In a reaction the oxidtion number of an element becomes zero from -1 It is a case of:

Oxidation number of an element can be zero but valency is never zero.

Statement The oxidation number of an element in its free or uncombined from is zero. Explanation The oxidation number of a monoatomic cation or anion is equal to its charge.

An element becomes another element if the number of

In the reaction of chlorine with dry slaked lime, the oxidation number of chlorine changes i) from -1 to +1 ii) from + 1 to -1 iii) from zero to -1 iv) from zero to +1 The correct combination is

If A is a skew symmetric matrix and B is an upper triangular matrix of order 'n', then the ratio of the maximum number of non-zero elements in A to the minimum number of zero elements in B is

When the eccentricity of a ellipse becomes zero , then it becomes a

What is the number of zeros at the end of the product of the numbers from 1 to 100?