List of top Chemistry Questions

How many $\sigma$ and $\pi$-bonds are in $SO _{4}^{2-}$ ?
$H_2S_2O_7$ has a commercial name as
Excess of KI reacts with $CuSO_4$ solution and then $Na_2S_2O_3$ solution is added to it. Which of the statements is incorrect for this reaction?
Codon is present in
Which of the following reacts with both acetaldehyde and acetone?
Bradys reagent is:
In which of the following reactions, ethyl chloride is obtained in good yield?
Which of the following yield $2$ mole of formaldehyde on ozonolysis?
What will be obtained when acetylene is treated with arsenic chloride?
Phenol on treatment with formaldehyde in dilute alkaline solution, gives:
$ C-O $ bond in ether can be broken by:
The $pK_a$ of acetic acid is lower than that of phenol. Phenoxide ion is more resonance stabilised.
$HClO_4$ is a stronger acid than $HClO_3$. Oxidation state of chlorine in $HClO_4$ is $+7$ and in $HClO_3$ is $+5$.
Aqueous gold colloidal solution is red in colour. The colour arises due to scattering of light by colloidal gold particles.
All $F - S - F$ angle in $SF_4$ is greater than $90^{\circ}$ but less than $180^{\circ}$. The lone pair-bond pair repulsion is weaker than bond pair-bond pair repulsion.
Which of the following is a biodegradable polymer?
Among the following, the most reactive towards alcoholic $KOH$ is :
Which of the following does not have optical isomer?
The major products formed by heating $C_6H_5CH_2OCH_3$ with $HI$ are $C_6H_5CH_2I \, and \, CH_ 3OH. $ Benzyl cation is more stable than methyl cation
Isobutanal does not give iodoform tests. It does not have $\alpha$-hydrogen
Which one of the following forms with an excess of $CN^-$ (cyanide) a complex having coordination number two?
Which of the following is only acidic in nature?
Maltose is a reducing sugar which gives two moles of D-glucose on hydrolysis Maltose has a$ 1,4-\beta$-glycosidic link-age
The $ONO$ angle is maximum in
Shape of $O_2F_2$ is similar to that of