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. The stability of + 1 oxidation state increases in the sequence

    • a) Tl < In < Ga < Al
    • b) In < Tl < Ga < Al
    • c) Ga < In < Al < Tl
    • d) Al < Ga < In < Tl
    Check Answer

  • 2. Statement-1: Acidic strength boron halide is as BF3 < BCl3 < BBr3 < Bl3
    and
    Statement-2: Fluorine is more electronegative & creates greater electron deficiency on boron.

    • a) Statement-1 is True, Statement-2 is True; Statement-2 is correct explanation for Statement-1
    • b) Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1
    • c) Statement-1 is True, Statement-2 is False
    • d) Statement-1 is False, Statement-2 is True
    Check Answer

  • 3. Which of the following statement is not correct ?

    • a)  'p' block elements have metals, non-metals and metalloids
    • b)  The non-metallic character decreases down the group in 'p'-block elements
    • c)  All 'p' block elements are not electropositive elements
    • d)  In general, oxides of 'p' block elements either acidic or amphoteric in nature
    Check Answer

  • 4. Inert pair effect is observed

    • a) When an element shows inertness in chemical combination
    • b) When a bond pair of electrons is present in the element
    • c) When the two s electrons remain paired and do not participate in bonding
    • d) When non–metallic character decreases
    Check Answer

  • 5. Reduction potentials of IIIA group elements are given below
    B+3/B = – 0.87; Al+3/Al = – 1.68; Ga+3/Ga = – 0.52
    In+3/In = – 0.34; Tl+/Tl = – 1.34
    By observing the above values choose the correct statement.

    • a)  Tl+3 can reduce Al+3 and B+3
    • b)  Tl+3 can oxidize Al+3 and B+3
    • c)  Al0 can reduce Ga+3 and In+3
    • d)  Tl0 can reduce Al+3
    Check Answer