List of top Chemistry Questions

If the principal quantum number $\text{n} = 6 ,$ the correct sequence of filling of electrons will be:
The valence shell electronic configuration of an element is $\text{ns}^{2} \text{np}^{5} .$ The element will belong to the group of -
Choose the correct statement about the major product formed in E2 reaction ?
Which of the following is an intensive property of the system?
Which of the following sets has strongest tendency to form anions?
Alizarin is an example of
Acetamide and ethylamine can be distinguished by reacting with
A system absorb $600\, J$ of heat and work equivalent to $300\, J$ on its surroundings. The change in internal energy is:
A spontaneous reaction is impossible if
A metal oxide has the formula $ A_{2}O_{3}$ . It can be reduced by hydrogen to give free metal and water. $0.1596\, g$ of this metal oxide requires $6\, mg$ of hydrogen for complete reduction. What is the atomic weight of metal?
The major product of the reaction of with electrophile, $ E^{+} $ , is
Which one of the following is an example of $ 3^{\circ} $ amide?
Which of the following species is not electrophilic in nature ?
Which one of the following is a chain growth polymer ?
When ammonia is heated with cupric oxide, a molecule of ammomia will
$4.5\, g$ of aluminium (at. mass $27\, u$ ) is deposited at cathode from a molten electrolyte containing $Al ^{3+}$ ions by a certain quantity of electric charge. The volume of hydrogen produced at STP from $H ^{+}$ions in a solution by the same quantity of electric charge will be
$B_2$ molecule is diamagnetic. The highest occupied molecular orbital is of $\sigma$ type.
Which one of the following is not present in RNA?
A certain mass of gas occupies a volume of $2$ litre at STP keeping the pressure constant. At what temperature would the gas occupy a volume of $4$ litre?
In the compounds $KMnO_{4}$ and $K_{2}Cr_{2}O_{7},$ the highest oxidation state is of the element:
The substance used as pigment in paint is:
What bond order does $Li_{2}$ have?
$ C_6H_5 - CH = CHCHO {->[X]} C_6H_5CH = CHCH_2OH$ In the above sequence $X$ can be:
Among $ HF,CH_{4},CH_{3}OH$ and $N_{2}O_{4},$ inter molecular hydrogen bond is expected:
Maximum number of hydrogen bonding in $ {{H}_{2}}O $ is: