List of top Chemistry Questions

Find the number of water molecules in $1 \text{ mL}$ of water vapours at STP?
Which of the following species acts as strongest oxidising agent?
Which among the following is NOT Allylic halide?
For a reaction, A + B $\longrightarrow$ product, it is found that rate law is r = k[A]$^{1.5}$ [B]$^{2.5}$. What is the order of reaction?
Identify product ' $B$ ' in the following sequence of reaction.
$\text{Aniline} \xrightarrow[273 \text{ K}]{\text{NaNO}_2 + \text{HCl}} \text{A} \xrightarrow{\Delta}{\text{H}_2\text{O}} \text{B} + \text{N}_2 \uparrow$
Identify isoelectronic pair from following.
Which of the following ion exhibits maximum power of coagulation for positively charged Sol ?
Calculate the change in internal energy of the system if 20 kJ work is done on the system and it releases 10 kJ heat in a particular reaction.
Which from following is used as catalyst in Fisher Tropsch process for the synthesis of gasoline?
Which from following solutions exhibits minimum boiling point elevation under identical conditions? (Assume complete dissociation)}
Which of the following halogen forms maximum number of oxoacids?
Identify a monomer used in preparation of neoprene.
Identify neutral ligand from following?
Which of the following is correct IUPAC name of catechol?
Which among the following statements is true for haloalkyne?
The pH of a solution is 3. What is the concentration of hydrogen ions in this solution?
Consider the following
Assertion (A): phosphorus can form both phosphorus (III) and phosphorus (V) chlorides but nitrogen cannot form nitrogen(V) chloride.
Reason (R): The electronegativity of nitrogen is more than that of phosphorus
The correct answer is
The magnetic moment of \( \text{Mn}^{3+} \) is:
0.3 g of acetic acid (Molar mass = 60 g mol\(^{-1}\)) dissolved in 30 g of benzene shows a depression in freezing point equal to 0.45°C. Calculate the percentage association of acid if it forms a dimer in the solution.
(Given: \( K_f \) for benzene = 5.12 K kg mol\(^{-1}\))
Which of the following is Hinsberg's reagent?
The rate constant for the hydrolysis of sucrose by an enzyme at $300\,K$ is $k_1$ and at $320\,K$ is $1.25k_1$. The activation energy is (in kJ mol$^{-1}$):
\(CH_3 - CH_2 - CH(CH_3) - CH(CH_3) - ONa + C_2H_5Br \rightarrow\)
Which of the following compound has the highest boiling point?
The order of reactivity of the following compounds towards SN2 displacement reaction is (i) \(C_{6}H_{5}CH(CH_{3})Br\) (ii) \(C_{6}H_{5}CH(C_{6}H_{5})Br\) (iii) \(C_{6}H_{5}C(CH_{3})(C_{6}H_{5})Br\) (iv) \(C_{6}H_{5}CH_{2}Br\)
The major product obtained in the dehydration of ethanol in the presence of \(H_{2}SO_{4}\) at 413 K is