Question

Sole the the all 3 questions

Answer 1

Answers:

1. element B is the odd one. because all other elements belong to to first group while element B belong to 6th group.

or

lithium forms the most basic oxide while nitrogen forms the most acidic oxide.

2. secondary consumer would have 2000 joule of energy . so the amount of energy that is transferred from secondary consumer to the tertiary consumer is 200 J.

3. the object should be placed at 2F1 (C1)

or

the object should be placed between pole (P) and principal focus (F)