Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- Molality (m) of 3 M aqueous solution of NaCl is: (Given: Density of solution = 1.25 g mL⁻¹, Molar mass in g mol⁻¹: Na-23, Cl-35.5)
- Combustion of glucose (C₆H₁₂O₆) produces CO₂ and water. The amount of oxygen (in g) required for the complete combustion of 900 g...
- A solution is prepared by adding 1 mole ethyl alcohol in 9 mole water. The mass percent of solute in the solution is _______...
- The mass of ammonia in grams produced when 2.8 kg of dinitrogen quantitatively reacts with 1 kg of dihydrogen is _______ .
- A 100 mL solution was made by adding 1.43 g of Na_2CO_3.xH_2O . The normality of the solution is 0.1 N. The value of x is...
- The minimum number of moles of O_2 required for complete combustion of 1 mole of propane and 2 moles of butane is ______.
- 1 gram of sodium hydroxide was treated with 25 mL of 0.75 M HCl solution, the mass of sodium hydroxide left unreacted is equal to
- What mass of 95% pure CaCO_3 will be required to neutralise 50 mL of 0.5 M HCl solution according to the following reaction? CaCO...
- The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1. It has two carbon atoms. The weight (in g) of CO₂(g)...
- Complete combustion of X g of an organic compound gave 0.25 g of CO₂ and 0.12 g of H₂O. If the % of carbon is 25% and of hydrogen...
- The mass of iron converted into Fe₃O₄ by the action of 18 g of steam is: (Given: Molar mass of H, O and Fe are 1, 16 and 56 g...
- 5.33 g of CrCl₃·6H₂O, which is a 1 : 3 electrolyte, is dissolved in water and is passed through a cation exchanger. The chloride...
- 2.0 g of a bromo hydrocarbon (X) was subjected to Carius analysis, gave 3.36 g of AgBr. The percentage of carbon in the compound...
- The correct order of total number of atoms present in (A) 2 moles of cyclohexane (B) 684 g of sucrose (C) 90.8 L of dihydrogen at...
- Which of the following contain the same number of atoms? (Given: Molar mass in g mol⁻¹ of H, He, O and S are 1, 4, 16 and 32...
- An oxide of iron contains 69.9% iron, its empirical formula, is: (Given: Molar mass of Fe and O are 56 and 16 g mol⁻¹...
- Match List-I with List-II. List-I (Mass of substance): A. 1.8 mg water, B. 9.8 mg sulphuric acid, C. 1.8 mg carbon, D. 5.85 mg...
- An organic compound contains 78% (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula...
- Molarity (M) of an aqueous solution containing x g of anhyd. CuSO₄ in 500 mL solution at 32 °C is 2 × 10⁻¹ M. Its molality will...
- Volume of 3 M NaOH (formula weight 40 g mol⁻¹) which can be prepared from 84 g of NaOH is ____ × 10⁻¹ dm³.
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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