Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

431. The tendency to show-2 oxidation state diminishes from S to Po. Why?

194 Views

432. Why does oxygen not show an oxidation state of + 4 and + 6 like sulphur?

334 Views

433. Give one example each of the oxoacids of phosphorus in which the P has the oxidation state of (i) + 4 (ii) + 3.

171 Views

434. Name all the elements of group 16. Which elements is radioactive?

181 Views

435. Why are group 16 elements called chalcogens?

944 Views

436. Give two important uses of Selenium.

174 Views

437. Name two allotrope of sulphur. Which allotrope is stable at room temperature?

292 Views

438. Which allotrope of selenium coducts electricity?

172 Views

In vapour state sulphur partly exists as S₂ molecule and S₂ molecule like O₂ has two unpaired electrons in the anti bonding

π

, orbital and hence exhibit paramagnetism.

1691 Views

440. Why are group 16 elements called polymorphic elements?

206 Views