Rules

1. The test consists of 5 MCQs.

2. You can attempt any question at random but sequential answering is suggested.

3. If you wish, the EXPLANATION can be viewed immediately after answering a question. If not, you can see at the end of the test.

4. After completing the test, click FINISH button to view your PERFORMANCE REPORT.

5. Your option to a particular question will be locked if you have viewed its EXPLANATION.
All the options answered will be locked after hitting the FINISH button. Until then you can change your option(s).

6. Remember this is not a test of speed. However, the time taken to complete the test and number of hints used are displayed in the report.

  • 1. Which of the following p-block elements doesn't have ns2np1 – 6 electronic configuration ?

    • a)  C
    • b)  He
    • c)  B
    • d)  Al
    Check Answer

  • 2. Among 'p' block elements the maximum valency is shown by

    • a)  Alkali metals
    • b)  Halogens
    • c)  Elements of nitrogen family
    • d)  Noble gases
    Check Answer

  • 3. Which of the following hydroxide is acidic ?

    • a) Al(OH)3
    • b) Ca(OH)3
    • c) Tl(OH)3
    • d) B(OH)3
    Check Answer

  • 4. Arrange the following in increasing order of their Lewis acid strength with proper reasoning. BCl3, BI3, BF3 and BBr3

    • a) BCl3 < BF3 < BBr3 < BI3
    • b) BF3 < BCl3 < BBr3 < BI3
    • c) BI3 < BCl3 < BBr3 < BF3
    • d) BBr3 < BCl3 < BF3 < BI3
    Check Answer

  • 5. Which of the following obeys Lewis octet rule ?

    • a)  BH3, Al2Cl6
    • b)  B2H6, Al2Cl6
    • c)  B(OH)3, Na3Al(OH)6
    • d)  B2H6, Na3Al(OH)6
    Check Answer