List of top Chemistry Questions

Among the following oxoacids, the correct decreasing order of acidic strength is
Which of the following statements about $Na_2O_2$ is not correct?
The protein component of a holoenzyme is known as
The volume of ethyl alcohol (density $1.15\, g/cc$) that has to be added to prepare $100\,cc$ of $0.5\, M$ ethyl alcohol solution in water is
The compressibility factor $(Z)$ of one mole of a van der Waals gas of negligible $�a�$ value is
$\left(_{32}Ge^{76}, _{34}Se^{76}\right)$ and $\left(_{14}Si^{30}, _{16}S^{32}\right)$ are examples of
The order of decreasing ease of abstraction of Hydrogen atoms in the following molecule is
Calculate the energy in joule corresponding to light of wavelength 45 nm:
(Planck’s constant h = 6.63 × 10-34 Js; speed of light c = 3 × 108 ms-1)
For a given exothermic reaction, $K_p$ and $K_p'$ are the equilibrium constants at temperatures $T_1$ and $T_2$, respectively. Assuming that heat of reaction is constant in temperature range between $T_1$ and $T_2$, it is readily observed that :-
In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from $0.75\, g$ of sample neutralized $10\, mL$ of ${1 \, M \, H_2SO_4}$. The percentage of nitrogen in the soil is :
$Be^{2+}$ is isoelectronic with which of the following ions?
The pair of compounds that can exist together is
The formal potential of $Fe ^{3+} / Fe ^{2+}$ in a sulphuric acid and phosphoric acid mixture $\left(E^{\circ}=+0.61 \,V \right)$ is much lower than the standard potential $\left(E^{\circ}=+0.77 \,V \right) .$ This is due to
Among the following statements about the molecules $X $ and $Y$, the one (s) which is (are) correct is (are)
The disease that occurs in mature adult human being due to deficiency of calciferol is
The $4^{th}$ higher homologue of ethane is
The structure of $XeF_6$ is experimentally determined to be distorted octahedron. Its structure according to VSEPR theory is
$2.76\, g$ of silver carbonate on being strongly heated yields a residue weighing
For the reaction, 3A + 2B $\to$ C + D, the differential rate law can be written as :
A gaseous reaction $X_2(g) \to Y + \frac{1}{2} Z(g)$ There is increase in pressure from $100 \,mm$ to $120 \,mm$ in $5$ minutes. The rate of disappearance of $X_2$ is
Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human beings?
The reaction of aqueous $KMnO_4$ with $ H_2O_2 $ in acidic conditions gives
The correct order of bond dissociation energy among $N_2, O_2, O_2^-$ is shown in which of the following arrangements ?
The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is
Reason of lanthanoid contraction is