MODEL TEST PAPER -4 (CHEMISTRY)

₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉

Time: 1 Hour 30 Mins.          F.M-40 

Attempt all questions from Section A and any three questions from Section B 

                  SECTION A 

            (Attempt all questions) 

Question 1.                                   (10

Write the correct option only 

i) Carbon reduction is not used for the extraction of--- 

A) Fe B) Na C) Zn D) Pb 

ii) Roasting is a process of a heating--- 

A) In presence of air B) In absence of air C) In presence of a water D) In absence of water 

iii) Froth floatation is used the concentration of--- 

A) oxide ore B) carbonate ore C) Sulphide ores D) chloride ore 

iv) Nichrome is made up of -- 

A) Cu + Zn+ Al B) Ni + Fe+ CR C) Pb+ Sn+ SB D) Na+ Hg + Cu 

v) The aim of the Fountain experiment is -- 

A) HCl is denser than air B) HCl turns blue litmus red C) HCl is highly soluble water D) HCl fumes in moisture air 

vi) The chemical used in the brown ring test is -- 

A) CuSO₄ B) ZnSO₄ C) Fe₂(SO₄)₃ D) FeSO₄ 

vii) Carbon to Carbon double bond is found in-- 

A) Acetaldehyde B) Acetic Acid C) Ethyl alcohol D) 2-butylene

vii) The gas evolved when dilute sulphuric acid reacts with iron sulphide --- 

A) Sulphur Dioxide B) Nitrogen dioxide C) carbon dioxide D) hydrogen Sulphide 

ix) Which one of the following has maximum boiling point--- 

A) Ethane B) Propane C) Butane D) Pentane 

x) IUPAC name of the following compound is-- 

                CH₃ 

                  | 

     CH₃--- CH --- CH₂--- OH is 

A) 2 methyle propane -3 -ol  

B) 2 - 2 dimethyl butanol 

C) 2 methyl propane - 1 - ol 

D) 3 methyle propane -1 - ol 

              SECTION - B 

(attempt any three question from this section)

Question 2.

i) Write cathode and anode reaction for extraction of aluminium in Hall- Heroults process.                       (2)

ii) Select the correct answer from the brackets to complete the following statements.                (2)

a) Zinc blend is converted to oxide by ___(roasting/calcination) process.

b) The catalyst used in the oxidation of ammonia is ____(zinc/ Platinum).

iii) A substance 'A' was heated with slaked lume, a gas B obtained with a pungent smell. Name the substance A and B and write the balanced equation.                   (3)

iv) What is a Aqua regia ? Write the reaction how it give soluble chloride ?                                                   (3)

 Question 3.

i) Define pulverization and calcination.                                 (2)

ii) Name the compound formed when :

   a) When Ammonia and hydrochloric gas react.

  b) Ethane react with hydrogen in presence of platinum catalyst.

iii) Write the chemical equation for the preparation of NH₃ in laboratory ? Why H₂SO₄ is not used as a drying agent for NH₃.                               (3)

iv) Name the following organic compound.                                    (3)

a) The first homologous whose  general formula is CₙH₂ₙ.

b) The compound formed by complete chlorination of ethyne.

c) When 1-2 dibromoethane is boiled with alcoholic KOH which product is formed.

Question 4.

i) Write two ores of Almunium.   (2)

ii) Name one alloy that contains Almunium.

iii) Identify the terms for the following:.                                     (3)

 a) The electrodes where oxidation takes place.

 b) The process by which crude metal is purified.

 c) A method used to collect HCl gas.

iv) Complete the table given below: (3)

Name-process  reactant     product

a) ____.        oleum+H₂O         H₂SO₄ 

b) ___   Nitrogen+ H₂             ____

              Tem-450°

             pressure -200atms

           Catalyst Fe & Mo 

Question 4

i) a) Which product is formed when HCL and NH₃ react together?

 b) What is the change of CuO takes place when NH₃ gas is passed through over heated CuO?          (2)

ii) Write the IUPAC nomenculture of the following compounds 

a)     CH₃--CH--CH₂--CH--CH₂--CH₃

                    |                | 

                   Br             Cl 

  

        

             O

             ||                 

b) CH--C--CH₂--CH₂--- CH₃.            (2) 

iii) Write the formula of the product: (3)

 a) C₂H₅Br + KOH(aq)---> 

 b)  C₂ = C₂ + HBr --->   

 c) CH₂ = CH₂  (alkaline)(KMnO₄)-->  

iv) Name the hydrocarbon which is:

a) tetrahedral molecule.

b) A planer molecule.

c) a linear molecule.                    (3)

Question 6.

i) Write two isomers of the compound with molecular formula C₂H₆O.                                            (2)

ii) What is the general formula of alkene and write the name of smallest alkalane ?                      (2)

iii) Write the balanced equation for the following conversions:

 a) When Ammonium Nitrate is heated ?

 b) When hydrogen Sulphide react with sulphuric acid ?

 c) methanol is heated with con.H₂SO₄ at 170°C                      (3)

iv) Compound A is bubbled through bromine dissolved in carbon tetrachloride and the product is CH₂Br ---CH₂Br 

      Br₂CCl₄

 A -----------> CH₂--Br--CH₂--Br 

 a) Draw the structural formula of A ?

  b) What type of reacts has A undergone ? 

 c) What will you observe ?         (3)