List of top Chemistry Questions

The complex showing a spin only magnetic moment of $2.82\, BM$ is
Which of the following have been arranged in decreasing order of oxidation number of sulphur?
The most adsorbed gas on activated charcoal is
Which of the following is a disaccharide?
Which of the following compounds does not leave residue on heating ?
Which of the following compounds dissolve in water?
Platinum, palladium and iridium are called ?noble metals? because
By slow distillation of rubber which of the following is obtained?
The letter $'D'$ in $D-glucose$ signifies____
The $ E_{{{M}^{3+}}/M{{n}^{2+}}}^{o} $ values for $ Cr, Mn, Fe $ and $ Co $ are $ -0.41,+1.57,+0.77 $ and $ +1.97\,V $ respectively. For which one of these metals the change in oxidation state from $+ 2$ to $+ 3$ is easiest?
The effective electrophile in aromatic. sulphonation is
The Henry?? law constant for the solubility of $N_2$ gas in water at $298\, K$ is $1.0 \times 10^5\, atm$. The mole fraction of $N_2$ in air is $0.8$. The number of moles of $N_2$ from air dissolved in $10$ moles of water at $298\, K$ and $5 \,atm$ pressure is
Excess of carbon dioxide is passed through $50 \,mL$ of $0.5\, M$ calcium hydroxide solution. After the completion of the reaction, the solution was evaporated to dryness. The solid calcium carbonate was completely neutralised with $0.1\, N$ Hydrochloric acid. The volume of Hydrochloric acid required is (At. mass of calcium = $40$)
Dipole moments of HCI = 1.03 D, HI= 0.38 D. Bond length of $HCl = 1.3 \mathring{A}$ and $HI = 1.6 \mathring{A}$. The ratio of fraction of an electric charge, e existing on each atom in HCl and HI is
Aspirin is
The extent of physisorption of an adsorbate increases with
Aluminium reacts with $NaOH$ and forms compound '$X$'. If the coordination number of aluminium in '$X$' is $6$, the correct formula of $X$ is
The type of bonds present in sulphuric anhydride are -
What are $X$ and $Y$ in the following reaction sequence? $C_2H_5OH \xrightarrow{Cl_2}(X) \xrightarrow{Cl_2} Y$.
$1.5 \,g$ of $CdCl_2$ was found to contain $0.9 \,g$ of $Cd$. Calculate the atomic weight of $Cd$.
What are $ABC$ in the following reactions ? (I) $(CH_2CO_2)_2Ca \xrightarrow{\Delta} A$ (II) $CH_3CO_2H \xrightarrow[\text{Red}]{HI} B$ (III) $2CH_3CO_2 \xrightarrow{P_4O_{10}} C$
Aluminium reacts with $NaOH$ and forms compound �$X$�. If the coordination number of aluminium in �$X$ � is $6$, the correct formula of $X$ is
How many '$mL$' of perhydrol is required to produce sufficient oxygen which can be used to completely convert $2L$ of $SO_2$ gas to $SO_3$ gas?
In Gattermann reaction, a diazonium group is replaced by using $\underline{Y} \underline{X}$and $\underline{Y}$ are
pH of a buffer solution decreases by $0.02 \,$ units when $0.12\, g$ of acetic acid is added to $250\, mL$ of a buffer solution of acetic acid and potassium acetate at $ 27^{\circ}C$. The buffer capacity of the solution is