(I2th CLASS - 2014)
CHEMISTRY
GROUP FIRST
TIME: 20 MINUTES
NEW COURES
MARKS: 17
OBJECTIVE
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

• Which of the following statement is correct?
  
  (A) Na atom is smaller than Na⁺
  (B) Na atom is larger than K
  (C) F atom is smeller then F^o
  (D) F atom is larger than F^o
  
  
• Which of the following elements form acidic oxide only
  
  (A) Cd
  (B) Al
  (C) Sn
  (D) Br
  
  
• Which of the following do not form oxide of Nitrogen on heating
  
  (A) LiNO₃
  (B) NaNO₃
  (C) Ca(NO₃)
  (D) Mg(NO₃)₂
  
  
• If the temperature dropped from 100 °C to 0⁰C, the viscosity of petroleum oil may
  
  (A) Increase four times
  (B) Decrease four times
  (C) Increase 100 times
  (D) Decrease 100 times
  
  
• Which of the following contain 48 % oxygen
  
  (A) SIO₂
  (B) BaCO₃
  (C) CaCO₃
  (D) H₂O₂
  
  
• Which of the following is the strongest acid in solution?
  
  (A) HE
  (B) HCI
  (C) HBr
  (D) HI
  
  
• Which of the following has greatest number of unpaired electrons?
  
  (A) Fe
  (B) Fe⁺²
  (C) Mn₊₂
  (D)Cr⁺³
  
  
• Which of the following is an amide?
  
  (A) (NH₂)₂C0
  (B) NH₂CH₃
  (C) C₆H₅NH₂
  (D) N(CH₃)₃
  
  
• Synthetic rubber is made by polymerization of
  
  (A) Acetylene
  (B) Divinyl acetylene
  (C) Chloroprene
  (D) Vinyl acetylene
  
  
• M Chlorinator benzene is prepared by
  
  (A) Nitration of Chloro benzene
  (B) Nitration of Benzene
  (C) Chlorination of nitrobenzene
  (D) Nitration of m-Chloro benzene
  
  
• Which of the following is not a nucleophile?
  
  (A) H₂S
  (B) H₂O
  (C) BF₃
  (D) NH₃
  
  
• Which of the following is weakest acid?
  
  (A) Phenol
  (B) Benzoic acid
  (C) Ethyl alcohol
  (D) Water
  
  
• Aldehydes and Ketones can be detected by
  
  (A) 2,4 —DNP test
  (B) Tollen's test
  (C) Sodium Nitropruside test
  (D) Benedicts solution test
  
  
• Which of the following is not directly prepared from CH₃C00H
  
  (A) Ethyl acetate
  (B) Acetyl Chloride
  (C) Acetic anlydride
  (D) Acetamide
  
  
• Starch is
  
  (A) Monosaccharide
  (B) Disaccharide
  (C) Polysaccharide
  (D) Oligosaccharide
  
  
• Ammonium Nitrate fertilizer is not useful for
  
  (A) Wheat
  (B) Cotton
  (C) Sugarcane
  (D) Paddy rice
  
  
• Which is a secondary pollutant?
  
  (A) Carbonic Acid
  (B) CO₂
  (C) SO₂
  (D) CO

CHEMISTRY
GROUP FIRST 12^th CLASS
TIME:3:10 HOURS
New COURESS
MARKS: 83
SUBJECTIVE
SECTION-I

2. Write short answer, any Eight (8) questions of the following 16

• Zno is amphoteric in nature. Discuss
• Why the ionic radii of negative ions are larger than the size of their parent atoms?
• Why aquous solution of Ne₂CO₃ is alkaline in nature?
• What is meant by chemical Garden?
• Write any four uses of borax
• Write the names and chemical 'ormolu of four boric acids
• Describe ring test for confirms ion of nitrate ions in solution
• Why SO₃ is dissolved in H₂SO₄ and not in water
• Write two reactions is which H₂SO₄ acts as a dehydrating agent
• Write four uses of halogens
• Write the reaction of Cl₂ with hot NaOH
• Write four uses of bleaching gimlet

3. Write short answers any Eight (8) questions of the following 16

• What are typical and non typical transition elements? Why are they called so?
• Define coordination number and give two examples
• I- Butane does not show geometrical isomerism, but 2-Butene does. Give reason
• Give the names of four compounds which are homocyclic but are not aromatic
• Define Markownikor's rule and give one example
• How ethyne is convened to (a)Acetaldehyde (5) Benzene
• Fehling solution reacts with aldehyde to give red precipitates. Give equation of the reaction
• Write down four uses of acetaldehyde
• How aldehyde reacts with hydrazine ? Give its mechanism
• What are lipids? Give their types
• Write the factors which affect be enzyme activity
• Define Saporitication and Hardening of oil

4. Write short answers any Six (6) questions of the following 12

• What are the major product when Chlorine reacts with Toluene in the presence of sunlight?
• Show the mechanism for the reaction of acetone with Grignard's reagent.
• What is Williamson's Synthesis of Ethers?
• Conc. HNO₃ reacts with Phenol to give picric acid. How?
• What are Macro-neutrients?
• What is the importance of Potassium fertilizer?
• Define paper 
• Discuss detergents as water pollutants
• Name the factors which affect the quality of water

SECTION-II

Note: Attempt any Three questions from the section 8*3=24

Question#5
(a) Define group and period. Discuss only the period in detail 4
(b) How sodium metal is prepared commercially by Down's cell? 4

Question#6
(a) How organic compounds arc classified ? Give suitable example of each type 4
(b) Define nuclophilic substitution reaction and discuss the salient features of S_NI reaction 7. 4

Question#7
(a) What do you mean by saturated and unsaturated hydrocarbons? How these are distinguished chemically? 4
(b) Write down any four methods of preparation of acetic acid with reactions 4

Question#8
(a) Give mechanism with an example of Friedel Craft's acylation reaction 4
(b) Explain the following terms using ethyl alcohol 4
(i) Oxidation
(ii) Dehydration

Question#9
(a) Explain open Hearth process for the manufacture of steel 4
(b) What are pesticides? Explain how politicizes are dangerous to human beings 4

SECTION —III
(PRACTICAL)

10. Attempt any three parts from A,B,C ,Dand E
(A) (i) Write down any two confirmatory meats for phosphate radical 3
(ii) Name the radicals of Group IIA and IIB 2
(B) (i) Give two confirmatory tests for Fe³⁺ 3
(ii) How will you perform flame tests ' 2
(C) (i) Write two confirmatory tests for bi2` 3
(ii) What are the colors of following gas? Name the corresponding radicals also 2
(i) C1₂
(ii) Br₂
(iii) NO₂
(iv) HCI
(D) (i) Write down material required, chemical equation and procedure for the preparation of Aspirin
(E) Identify phenolic group in an organic compound. Give its two confirmatory tests