Iron has only one valency.

Which of the following elements has only one valency?

State whether true (T) or false (F) : A cone has only one face .

State whether true (T) or false (F) : A cylinder has only one vertex.

When a spiral bacterium has only one curve and is comma like, it is called

For an electron, with n=3 has only one radial node. The orbital angular momentum of the electron will be :

In which of the following compound has only one type of hybridised carbon atom?

Which of the following figures has only one line of symmetry ?

[A]: Each gemete has only one allele for each trait. [R]: It is true of single trait crosses only.

Assertion A mirror has only one focus, while that of lens has two focii. Reason Both the focii of a mirror coincide at one point.

A triangle may not have(a) an altitude (b) can have at most 3 altitudes (c) has three altitudes (d) has only one altitude