List of top Chemistry Questions

Which of the following is a sink for $CO$ ?

What is the probable free amino acid product formed when $ R^1CH(NH_2)CONHCHR^2COOH $ reacts with $ 1 $ -fluoro- $ 2,4 $ -dinitrobenzene in presence of $ NaHCO_3 $ followed by acid hydrolysis?

$ Cu $ crystallizes as face centred cubic lattice with edge length of $ 3.56 \, ? $ . What will be the nearest distance between $ Cu $ atoms?

Which of the following statements is INCORRECT for pair of elements $Zr - Hf$ ?

The metal extracted by leaching with a cyanide is

Consider the reactions :- Identify $A, X, Y$ and $Z$

Which one is the most acidic compound ?

Which of the following reactions is appropriate for converting acetamide to methanamine ?

Which one is the correct order of acidity ?

For a given reaction, $\Delta H =35.5\, kJ\, mol ^{-1}$ and $\Delta S =83.6\, JK ^{-1}\, mol ^{-1} .$ The reaction is spontaneous at $:$ (Assume that $\Delta H$ and $\Delta S$ do not vary with temperature)

With respect to the conformers of ethane, which of the following statements is true ?

What will be the value of activation energy ( $ E_a $ in $ kJ $ ) and rate constant ( $ k\, in\, min^{-1} $ ) for the given equation at $ 27^{\circ}C $ ? The equation : $ lnk = - 2576/T+ 12.1 $

Concentration of the $Ag^+$ ions in a saturated solution of $Ag_2C_2O_4$ is $2.2 \times 10^{-4}\, mol\, L^{-1}$ Solubility product of $Ag_2C_2O_4$ is :-

The following equilibrium constants are given $N _{2}+3 H _{2} \rightleftharpoons 2 NH _{3} ; K _{1}$ $N _{2}+ O _{2} \rightleftharpoons 2 NO ; K _{2}$ $H _{2}+1 / 2 O _{2} \rightleftharpoons H _{2} O ; K _{3}$ The equilibrium constant for the oxidation of the $NH _{3}$ by oxygen to give $NO$ is:

An example of a sigma bonded organometallic compound is :

$HgCl_2$ and $I_2$ both when dissolved in water containing $I^-$ ions the pair of species formed is :

The ground state magnetic property of $B_2$ and $C_2$ molecules will be

In a close-packed body-centred cubic lattice of potassium, the correct relation between the atomic radius $(r)$ of potassium and the edge-length $(a)$ of the cube is

Reduction of the lactol  OH with sodium borohydride gives

$3ClO^{-}(aq) -> ClO^- + 2Cl^-$ is an example of

Pick out the correct statement with respect to $[Mn(CN)_6]^{3-}$ :

It is because of inability of $ns^{2}$ electrons of the valence shell to participate in bonding that:-

It is because of inability of $ns^{2}$ electrons of the valence shell to participate in bonding that:-

In which of the following, homolytic bond fission takes place ?

In which of the following, homolytic bond fission takes place ?