READ THE INSTRUCTIONS CAREFULLYQUESTION PAPER FORMAT AND

MARKING SCHEME Maximum Marks : 240

1. The question paper has three parts: Physics, Chemistry and Mathematics. Each part has three sections.

2. Section 1 contains 8 questions. The answer to each question is a single digit integer ranging from 0 to 9 (both inclusive).

Marking Scheme: +4 for correct answer and 0 in all other cases.

3. Section 2 contains 8 multiple choice questions with one or more than one correct option.

Marking Scheme: +4 for correct answer, 0 if not attempted and – 2 in all other cases.

4. Section 3 contains 2 “ paragraph ” type questions. Each paragraph describes an experiment, a situation or a problem. Two multiple choice questions will be asked based on this paragraph. One or more than one option can be correct.

Marking Scheme: +4 for correct answer, 0 if not attempted and – 2 in all other cases.

PART – I : PHYSICS

Section 1 (Maximum Marks: 32)

This section contains EIGHT questions.

The answer to each question is a SINGLE DIGIT INTEGER ranging from 0 to 9, both inclusive.

Marking scheme:

+4 If the bubble corresponding to the answer is darkened.

0 In all other cases.

An electron in an excited state of Li2+ ion has angular momentum 3h/2 . The de Broglie wavelength of the electron in this state is p a 0 (where a 0 is the Bohr radius). The value of p is