List of top Chemistry Questions

The paramagnetic nature of oxygen molecular is best explained on the basis of
The IUPAC name of   2,3-dimethylpentanoyl chloride is :
Which of the following is the most basic oxide ?
Which of the following is not a correct statement ?
The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is :
Which of the following is not isostructural with \(\text{SiCl}_4\) ?
The pair in which both species have same magnetic moment (spin only value) is
$ CH_3 - CH = CH_2+NOCl \longrightarrow P; $ Identify the adduct.
The atomic numbers of $Ni$ and $Cu$ are $28$ and $29$ respectively. The electron configuration $Is^2 2s^2 2p^6 3s^2 3p^6 3d^{10}$ represents
Aspirin is:
Which of the following metals is most reactive towards water?
The pyrimidine bases present in DNA are :
For a spontaneous reaction, free energy
In the reaction, $C_{(s)} + O_{2(g)} \to CO_{2(g)}$
What is the effect of dilution on the equivalent conductance of strong electrolyte?
$4$ moles each of $S O_{2}$ and $O_{2}$ gases are allowed to react to form $SO_{3}$ in a closed vessel. At equilibrium $25 \%$ of $O_{2}$ is used up. The total number of moles of all the gases present at equilibrium is
A $5 \%$ solution (by mass) of cane sugar in water has freezing point of $271 \,K$ and freezing point of pure water is $273.15 \,K$. The freezing point of a $5 \%$ solution (by mass) of glucose in water is
The water pouch of instant cold pack for treating athletic injuries breaks when squeezed and $NH_4NO_3$ dissolves lowering the temperature. Addition of nonvolatile solute into solvent results into depression of freezing point of solvent.
$ 35.4\,\,mL $ of $ HCl $ is required for the neutralization of a solution containing $0.275 \,g$ of sodium hydroxide. The normality of hydrochloric add is?
Which of the following does not effect half-life of first order reaction?
Half-life of a substance is 6 min. If its initial amount is 32 g, then amount present after 18 minis:
The rate constant of a reaction is $2.3\times10^{-2} mol^{-2} L^{2} min^{-1}.$ The order of reaction is
The rate constant for a first order reaction whose half-life, is $480\, s$ is:
According to transition state theory, for the formation of an activated complex, one of the vibrational degrees of freedom is converted into a translational degree of freedom. Energy of the activated complex is higher than the energy of reactant molecules.
In a chemical reaction two reactants takes part. The rate of reaction is directly proportional to the concentration of one of them and inversely proportional to the concentration of the other. The order of reaction is: