(Chemistry New Scheme)
Paper II (Objective)
Time: 20 Minutes
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 with marker or pen on the answer book provided. Cutting or filling two or more circles will result in zero mark in that question. Attempt as many questions as given in objective type question paper and leave others blank.

• Which halogen will react spontaneously with Au (s) to produce Au3³⁺

(A) Br₂
(B) F₂
(C) l₂
(D) CE₂

• The brown gas formed, when metal reduces HNO₃ to

(A) NO
(B) NO₂
(C) N₂O₂
(D) N₂O₅

• The chief ore of aluminium is

(A) Na₂ AtF₆
(B) Al₂O₃.2H₂O
(C) Al₂O₃
(D) Al₂O₃.H₂O

• The oxides of beryllium are

(A) Acidic
(B) Basic
(C) Amphoteric
(D) None of these

• Mark the correct statement.

(A) Cℓ is smaller than Cℓ atom.
(B) Cℓ^- (ion) and Cℓ (atom) are equal in size
(C) Na⁺ is smaller than Na atom
(D) Naℓ is larger than Na atom

• Smaller the size of an ion

(A) lesser is the degree of hydration
(B) lesser is the polarizing power
(C) greater is the electron affinity
(D) greater is the degree of hydration

• The newspaper can bc recycled again and again as many times as

(A) 5
(B) 3
(C) 4
(D) 2

• Phosphorus helps the growth of

(A) Roots
(B) Leave
(C) Stern
(D) Seed

• The fibre which is made from acrylonitrile as monomer is

(A) Acrylic fibre
(B) Nolyester fibre
(C) PVC
(D) Rayon fibre

• The solution of which acid is used for seasoning of food?

(A) Benzoic acid
(B) Butanoic acid
(C) Formic acid
(D) Acetic acid

• Cannizzaro's reaction is not given by

(A) Formaldehyde
(B) Acetaldehyde
(C) Benzaldehyde
(D) Triethyl acetaldehyde

• Elimination bimolecular reaction involves

(A) First order kinetics
(B) Second order kinetics
(C) Third order kinetics
(D) Zero order kinetics

• Methyl alcohol is not used

(A) As a solvent
(B) As an antifreezing agent
(C) as a substitute for petrol
(D) for denaturing of ethyl alcohol

• During nitration of benzene, the active nitrating agent is

(A) NO₃
(B) NO²⁺
(C) NO₂
(D) HNO₃

• Synthetic rubber is made by polymerization of

(A) Chloroform
(B) Acetylene
(C) Divinyl acetylene
(D) Chloroprene

• In t-butyl alcohol, the tertiary carbon is bonded to

(A) Three hydrogen atoms
(B) Two hydrogen atoms
(C) One hydrogen"' atom
(D) No hydrogen atom

• The strength of binding energy of transition elements depends upon

(A) Number of electron pairs
(B) Number of unpaired electrons
(C) Number of neutrons
(D) Number of protons

GUJRAWALA BOARDR 2014
PAPER CHEMISTRY
PART-II
Marks: 83
Time: 3:10 hours
(Subjective Part)
Section II

2. Write short answers to any EIGHT questions. (8x2 = 16)

• "Ionization energy increases from left to right in a period". Justify the statement.
• How do you justify that ZnO is amphoteric in nature?
• How lime mortar is prepared? Explain with chemical equations.
• Give reactions of Al with (a)NaOH (b)H₂SO₄
• How weathering of potassium feldspar takes pike? Give chemical equation also.
• Discuss use of PbCrO₄ in paints.
• N₂O supports combustion". Give two reactions in favour or the statement.
• P₂O₅ is a powerful dehydrating agent, prove by giving two examples.
• Give ibur use's 'of sulphuric acid.
• How bleaching powder is prepared by Hasenclever's method?
• Describe factors of acidic strength of oxyacids of halogens.
• Give four uses of "Noble Gases".

3. Write short answers to any EIGHT questions:. (8x2 = 16)

• What is the cause of paramagnetic behavior?
• Define central metal atom or ion:
• What are carbocylic compounds?
• When does sp-hybridization occur?
• What is heat of combustion?
• What is Raney-Nickle? Where is it used?
• Define A1dol condensation,
• Give any two uses of formaldehyde,
• What is sodium bisulphite. test?
• What is meant by rancidity of fats and oils?
• Define iodine number.
• What are macromolecules? Give two examples.

4. Write short answers to any SIX questions: (6×12=24)

• What is Wurtz-Frittig reaction?
• Give mechanism Of S_N reactions
• How ethanol is prepared on industrial scale in the world? Give one method
• Phenol behavior as acid. Explain.
• What is the role of decomposition and burning, zones in the manufacturing of cement?.
• How urea is prepared from ammonia?
• What are the requirements of a fertilizer?
• What is lithosphere?
• What are the causes of water pollution?

(SECTION-II)

5.(a) Discuss the position of hydrogen over VII A-Group elements.
(b) Write any four points of peculiar behaviour of lithium.

6.(a) Explain reforming of petroleum with the help of a suitable example. 4
(b) Discuss briefly the two possible mechanisms or ᵦ- elimination reactions.

7.(a) How will you convert ,'Ethene' into

• Dibromo ethane
• Formaldehyde
• Ethylene glycol
• Ethane
  

(b) How would you prepare carboxylic acid from primary Alcohols and aldehydes?

8.(a) Write down four methods for the preparation of benzene
(b) Convert methanol to ethanol and ethanol to methanol.

9.(a) Flow pesticides are dangerous to human beings? Comment.
(b) How does potassium permanganate react with the following?

• H₂
• FeSO₄
• Oxalic acid
• KOH

Section- IV

Write any three question. (5×3=15)

• Write any two confirmatory tests for SO₄ radical.
  Describe "ring test" and its chemical equation.

• Give any two confirmatory tests for Al³⁺
  Name any two radicals for which filter ash test is performed

• Write down two confirmatory tests for CO₂
  What is borax bead text?

• Write down material, chemical equation and procedure for the preparation of Aspirin.

• Haw will you detect N and X in the given organic compound?