List of top Chemistry Questions

Nitration of phenyl benzoate yields the product

Cyclopentadienyl anion is

Conversion of esters to aldehydes can be accomplished by

Heating a mixture of $ {Cu_2O}$ and $ {Cu_2S}$ will give

The monomers of Buna-S rubber are

The species having pyramidal shape according to VSEPR theory is

Cylohexylamine and aniline can be distinguished by

Atomic radius (pm) of Al, Si, N and F respectively is

Which of the following statement (S) is true

The bond length (pm) of $ {F_2, H_2, Cl_2}$ and $ {I_2}$, respectively is

Which of the following elements has the lowest melting point ?

Given $\Delta H_{f}{ }^{\circ}$ for $CO _{2}(g), CO (g)$ and $H _{2} O (g)$ are $ -393.5, -110.5 \text { and } -241.8 kJ mol ^{-1}$, respectively. The $\Delta H_{f}^{\circ}$ [in $kJ mol ^{-1}$ ] for the reaction $CO _{2}(g)+ H _{2}(g) \longrightarrow CO (g)+ H _{2} O (g)$ is

Which among the following is the strongest acid?

Consider the single electrode process $4H^{+} + 4^{-} e 2H _2$ catalyzed by platinum black electrode in $HCl$ electrolyte. The potential of the electrode is $-0.059\,V$ $V. SHE$. What is the concentration of the acid in the hydrogen half cell if the $H_2$ pressure is $1$ bar ?

The number of complementary Hydrogen bond(s) between a guanine and cytosine pair is

Which of the following is true for spontaneous adsorption of $H_2$ gas without dissociation on solid surface

1 -Propanol and 2-propanol can be distinguished by

A first order reaction has a specific reaction rate of $10^{-2} \, sec^{-1}$. How much time will it take for $20\, g$ of the reactant to reduce to $5\, g$ ?

What is $Z$ in the following sequence of reactions? $\text{Phenol}\xrightarrow[\text{dust}]{Zn} X \xrightarrow[{\text{Anhyd}}.AlCl_3]{CH_3Cl} Y \xrightarrow[KMnO_4]{\text{Alkaline}}Z$

The value of Planck's constant $(h)$ is $6.63 \times 10^{-34} Js$. The velocity of light is $3.0 \times 10^{8} ms ^{-1}$. Which value is closest to the wavelength (in meters) of a quantum of light with frequency of $8 \times 10^{15} s ^{-1}$ ?

The emf of a particular voltaic cell with the cell reaction $Hg_{2}^{2+}+H_{2} {\rightleftharpoons} 2Hg+2H^{+}$ is 0.65 V. The maximum electrical work of this cell when 0.5 g of $H_{2}$ is consumed.

According to crystal field theory, the $M - L$ bond in a complex is

Which one of the following has (have) octahedral geometry ? (i) $SbCl^{-}_6$ (ii) $SnCl^{2-}_6$ (iii) $XeF_6$ (iv) $IO^{5-}_6$

Gabneil's pthalimide reaction is used for the synthesis of

What are the structural units of proteins?