The P Block Elements Set 1

Acidic towards litmus ✘ Basic towards litmus ✘ Neutral towards litmus ✘ Amphoteric ✔ NULL ✔ NULL NULL

Krypton ✘ Radon ✘ Xenon ✘ Argon ✔ NULL ✔ NULL NULL

Helium is much less soluble in blood than nitrogen ✘ Nitrogen is much less soluble in blood than helium ✘ Due to high pressure deep under the sea nitrogen and oxygen react to give poisonous nitric oxide ✘ Nitrogen is highly soluble in water ✔ NULL ✔ NULL NULL

✘ ✘ ✘ ✔ NULL ✔ NULL NULL

The fixation of nitrogen ✘ The activity of symbiotic bacteria ✘ The effect of lightening and bacteria ✘ The nitrogen cycle in nature ✔ NULL ✔ NULL NULL

Al ✘ Fe ✘ Pb ✘ Mg ✔ NULL ✔ NULL NULL

✘ ✘ ✘ ✔ NULL ✔ NULL NULL

Oxidizing properties ✘ Reducing properties ✘ Basic properties ✘ None of these ✔ NULL ✔ NULL NULL

Colourless ✘ Pale yellow ✘ Pale blue ✘ Dark blue ✔ NULL ✔ NULL NULL

Birkeland and Eyde's process ✘ Haber's process ✘ Contact's process ✘ Fischer-Tropsch's process ✔ NULL ✔ NULL NULL