Toh chalo kyun na aaj share karein padhai ka anmol tofa :D #ShareTheGiftOfEducation

Kya aap jaante hain pani mein namak dalte hi pani ka level kam kyun ho jata hai? :D

Sulphur and rest of the elements of group 16 are less electronegative than oxygen, Therefore, their atoms cannot take electrons easily. They can acquire ns^2 np^6 configuration by sharing two electrons with the atoms of other elements and thus, exhibit +2 oxidation state in their compounds. In addition to this, their atoms have vacant d-orbitals in their valence shell to which electrons can be promoted from the p and s-orbitals of the same shell. As a result, they can show +4 and + 6 oxidation states. The oxidation state of sulphur in Na_2 S_4 O_6 is

Read the following five statement (A to E) and select the option with all correct statements: (A) Analogy indicates common ancestry. (B) All the existing life forms share similarities and share common ancestors. (C ) Conventional religious literature supports the theory of special creation. (D) Sweet potato (root modification) and potato (stem modification) is na example for homology. (E) Fossils are remains of hard parts of life-forms found in rocks.