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Chemistry Test 156
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Chemistry Test 156
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  • Question 1/10
    4 / -1

    Solutions

    Since, C when heated with Br2 in presence of KOH produces ethylamine, hence it must be propanamide and hence the organic compound (A) will be propanoic acid. The reaction follows.

     

     

  • Question 2/10
    4 / -1

    Solutions

     

  • Question 3/10
    4 / -1

    Solutions

    Chemically amylose is a long unbranched chain with 200-1000 a–D–(+ –glucose units held by C1-C4 glycosidic linkage.

     

  • Question 4/10
    4 / -1

    Structures of some common polymers are given. Which one is not correctly presented?

    Solutions

    Neoprene is a polymer of chloroprene. Hence, correct representation is

     

  • Question 5/10
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    Directions For Questions

    Which of the following is not correctly matched?

    (i) Proteins that are – Receptors crucial to body’s communication process.

    (ii) Drugs that mimic – Antagonists the natural messenger by switching on the receptor.

    (iii) Drugs that binds to – Agonists the receptor site and inhibit its

    ...view full instructions

    natural function.

    Solutions

    Drugs that mimic the natural messenger by switching on the receptor are called agonists. While drugs that binds to the receptor site and inhibit its natural function are called antagonists.

     

  • Question 6/10
    4 / -1

    Solutions

     

  • Question 7/10
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    If f denotes reduction potential, then which is true?

    Solutions

     

  • Question 8/10
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    Solutions

     

  • Question 9/10
    4 / -1

    A colloidal solution is subjected to an electrical field. The particles move towards anode. The coagulation of same sol is studied using NaCl,  solutions. Their coagulating power should be

    Solutions

    The movement towards anode shows that sol is negative. For coagulation of negative sol. Cation with higher charge is more effective.

     

  • Question 10/10
    4 / -1

    Which of the following elements is present as the impurity to the maximum extent in the pig iron?

    Solutions

    Pig iron or cast iron contains 3 – 5% carbon and varying amounts of Mn, Si, P and S which makes the iron hard and brittle.

     

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