Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- On complete combustion 1.0g of an organic compound (X) gave 1.46 g of CO₂ and 0.567 g of H₂O. The empirical formula mass of...
- CaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + CO₂(g) + H₂O(l) Consider the above reaction, what mass of CaCl₂ will be formed if 250 mL of...
- Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is Given: Molar mass of...
- 10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a beaker. Now, 10 mL of this mixture is poured into a...
- X g of nitrobenzene on nitration gave 4.2 g of m–dinitrobenzene. X = _________ g. (nearest integer) [Given: molar mass (in g mol^...
- Among 10⁻⁹ g (each) of the following elements, which one will have the highest number of atoms? Element: Pb, Po, Pr and Pt
- 0.5 g of an organic compound on combustion gave 1.46 g of CO_2 and 0.9 g of H_2O. The percentage of carbon in the compound is...
- Fortification of food with iron is done using FeSO4.7H2O. The mass in grams of the FeSO4.7H2O required to achieve 12 ppm of iron...
- 20 mL of sodium iodide solution gave 4.74 g silver iodide when treated with excess of silver nitrate solution. The molarity of...
- Sea water, which can be considered as a 6 molar (6 M) solution of NaCl, has a density of 2 g mL^ -1 . The concentration of...
- The amount of calcium oxide produced on heating 150 kg limestone (75% pure) is _____ kg. (Nearest integer) Given: Molar mass (in...
- Butane reacts with oxygen to produce carbon dioxide and water following the equation given below. C_4H_ 10 (g) + 13 2 O_2(g)...
- 1 gram of a carbonate ( M_2CO_3 ) on treatment with excess HCl produces 0.01186 mole of CO_2 . The molar mass of M_2CO_3 in g...
- The most abundant elements by mass in the body of a healthy human adult are : Oxygen (61.4%), Carbon (22.9 %), Hydrogen (10.0%)...
- An unknown chlorohydrocarbon has 3.55 % of chlorine. If each molecule of the hydrocarbon has one chlorine atom only, chlorine...
- Assuming ideal gas behaviour, the ratio of density of ammonia to that of hydrogen chloride at same temperature and pressure is :...
- The percentage composition of carbon by mole in methane is:
- For a reaction, N_2(g) + 3H_2(g) → 2NH_3(g); identify dihydrogen (H_2) as a limiting reagent in the following reaction mixtures.
- For per gram of reactant, maximum quantity of N_2 gas is produced in which of the following thermal decomposition reactions ?...
- For the following reaction, the mass of water produced from 445 g of C_ 57 H_ 110 O_6 is: 2C_ 57 H_ 110 O_6(s) + 163O_2(g) →...
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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