List of top Chemistry Questions

The monomers of Buna-$S$ rubber are
A compound is formed by elements $A$ and $B$. This crystallises in the cubic structure where the $A$ atoms are at the corners of the cube and $B$ atoms are at the body centers. The simplest formula of the compound is
When acetamide is treated with $ Br_2 $ and caustic soda, the product formed is
When $AgNO _{3}$ solution is added in excess to $1\, M$ solution of $CoCl _{3} \cdot x NH _{3}$, one mole of $AgCl$ is formed. What is the value of $x$ ?
Which one of the following forms an alcohol with nitrous acid?
Which one of the following forms a green solid with nitrous acid?
Buffer capacity of a buffer will be maximum when
Dissociation constant of a weak acid is $10^{-5}$. The pH of 0.1 M solution of this acid is
Which one of the following has maximum magnetic moment?
Nitrogen is obtained by heating
Cryoscopic constant is the depression in the freezing point produced by
The Ostwald's dilution law is obeyed by
Which one of the following forms oleum when dissolved in cone $ {H_2SO_4}$ ?
The EMF of a cell containing sodium/copper electrodes is 3.05 V. If the electrode potential of copper electrode is + 0.34 V the electrode potential of sodium is
Iodine value is used to determine
$+I$ effectis exhibited by
Cuprammonium ion is having
The adsorption of inert gases on the surface of activated charcoal increases with
How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
Base strength of (i) $h_3C \, {C} ^{\ominus} H_2$ (ii) $H_2 C= {C}^{\ominus} H$ (iii) $H-C \equiv C^{\ominus} $ is in the order of
On the basis of the following $E^0 $ values, the strongest oxidising agent is $[Fe(CN)_6]^{4-} \rightarrow [Fe(CN)_6]^{3-}+e^-; $ $\hspace15mm E^0=-0.35 V $ $Fe^{2+} \rightarrow Fe^{3+} + e^-;E^0=-0.77 V $
The rate constants $k_1$ and $k_2$ for two different reactions are $10^{16} .e^{-2000/T}$ and $10^{15} .e^{-1000/T}$,respectively. The temperature at which $k_1= k_2$ is
In which of the following coordination entities the magnitude of $\Delta_0$ (CFSE in octahedral field) will be maximum? (At. no. of Co = 27)
-The stability of carbanions in the following (i) $RC \equiv {C}^{\ominus}$ (iii) $R_2C = {CH}^{\ominus}$ (iv) $R_3C = {CH_2}^{\ominus}$ , is in the order of
An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be