Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- 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
- 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 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:
- 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:
- The oxide of a metal contains 60 % of the metal. What will be the percentage of bromine in the bromide of the metal, if the...
- The normality of 0.3 M phosphorous acid ( H_3PO_3 ) is :
- The term atom molecule were introduced by:
- 1.60 g of a metal were dissolved in HNO_3 to prepare its nitrate. The nitrate on strong heating gives 2 g oxide. The equivalent...
- If one mole of H_2SO_4 reacts with an excess of NaOH, how many moles of water are formed?
- 1.0 g of hydrogen contains 6 10^ 23 atoms. The atomic weight of helium is 4. If follows that the number of atoms in 1 g of He is:
- The equivalent weight of a divalent metal is 31.82. The weight of single atom is:
- 100 mL of PH_3 when decomposed produces phosphorus and hydrogen. The change in volume is:
- The maximum amount of BaSO_4 precipitated on mixing 20 mL of 0.5 M BaCl_2 with 20 mL of 1 M H_2SO_4 is:
Other chapters
Alcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAlternating CurrentAminesAnatomy of Flowering PlantsAncient Indian HistoryAnimal KingdomApplication of DerivativesArea Under CurveAromatic Compounds and Aryl HalidesAtomsBasic Mathematics and LogarithmBinomial TheoremBiodiversity and ConservationBiological ClassificationBiomoleculesBiotechnology and Its ApplicationsBiotechnology: Principles and ProcessesBody Fluids and CirculationBreathing and Exchange of GasesCell Cycle and Cell DivisionCell: The Unit of LifeChemical Bonding and Molecular StructureChemical Coordination and Integration