beryllium isnot very familiar because
(i). It is not very abundant
(ii). It is inert
(iii). It is radioactive
(iv). It is difficult to extract
(v). It is difficult to extract

Which of the following statement is correct regarding the nitrogen molecule? (i) it is diamagnetic and diatomic (ii) It is contains a triple bond (iii) It is very stable (iv) It is inert at room temperature

i. ii. iii. iv. iv. v.

Identify: i. ii. iii. iv. v. vi.

Statement I: Diffracton can be seen clearly if the edge of obstacle or slit is very sharp. Statement II: As the size of the slit is much larger than the wave-length, so it is very difficult to capture the effect of diffraction by naked eyes.