1.

Read the passage given below and answer the following questions:Oxygen is the most abundant of all the elements on earth. Oxygen forms ab out 46.6% by mass of earth’s crust. Dry air contains 20.946% oxygen by volume However, the abundance of Sulphur in the earth’s crust is only 0.03- 0.1%. Combined sulphur exists primarily as sulphates such as gypsum CaSO4.2H2,epsom salt MgSO4.7H2O, baryte BaSO4 and sulphides such as galena PbS, zinc blende ZnS, copper pyrites CuFeS2 Traces of sulphur occur as hydrogen sulphide in volcanoes. Organic materials such as eggs, proteins, garlic, onion, mustard, hair and wool contain sulphur. Selenium and tellurium are also found as metal selenides and tellurides in sulphide ores. Polonium occurs in nature as a decay product of thorium and uranium minerals. Livermorium is a synthetic radioactive element. i. Which of the following group 16 elements show maximum catenation property?a). Ob). S c). Sed). Teii. Which of the following group 16 elements does not exist in ‐2 oxidation state? a). O b). S c). Se d). Teiii. Which of the following is most volatile? a). H2O b). H2S c). H2Se d). H2Teiv. Which of the following is the wrong statement? a). Ozone is diamagnetic gas b). O2 is paramagnetic c). O3 molecule is bent d). O – O bond lengths in ozone are unequal

Answer»

i. B  

ii. D 

iii. B 

iv. D



Discussion

No Comment Found

Related InterviewSolutions