Inter (Part-II) Sahiwal Board 2015
Chemistry
Part II (Objective Type)
Time Allowed: 20 Minutes 
Max. Marks: 17

Note: You have four choices 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.

Question #1
Circle the correct option i.e. A/B/C/D. Each part carries one mark.

• Coordination number of Pt in [PrC(NO₂)(NH₃)₄] Is:

(a) 2
(b) 4
(c) 1
(d) 61

• The state of hybridization of C in ethane is:

(a) sp²
(b) sp
(c) sp³
(d) dsp²

• Which catalyst is used in Friedel Craft's reaction:

(a) AlCl₃
(b) BeCl₂
(c) NaCl
(d) HNO₃

• Which compound has acidic hydrogen:

(a) butane
(b) 1-butane
(c) 1-butyne
(d) 2-butyne

• S_N2 reaction can be best carried out with:

(a) Primary alkyl halides!
(b) Secondary alkyl halides
(c) Tertiary alkyl halides
(d) All of these

• Which compound is called universal solvent:

(a) CH₃OH
(b) C₂H₅OH
(c) CH₃OCH₃
(d) H₂O

• Isopropyl alcohol on oxidation gives:

(a) Acetaldehyde
(b) Acetone'
(c) Ether

• Which of the following has best boiling point:

(a) Methanal
(b) Ethanol
(c) Propanal
(d) 2- hexanone

• Acetic acid is manufactured by:

(a) Distillation
(b) Fermentation'
(c) Ozonolysis
(d) Esterification

• Which of the following elements is not present in all proteins:

(a) Carbon
(b) Hydrogen
(c) Nitrogen
(d) Sulphur

• Phosphorus helps the growth of:

(a) Root
(b) Leaf
(c) Stem
(d) Seed

• Which one is the most toxic:

(a) Carbon
(b) COI
(c) CO₂
(d) SO₂

• The hydrides of group I-A are:

(a) Ionic
(b) Covalent
(c) Metallic
(d) Interstitial

• Nelson's cell is used to prepare:

(a) NaOH
(b) Na₂CO₃
(c) Na metal
(d) NaC

• The aqueous solution of borax is:

(a) Acidic
(b) Alkaline
(c) Amphoteric
(d) Neutral

• Oxidation of NO In air produces:

(a) N₂O
(b) N₂O₃
(c) N₂O₄
(d) N₂O₅

• Hydrogen bond is strongest between the molecules of:

(a) HF
(b) HBr
(c) HCI
(d) HI

Inter (Part-II) Bahawalpur Board 2015
Physics
Part I (Subjective)
Time Allowed: 2.10 Hours 
Max. Marks: 83 

Section I

Note: Section 1 is compulsory. Attempt any Three questions from Section II and any Two parts from Section III.

2.Write short answers to any eight parts: ( 6 x2 12)

• m.p, B.p of short periods increases upto middle of period and then decreases. Why?
• Give similarities of hydrogen with alkali metals.
• Give definition of allotropy. Write allotropes of phosphorus.
• How H₃P0₄ is prepared on large scale?
• Define aromatic compounds. Give an example.
• Write isomers of butane.
• Write excellent method to prepare alkyle iodide.
• Define leaving group. Give one example.
• Write formulas of malonic acid and phthalic acid.
• Why B.P of carboxylic acid are relatively high?
• Draw flow sheet for manufacture of urea.
• What are phosphatic fetilixers? Give two formulas of phosphatic fertilizers.

3. Answer briefly any eight parts from the followings: (8x2 16)

• Give reasons that alkali metals are strong reducing agents.
• Why the aqueous solution of Na₂CO₃ is alkaline in nature?
• Halogens are strong oxidizing agents. Justify.
• Show that reaction of chlorine with NaOH in the cold state is disproportionation reactions.
• Benzene can be prepared commercially from acetylene. Give reaction with conditions.
• How do you distinguish between ethane and ethyne?
• How chlorobenzene is converted into phenol?
• Write the reaction of phenol with methanol.
• What is saponification number?
• Write any two differences between DNA and RNA.
• What is photochemical smog? Give its properties.
• What is BOD?

4.Answer briefly any six parts from the followings: (6x2 =12)

• What is the chemistry of borax bead test?
• Why is CO₂ a gas at room temperature while SiO₂ is a solid?
• Write the uses of K₂Cr₂O₇,?
• What is sacrificial corrosion?
• Write down the formula of aniline and benzaldehyde.
• What are monocyclic and polycydie aromatic hydrocarbons?
• What is the silver mirror test?
• How -hydroxy acid is prepared from aldehydes?
• Write down four uses of formaldehyde.

SECTION-II

Note: Attempt any three questions.

Question #5
(a) Write a note on oxides of Alkali and alkaline earth metals.
(b) Write a note on acidic character of alkynes.

Question #6
(a) What are silicones? Write uses of silicones.
(b) Write the mechanism of nitration and alkylation of benzene.

Question #7
(a) What happen when dil HNO₃ and conc.HNO₃ react with following? (i) Cu (ii) Hg (iii) Sn (iv) Zn
(b)How would you prepare the following compounds starting from Grignard's reagent? (i) alkane (ii) carboxylic acid (iii) 2-butanol (iv) 1-butanol

Question #8
(a) How bleaching powder is prepared? Give its uses.
(b) How will you distinguish between primary, secondary and tertiary alcohols? Explain with reactions.

Question #9
(a) Write a note on sp — hybridization.
(b) Give uses of Acetaldehyde.

SUBJECTIVE PART-III

Attempt any two Questions. Each question has (5x2 10) marks.

Question #10
(a) How Ni⁺² is qualitatively analysed systematically?
(b) How Ba⁺² is analysed qualitatively in a systematic way?
(c)(i) How S₂O^-2₃ is analysed qualitatively in a proper way? (ii) How palm test is performed?
(d) How nitrogen and Sulphur are detected in organic compound in a systematic way?
(e) Write the material required, equation and procedure for the preparation of aspirin.