List of top Chemistry Questions

E° for the cell, \(Zn|Zn^{2+} (aq) ||Cu^{2+} (aq)|Cu(s)\) is 1.01 V at 25°C. The equilibrium constant for the cell reaction \(Zn + Cu^{2+} (aq) ⇋ Cu+ Zn^{2+} (aq)\) is of the order of

In what manner will increase of pressure affect the following equation ?
\(C(s)+H_2O(g)⇋CO(g)+H_2(g)\)

Which of the following colligative properties can provide molar mass of proteins (or polymers or colloids) with greatest precision?

Which of the following act as epimeric pair?

Which of the following rare gas is the abundant in air?

If molarity of \(Cu^+2\) ions is 3x10^-4 express this in ppm 

$6g$ of graphite is burnt in a bomb calorimeter at $25^{\circ}C$ and $1\, atm$ pressure. The temperature of water increased from $25^{\circ}C$ to $30^{\circ}C$. If $\Delta H$ of this reaction is $-248 \,kJ\, mol^{-1}$, find out $C_v$ (in $kJ\, K^{-1}$) of bomb calorimeter.

Homoleptic octahedral complexes of a metal ion '${M^{3+} }$' with three monodentate ligands and $L_1, L_2, L_3$ absorb wavelengths in the region of green, blue and red respectively. The increasing order of the ligand strength is :

The peptide that gives positive ceric ammonium nitrate and carbylamine tests is :

The Mond process is used for the

The structures of beryllium chloride in the solid state and vapour, phase, respectively,are :

Peptization is a :

The process with negative entropy change is :

The primary pollutant that leads to photochemical smog is :

The IUPAC symbol for the element with atomic number $119$ would be :

$ {NO_2}$ required for a reaction is produced by the decomposition of $ {N2O5}$ in $ {CCl4}$ as per the equation $ { 2N2O5(g) -> 4NO2(g) + O2(g).}$ The initial concentration of $ {N2O5}$ is $3.00\, mol$ $ {L^{-1}}$ and it is $2.75\, mol$ $ {L^{-1}}$ after $30$ minutes. The rate of formation of $ {NO2}$ is :

The concentration of dissolved oxygen $(DO)$ in cold water can go upto :

The ratio of number of atoms present in a simple cubic, body centered cubic and face centered cubic structure are, respectively :

The compound used in the treatment of lead poisoning is :

The correct statements among (a) to (b) are: (a) saline hydrides produce $H_2$ gas when reacted with ${H2O}$. (b) reaction of $LiAH_4$ with $BF_3$ leads to $B_2H_6$. (c) $PH_3$ and $CH_4$ are electron - rich and electronprecise hydrides, respectively. (d) HF and $CH_4$ are called as molecular hydrides.

The correct order of the atomic radii of $C, Cs, Al$ and $S$ is :

The number of water molecule(s) not coordinated to copper ion directly in $CuSO_4.5H_2O$, is :

The lanthanide ion that would show colour is-

The decreasing order of electrical conductivity of the following aqueous solutions is : 0.1 M Formic acid (A), 0.1 M Acetic acid (B) 0.1 M Benzoic acid (C)

Molal depression constant for a solvent is $4.0\, kg\, mol^{-1}$. The depression in the freezing point of the solvent for $0.03\, mol\, kg^{-1}$ solution of $ {K2SO4}$ is : (Assume complete dissociation of the electrolyte)