Advertisements
Advertisements
प्रश्न
Give two applications of chromatography.
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
Give the symbols of: Carbon, calcium, copper, chlorine, cobalt, argon.
Give two examples of the following.
Non-metals which are lustrous
Give two examples of the following.
Inert gases
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name - a poisonous gas almost as heavy as air.
Complete the statement – an element is a pure substance made up of ____________ atoms.
Complete the statement given below by filling in the blank with the correct word.
The basic unit of an element is an __________.
Complete the statement given below by filling in the blanks with the correct words.
From the elements – He, Br, Pt, and O; the element which is metallic is ____, an inert element is ____, forms a triatomic molecule is ____, is liquid at room temperature is_ ___.
Represent with the help of a simple chart how matter is classified into pure or impure substances & further into elements, compounds & mixtures, with elements further segmented.
The first letter of an element is always written in ______ letter.
Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?
