Chemistry questions
29404 published questions with worked solutions.
- Which of the following sets of compounds correctly illustrate the law of reciprocal proportions?
- Number of atoms in 12 g ^ 24 _ 12 Mg is equal to
- To make 0.01 mole, which of the following has maximum mass?
- The mass of 11.2 L of ammonia gas at STP is
- The number of gram atoms of oxygen in 6.02 10^ 24 CO molecules is
- Mass of the solution of 1 molal glucose solution to get 0.2 mole of glucose is
- The number of Cl^- ions present in 222 g anhydrous CaCl_2 is
- By heating 10 g CaCO_3 , 5.6 g CaO is formed. The weight of CO_2 obtained in this reaction is
- The ratio of mole fraction of a solute and a solvent in a binary solution is:
- The law of definite proportions is not applicable to nitrogen oxide because
- If 20% nitrogen is present in a compound, it's minimum molecular weight will be:
- A sample of a mixture of CaCl_2 and NaCl weighing 4.22 g was treated to precipitate all the Ca as CaCO_3 . This CaCO_3 is then...
- Dissolving 120 g of urea (mol.wt.60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is:
- The number of atoms in 3.2 g of oxygen gas are:
- A solution contains Na_2CO_3 and NaHCO_3 . 10 mL of the solution required 2.5 mL of 0.1 M H_2SO_4 for neutralization using...
- The molality of 15% (wt./vol.) solution of H_2SO_4 of density 1.1 g/cm^3 is approximately:
- The number of moles of water present in 90 g of a water is:
- An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 mL. The volume of 0.1 N NaOH required to completely...
- To neutralise completely 20 mL of 0.1 M aqueous solution of phosphorous acid ( H_3PO_3 ), the volume of 0.1 M aqueous KOH...
- One g of a mixture of Na_2CO_3 and NaHCO_3 consumes y equivalent of HCl for complete neutralisation. One g of the mixture is...