List of top Chemistry Questions

Which of the following statements is true for the carbonyl group?
Which of the following is called as Mandelonitrile?
Which among the following group-15 elements does NOT react with concentrated sulfuric acid?
A first-order reaction has rate constant \(1 \times 10^{-2} \, \text{s}^{-1}\). What time will it take for 20 g of reactant to reduce to 5 g?
Identify the tetradentate ligand from the following.
If 38.55 kJ of heat is absorbed when 6.0 g of O\(_2\) react with ClF according to the reaction: \[ \text{2ClF(g)} + \text{O}_2(g) \rightarrow \text{Cl}_2\text{O}(g) + \text{OF}_2(g) \] What is the standard enthalpy of reaction?
Identify the element having the highest enthalpy of atomization from the following.
Which among the following ore is concentrated by froth flotation process?
An ideal gas expands isothermally and reversibly from 10m\(^3\) to 20m\(^3\) at 300K, performing 5×10\(^3\) J of work on surroundings, calculate number of moles of gas used?
Which among the following polymers is obtained from styrene and 1-3-Butadiene?
Which of the following molecule contains 50% p\(_\pi\) character of hybrid orbital in C atom?
Identify the product obtained when benzamide is treated with bromine and aqueous sodium hydroxide.
Which among the following lanthanoids shows only +3 oxidation state?
Mixture of iodine and Sodium Sulphate is separated by .........
Identify the symbol used for water according to Dalton's atomic theory.
A sample of gas absorbs 4000 kJ of heat and surrounding does 2000 J of work on sample. What is the value of \(\Delta U\)?
Which among the following amino acids has the lowest molar mass?
How many electrons are involved in the reaction when 0.40 F of electricity is passed through an electrolytic solution?
Which of the following alcohols needs acidic KMnO\(_4\) to convert it into aldehyde or ketone?
A compound has fcc structure. If density of unit cell is 3.4 g cm$^{-3$, what is the edge length of unit cell? (Molar mass = 98-99)}
Which among the following is an example of allylic alcohol?
Identify the neohhexyl chloride from the following.
An ideal gas expands from 1 × 10\(^-3\) m\(^3\) to 1 × 10\(^-2\) m\(^3\) at 300 K against a constant external pressure of 1 × 10\(^5\) N/m\(^2\). Work done is
Which of the following oxide of nitrogen is coloured?
The coordination number of the sphere in cubic close packed (ccp) structure is