List of top Chemistry Questions

Consider the following statements I. Repulsive forces are significant when the molecules are close together on average. II. Attractive intermolecular forces are important when the molecules are fairly close together but not necessarily touching. III. Attractive forces are ineffective when the molecules are for apart. Select correct statements.
Which of the following represents the zero overlap ?
The extent of adsorption of a gas on a solid depends on
The correct decreasing order of basic strength of the following species is
In the metallurgy of aluminium
On cooling, the brown colour of nitrogen dioxide disappears. On cooling, $ NO_{2}$ undergoes dimerisation resulting in the pairing of odd electrons of $NO_{2}$.
Which of the following is an emulsion?
Which of the following is not an ore of iron?
Which of the following statement is not true for hydrolysis of $XeF_6$ ?
Which one of the following reaction provides a primary alcohol?
Which one of the following pairs represents stereoisomerism?
Which of the following element has lowest melting point?
Which of the following compounds are optically active? (i) 3-hydroxypentane$\quad$$\quad$ (ii) 2-aminopropanoic acid (iii) 2-chlorobutane $\quad$$\quad$(iv) 2-methylbutane Choose your answer from the codes given below
When trans-2-butene is reacted with Br then product formed is
What reagent is used in the Hinsberg test of amines?
There is loss in weight when mixture of $ L{{i}_{2}}C{{O}_{3}} $ and $ N{{a}_{2}}C{{O}_{3}}.10{{H}_{2}}O $ is heated strongly. This loss is due to
The group 13 element that is liquid during summer and used for measuring high temperature is
The ability of d-block elements to form complexes is due to
Strength of $H_2O_2$ is $15.18\, g\, L^{-1}$, then it is equal to
Starch is a mixture of two components, a water soluble component amylose $(15-20\%)$ and a water insoluble component amylopectin $(80-85 \%)$. The aqueous solution of amylose gives a blue colour with iodine solution due to the formation of
Select the correct pair amongst the following.
Rubber is commercially obtained from
Predict in which of the following entropy decreases.
Photochemical smog is formed in
Particle $A$ makes a perfectly elastic collision with another particle $B$ at rest. They fly apart in opposite directions with equal speeds. The ratio of their masses $m_A/m_B$ is