate
(d) Ethyl butyrate

• Mid steel contains carbon percentage:

(a) 0.1%-0.2%
(b) 0.3%-0.7%
(c) 0.7-1.5%
(d) 1.6-2.0%

• Which compound will have maximum repulsion with H₂o:

(a) C₆H₆
(b) C₂H₅OH
(c) CH₃-CH₂-CH₂-OH
(d) CH₃-O-CH₃

• Which of the following can be used as catalyst in Friedel-Crafts reactions:

(a) HNO₃
(b) NACL
(c) BeCl
(d) AlCl

• Which of the following form amphoteric oxide:

(a) Na
(b) Mg
(c) O₂
(d) Zn

• To avoid the formation of toxic compounds with chlorine which substance is used for disfecting water:

(a) KMnO₄
(b) Ozone
(c) Alums
(d) Urease

• Which one of the following enzymes brings about the hydrolysis of fats:

(a) Lipase
(b) Zymase
(c) Maltase
(d) Urease

• Main pollutant of leather tanneries in waste water is:

(a) Lead
(b) Chromium
(c) Copper
(d) Iron

• Point out the elemant which forms super oxide:

(a) Li
(b) Na
(c) K
(d) C

• Presence of a double bond in an organic compound is the sign of:

(a) Saturation
(b) Substitution
(c) Unsaturation
(d) Halogenation

• In primary alkyl haldes the halogen atom is attached to a carbon which is further attached to how many carbon atoms:

(a) Four
(b) Three
(c) Two
(d) One

• Which woody raw material is used for the manufacture of paper pulp:

(a) Cotton
(b) Bagasse
(c) Poplar
(d) Rice straw

• Cannizarro’s raction is given by:

(a) Acetaldehyde
(b) Formaldehyde
(c) Pronanal
(d) Propanone

• Among the elements of VA group which has hsghest ionization energy:

(a) Nitrogen
(b) Phosphorus
(c) Antimony
(d) Bismuth

• SH function group is called:

(a) Cyano
(b) Mercapto
(c) Nitro
(d) Carboxyl

• Which metal is used in thermite process:

(a) Iron
(b) Copper
(c) Aluminium
(d) Zinc

Lahore Board 2016
Chemistry
Inter Part-II
Time:3:10 hours
Group-II
Marks:83

(SUBJECTIVE TYPE)
SECTION-I

2. Write short notes on any Eight (8) questions: (16)

• Oxidation state usually remains the same in a group why?
• Give any two resemblances of hydrogen with group IV A.
  
• Give formula of: (i)Natron, (ii) halite
• Give any two points of difference of be with its family members.
• Give any two uses of sodium silicate.
• How borax can be prepared from colemanite? Give equation.
  
• SO₃ dissolved in H₂SO₄ and not in water why?
  
• Write names and formula of oxyacids of nitrogen.
• What is iodized salt?
• Write any two uses of krypton
• What is chromyl chloride test? Write chemical equation.
  
• Define sacrificial corrosion.

3. Write short notes on any Eight (8) questions: (16)

• What are alicyclic compounds, give two examples.
• Write the functional group of aldehyde and ketone, give one example of each.
  
• Define markownikov’s rule, give its one example.
• How acetylene is converted into benzene, write its equation?
• Write the mechanism of nitration reaction of benzene,
• How benzene is converted into maleic acid by catalytic oxidation?
  
• Starting from C₂H₅Br how will you prepare ethane and ethane.
  
• How will you repare diethyl ammine from C₂H₅Br?
  
• How will you distinguish between methanol and ethanol by one test?
• Write any four uses of ethyl alcohol.
• What is the role of chlorofluorocarbons in destroying ozone?
  
• What is depolymerization of plastic and where it is used?

4. Write short notes on any six (6) questions: (12)

• Describe preparation of formalin on commercial scale from methyl alcohol.
• Tollen’s test is also called silver mirror test.justify it.
  
• Define wth example neutral amino acids.
• How carboxylic acids are converted into a-amino acids?
• Define with example condensation polymerization.
• State saponification number.
  
• What do you mean by the rancidity of oil and fats?
  
• What is a need for fertilizers?
• What do you mean by prilling of urea?

SECTION-II
Note: Attempt any three questions:

5. (a) write two similarities and two dissimilarities of hydrogen with IV A group elements.

(b)Describe the role of lime in industries.

6. (a) write a method of preparation of water glass. also write uses of water glass.

(b)Write uses of neon and argon.

7.(a) describe sp hybridization. Explain it with the example of ethyne.

(b)Describe the β elimination reaction “E₂” with example.

8. (a) write the chemical reaction of ethane with the following:
(i)HCL
(ii) Br₂
(iii) O₃
(iv) HOX

(b) Write any four uses of acetaldehyde.

9. (a) write any four different chemical methods for preparation of benzene.

(b) Write the chemical reaction of phenol with following:
(i) NaOH
(ii) Zn
(iii) CH₃COCL
(iv) H₂

SECTION-III (practical part)
Note: Attempt any three questions.

• Write complete qualitative analysis for basic radical (AL)³⁺ aluminium in a systematic manner.
• Write complete qualitative analysis for basic radical (Ba²⁺) barium in a systematic manner.
• Write complete qualitative analysis for acid radical (HCO^-₃) bicarbonate in a systematic manner.
• How will you identify and confirm carboxylic acid (COOH) functional group in the given organic compound?
• Write the material/chemicals, chemical equation and procedure for production of aspirin.