A shiny brown coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.

A shiny brown coloured element 'X' on heating in air becomes black in colour. Can you predict the element 'X' and the black coloured substance formed? How do you support your predictions?

A colour less oxide of nitrogen in air becomes brown. Why?

Which of the following salts are black in colour?

Brown coloured metal powder is changed into black colour on heating. That metal powder may be …………… powder.

An element ""_(11)X^(23) forms an ionic compound with another element ‘Y’. Then the charge on the ion formed by 'X' is

What are the characteristic colours imparted by the II A elements?

The pair of elements do not impart flame colour test

The colours of discrete wavelength of light emitted by each of the elements are called:

The black coloured substance formed when copper is heated in presence of oxygen.