List of top Chemistry Questions

Which of the following is paramagnetic ?
In which of the following groups, when He is placed, its all the properties are satisfied ?
Gasoline is a mixture of hydrocarbons containing
Baking soda or baking powder is
$H _{3} PO _{3}$ is dibasic acid. Two hydrogen atoms are directly attached to the P.
Transition metals mostly are
Zinc and mercury do not show variable valency like d-block elements because
Elements which generally exhibit multiple oxidation states and whose ions are usually coloured are
The halogen that is most easily reduced is
Which of the following is not a sex hormone ?
In polysaccharides, the linkage connecting monosaccharide is called
According to the postulates of Werner for coordination compounds
On reduction of $KMnO_4$ by oxalic acid in acidic the oxidation number of Mn changes.What is the magnitude of this change ?
On heating sodium metal in a current of dry ammonia,the compound formed is
The boiling point of heavy water is
Benzoyl chloride is prepared from benzoic acid by :
Which is not hydrolysed?
A molecule contains atoms $x$ and $y$ so that $x$ occurs at the corners of the cube while $y$ at the face centre. The formula of the molecule can be
Which of the following is true about $ClO _{2}$ ?
A gas $z$ is bubbled through a solution containing $x ^{-}$ and $y ^{-}$. If the reduction potential are in the order $x>y>z$, then
The formula of microcosmic salt and the product obtained by heating it is
$CuSO _{4}$ dissolves in $NH _{3}$ due to the formation of
Which of the following is paramagnetic?
Which of the following has a tendency for covalent compound formation?
Oxidation state of sulphur in $S _{8}, H _{2} S$ and $S _{2} F _{2}$ is