List of top Chemistry Questions

An example of pseudo first order reaction is
N$_2$ exerts a partial pressure of 7.648 bar when dissolved in 1 litre of water at 298 K. What is the mole fraction of N$_2$ at same temperature (Henry's law constant $(K_H)$ for N$_2$ at 298 K = 76.4 kbar)
The resistance of 0.10 M KCl solution when measured with a conductivity cell at 298 K is 100 \(\Omega\). If the conductivity of 0.10 M KCl solution is 1.29 S m\(^{-1}\), what is the value of cell constant of the same solution at 298 K
In the following reaction, the change in oxidation state of Magnesium is: 3Mg(s) + N2(g) → Mg3N2(s)
An aqueous solution of which of the following has the highest pH value
Consider the following thermodynamic properties of a system: (i) Volume (ii) Pressure (iii) Density (iv) Heat capacity. The extensive property/properties of the system is/are
Which of the following relationship is correct
Which one of the following molecule/ion has square planar shape
In which one of the following compounds, there is complete octet of central atom
The IUPAC name of element with atomic number 105 is
The inert gas element with the largest positive electron gain enthalpy is
The product of uncertainty in position \((\Delta x)\) and uncertainty in velocity \((\Delta v)\) has the unit of
In which of the following spectral region Balmer series lines are observed for atomic hydrogen
Amylose is a water-soluble part of starch. What is the percentage solubility of it?
Which of the following group shows $-R$ effect?
Calculate the relative lowering of vapour pressure of solution containing 3 g urea in 50 g water. [molar mass of urea = 60 g mol$^{-1}$ ]}
Choose the correct statements of the following. (i) Bases would be soapy when touched.
(ii) Malic acid is present in apples.
(iii) Stearic acid is present in fats.
(iv) Tooth paste is acidic in nature.
Which of the following elements is highly reactive?
The solubility product of NiS is $4.9 \times 10^{-5}$ at 298 K . Calculate its solubility in moldm$^{-3}$ at the same temperature?
Nitric oxide reacts with H$_2$ according to reaction. 2NO$_{(\text{g})}$ + 2H$_{2(\text{g})}$ $\to$ N$_{2(\text{g})}$ + 2H$_2$O$_{(\text{g})}$.
Identify the correct relationship for consumption of reactant and formation of product.
What is the coordination number of central metal ion if it forms octahedral complex?
Which carbon atoms of $\alpha - D$ glucose and $\beta - D$ fructose respectively forms glycosidic linkage in sucrose?
Calculate the number of atoms present in 1 g of an element if it forms fcc unit cell structure. [$\rho \times \text{a}^3 = 6.8 \times 10^{-22} \text{ g}$]}
Calculate the enthalpy of solution of potassium chloride if its $\Delta_{\text{L}\text{H} = 700 \text{ kJ mol}^{-1}$ and $\Delta_{\text{hyd}} \text{ H} = -680 \text{ kJ mol}^{-1}$
Which of the following is the molecular formula of halous acid of chlorine?