List of top Chemistry Questions

What is the ratio of mass of nitrogen that combines with 16 parts by weight of oxygen in $\text{N}_2\text{O}, \text{NO}, \text{NO}_2$ ?
Which among the following is the strongest acid?
Calculate the molar mass of an element having density $19.2 \text{ g cm}^{-3}$ if it forms fcc structure $\left[ \text{a}^3 \times \text{N}_{\text{A}} = 40 \text{ cm}^3 \text{ mol}^{-1} \right]$}
Which from following is a semisynthetic polymer?
Which from following statements is NOT true about physisorption?
Which of the following equation exhibits integrated rate law equation for first order reaction?
Which from following groups exhibits +I effect?
Identify the product 'C' formed in the following series of reactions. Reaction: Bromoethane $\xrightarrow{\text{Mg / dry ether}}$ A $\xrightarrow{\text{H}_2\text{O / dry ether}}$ B $\xrightarrow{\text{Br}_2 / \text{UV}}$ C
What is the name of isopropyl alcohol according to carbinol system?
Calculate the Henry's law constant at $25^\circ\text{C}$ if solubility of gas in liquid is $2.1 \times 10^{-2} \text{ moldm}^{-3}$ at $0.18 \text{ bar}$.
What is the number of chiral carbon atoms and number of formyl groups respectively present in ribose?
Which from the following equations represents the relation between solubility ( $\text{mol L}^{-1}$ ) and solubility product for the salt $\text{B}_2\text{A}$ ?
The entropy of vaporisation of benzene is $85 \text{ J K}^{-1} \text{ mol}^{-1}$. When 117 g of benzene vaporises at its boiling point, what is entropy change of surrounding if process is at equilibrium?
Which element from following does NOT exhibit magnetic moment in +1 state?
Assertion (A): Silicones are used in surgical and cosmetic plants Reason (R): Silicones have high thermal stability
Identify the reaction in which hydrogen gas is not liberated
The products formed in the reaction of \( BeCl_2 \) with \( LiAlH_4 \) are
Identify the correct statements from the following: I. \( H_2O_2 \) oxidizes PbS to \( PbSO_4 \)
II. \( H_2O_2 \) is used in the industrial preparation of sodium perborate
III. \( H_2O_2 \) is insoluble in water
The electron gain enthalpy (in kJ/mol) of oxygen, sulphur, selenium respectively are
Identify the correct statements from the following: I. Conjugate base of chloric acid is \( ClO^- \)
II. \( AlCl_3 \) is a Lewis acid
III. Conjugate base of \( NH_3 \) is \( NH_2^- \)

At T(K), the following graph is obtained for an ideal gas.

Which of the following graphs correctly represents the work done on the gas (shaded part)?

A hydrocarbon has 85.7% of carbon by weight. 56 g (2 moles) of hydrocarbon was completely burnt in oxygen and obtained \( CO_2 \) and \( H_2O \). What is the weight (in g) of \( CO_2 \) formed? - (C = 12 u, H = 1 u, O = 16 u)

What is the correct equation that relates kinetic energy (\(E_{\text{ke}}\)) and pressure (\(P\)) of one mole of an ideal gas? - (V = Volume)
Identify the number of molecules having permanent dipole moment from the following: $$ CCl_4, NF_3, H_2S, HBr, SF_4, SiF_4, XeF_4, BeCl_2, SnCl_2, BrF_5, SO_2 $$
Among the following, the molecule in which all atoms obey the octet rule is