List of top Chemistry Questions

Which of the following pairs give positive Tollen’s test?
Which of the following does not represent the correct order of the property indicated?
Following process is known as?
2.76 g of silver carbonate on being strongly heated yields a residue weighing?
The bond angles of \( \text{NH}_3 \), \( \text{NH}_2 \), and \( \text{NH}_4^+ \) are?
The final product (IV) in the sequence of reactions is?
A gaseous mixture containing He, CH4, and SO2 was allowed to effuse through a fine hole. Then find what molar ratio of gases coming out initially? (Given mixture contains He, CH4, and SO2 in 1:2:3 molar ratio)
According to Bohr’s theory, the angular momentum for an electron of third orbit is?
In the sequence of reactions, the final product (IV) is?
In the reaction, \[ 8Al + 3Fe_2O_3 \longrightarrow 4Al_2O_3 + 9Fe \] the number of electrons transferred from the reductant to the oxidant is?
An \( f \)-shell containing 6 unpaired electrons can exchange?
The standard molar heat of formation of ethane, CO2, and water (\( \Delta H_f \)) are respectively -21.1, -94.1, and -68.3 kcal. The standard molar heat of combustion of ethane will be?
Which sequence of reactions shows correct chemical relation between sodium and its compounds?
The half-life of two samples are 0.1 and 0.8 S. Their respective concentration are 400 and 0.5. The order of the reaction is?
The equivalent conductivity of a solution containing 2.54g of CuSO4 per liter is 91.0 \( \Omega^{-1} \, \text{cm}^2 \). The conductivity would be?
The solubility product of \( \text{Ag}_2 \text{CrO}_4 \) is \( 3.2 \times 10^{-12} \). What is the concentration of \( \text{CrO}_4^{2-} \) ions in that solution?
Among [Fe(H2O)6]3+, [Fe(CN)6]3-, [Fe(CO)6]3- species, the hybridization state of the Fe atom is?
The rate constant for forward reaction and backward reaction of hydrolysis of ester are \( 1.1 \times 10^{-2} \) and \( 1.5 \times 10^{-3} \) per minute respectively. Equilibrium constant for the reaction is?
Which of the following hydrogen bonds are strongest in vapour phase?
MnO4- + 8H+ + 5e- → Mn2+ + 4H2O; \( E^\circ = 1.51 \, \text{V} \) MnO4- + 4H+ + 2e- → Mn2+ + 2H2O; \( E^\circ = 1.23 \, \text{V} \)
A metal has bcc structure and the edge length of its unit cell is 3.04 Å. The volume of the unit cell in cm³ will be?
A 1.0 M NaOH reacts with 20 mL of HCl solution for complete neutralisation. The molarity of HCl solution is?
The volume strength of 1.5 N H2O2 solution is?
The sodium extract of an organic compound on acidification with acetic acid and addition of lead acetate solution gives a black precipitate. The organic compound contains?
1.0 g of magnesium is burnt with 0.56 g O2 in a closed vessel. Which reactant is left in excess and how much ?
(At. wt. Mg =24; O=16)