SECTION 3 (Maximum Marks: 18)

• This section contains SIX (06) questions. The answer to each question is a NUMERICAL VALUE.

• For each question, enter the correct numerical value of the answer using the mouse and the on-screen virtual numeric keypad in the place designated to enter the answer. If the numerical value has more than two decimal places. Truncate/round-off the value to TWO decimal places

• Answer to each question will be evaluated according to the following marking scheme:

Full Marks : +3 If ONLY the correct numerical value is entered as answer.

Zero Marks : 0 In all other cases.

Among B 2 H 6 , B 3 N 3 H 6 , N 2 O, N 2 O 4 , H 2 S 2 O 3 and H 2 S 2 O 8 , the total number of molecules containing covalent bond between two atoms of the same kind is