List of top Chemistry Questions

Match the following
The correct answer is
Identify the compounds A and B involved in the formation of given aldol
In which of the following, intramolecular hydrogen bonding is present?
\(E^\circ_{M^{2+}/M}\) (in V) is highest for
Thionyl chloride on reaction with white phosphorus gives a compound of phosphorus 'C' which on hydrolysis gives an oxo acid 'O'. The correct statements about C and O are
I. Shape of 'C' is pyramidal
II. 'O' is a dibasic acid
III. 'O' is a monobasic acid
IV. 'C' on reaction with acetic acid gives 'O'
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
Which one of the following statements is not correct?
In the extraction of iron using blast furnace to remove the impurity (X), chemical (Y) is added to the ore. X and Y are respectively
Arrange the following complexes in the increasing order of their spin only magnetic moment (in B.M)
I. \([Fe(CN)₆]⁴⁻\)
II. \([MnCl₄]²⁻\)
III. \([Mn(CN)₆]³⁻\)
IV. \([Cr(NH₃)₆]³⁺\)
An alkyne has the molecular formula C₆H₁₀. The number of 1-alkyne isomers (excluding stereoisomers) possible for it is
The source of an enzyme is malt and that enzyme converts X into Y. X and Y respectively are
A metal crystallises in two cubic phases, fcc and bcc with edge lengths 3.5 Å and 3 Å respectively. The ratio of densities of fcc and bcc is approximately
The Gibbs energy change of the reaction (in kJ mol⁻¹) corresponding to the following cell
Cr | Cr³⁺(0.1M) || Fe²⁺(0.01 M) | Fe
(Given: \(E^\circ_{Cr^{3+}/Cr} = -0.75V\); \(E^\circ_{Fe^{2+}/Fe} = -0.45V\), 1F = 96,500 C mol⁻¹)
The IUPAC name of the following compound is
In drinking water, if the maximum prescribed concentration of copper is x mg dm⁻³, the maximum prescribed concentration of zinc will be
Which one of the following mixtures can be separated by steam distillation technique?
The incorrect statement about Castner-Kellner cell process is
The incorrect statement about the oxidation states of group 14 elements is
Which of the following is an incorrect statement about the compounds of group 13 elements?
By using which process, sodium carbonate is generally prepared?
At 298K, if the standard Gibbs energy change \(\Delta_r G^\circ\) of a reaction is - 115 kJ, the value of \(\log_{10} K_p\) will be (\(R = 8.314 \text{ J K}^{-1}\text{mol}^{-1}\))
4.0 g of a mixture containing Na₂CO₃ and NaHCO₃ is heated to 673K. Loss in mass of the mixture is found to be 0.62g. The percentage of sodium carbonate in the mixture is
Identify the electron rich hydrides from the following
At T(K) root mean square (rms) velocity of argon (molar mass 40 g mol⁻¹) is 20 ms⁻¹. The average kinetic energy of the same gas at T(K) (in J mol⁻¹) is
200 mL of an aqueous solution of HCl (pH = 2) is mixed with 300 mL of aqueous solution of NaOH (pH = 12) and is diluted to 1.0 L. The pH of the resulting solution is