Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- A solution of sodium sulfate contains 92 g of Na^+ ions per kilogram of water. The molality of Na^+ ions in that solution in mol...
- 5 moles of AB_2 weigh 125 10^ -3 kg and 10 moles of A_2B_2 weigh 300 10^ -3 kg. The molar mass of A (M_A) and molar mass of B...
- A 10 mg effervescent tablet containing sodium bicarbonate and oxalic acid releases 0.25 ml of CO_2 at T = 298.15 K and p = 1 bar....
- The amount of sugar (C_ 12 H_ 22 O_ 11 ) required to prepare 2 L of its 0.1 M aqueous solution is:
- 25 g of an unknown hydrocarbon upon burning produces 88 g of CO_2 and 9 g of H_2O. This unknown hydrocarbon contains:
- The ammonia ( NH_3 ) released on quantitative reaction of 0.6 g urea ( NH_2CONH_2 ) with sodium hydroxide (NaOH) can be...
- 10.30 mg of O_2 is dissolved into a liter of sea water of density 1.03 g/mL. The concentration of O_2 in ppm is ______.
- The molarity of HNO_3 in a sample which has density 1.4 g/mL and mass percentage of 63% is __________. (Molecular Weight of HNO_3...
- The hardness of a water sample containing 10^ -3 M MgSO_4 expressed as CaCO_3 equivalents (in ppm) is __________. (molar mass of...
- 6.023 10^ 22 molecules are present in 10 g of substance 'x'. The molarity of a solution containing 5 g of substance 'x' in 2L...
- The volume (in mL) of 0.1 N NaOH required to neutralise 10 mL of 0.1 N phosphinic acid is .................... .
- 10 mL of gaseous hydrocarbon of combustion gives 40 mL of CO_2(g) and 50 mL of water vapour. Total number of carbon and hydrogen...
- Consider the following reaction: 3PbCl_2 + 2(NH_4)_3PO_4 → Pb_3(PO_4)_2 + 6NH_4Cl. If 72 mmol of PbCl_2 is mixed with 50 mmol of...
- The Molarity (M) of an aqueous solution containing 5.85 g of NaCl in 500 mL water is: (Given: Molar Mass Na: 23 and Cl: 35.5...
- 9.3 g of pure aniline is treated with bromine water at room temperature to give a white precipitate of the product 'P'. the mass...
- The number of moles of methane required to produce 11g CO_2(g) after complete combustion is: (Given molar mass of methane in g...
- In the Claisen-Schmidt reaction to prepare 351 g of dibenzalacetone using 87 g of acetone, the amount of benzaldehyde required is...
- The density of 'x' M solution ('x' molar) of NaOH is 1.12 g mL⁻¹, while in molality, the concentration of the solution is 3 m (3...
- The volume (in mL) of 0.125 M AgNO_3 required to quantitatively precipitate chloride ions in 0.3 g of [ Co(NH_3)_6 ] Cl_3 is...
- The ratio of the mass percentages of 'C & H' and 'C & O' of a saturated acyclic organic compound 'X' are 4 : 1 and 3 : 4...
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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