Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- Haemoglobin contains 0.3465% of iron. One molecule of haemoglobin contains 4 atoms of iron. The molecular mass of haemoglobin is...
- 2 moles of O_2 are formed in the following reaction with 66.67% yield: 2 KClO _3 2 KCl +3 O _2. How many moles of KClO_3 are...
- What mass of CH_4 (in grams) produces 3.01 10^ 23 H_2O molecules when burnt in excess of O_2?
- How many moles of SO_3 are present in 3 moles of oleum?
- Silicon and hydrogen form a series of compounds with the general formula Si_xH_y. A 6.22 g sample of the compound is burnt in...
- A 1 M aqueous solution of dibasic sulphuric acid ( H _2 SO _4) undergoes complete neutralisation with NaOH . Its normality (z, in...
- How much urea is present in 16 g of 10 molal urea solution?
- What is the n-factor (number of H ^+ ions neutralised per mole of base) of a diacidic base such as Ba(OH) _2 in a complete...
- 22.4 L of CO_2 at STP is passed into 2 L of 4 M NaOH solution. What is the molarity of the resulting (excess NaOH) solution?
- We want to prepare 2 L of 0.025 M CH_3COOH solution. Amount of CH_3COOH to be dissolved is ___________
- 2.78 g FeSO_4 xH_2O in 100 mL solution gives 0.1 M solution. Thus, x = ___________
- 1.575 g of a dibasic acid H_2C_2O_4 xH_2O in 250 mL solution is 0.1 N. What is the value of x?
- H_2SO_4 (d=1.8 g/cc) is 49% by weight of solution. What is the molar concentration of H_2SO_4?
- A solution of 6 N H_3PO_4 is x M H_3PO_4. What is the value of x?
- 250 mL of 0.1 M NaOH contains x g of NaOH. Thus, x is ___________
- 6.3 g of an acid (molar mass = 126 g mol^ -1 ) reacts completely with 100 mL of 0.5 M Ca(OH)_2 solution. Thus, basicity of acid...
- 0.84 g of a metal carbonate reacts with 40 mL of N/2 H_2SO_4. The equivalent weight of the metal carbonate is:
- Molecular weight of oxalic acid is 126. The weight of oxalic acid required to neutralise 1000 mL of normal NaOH solution is:
- 100 mL of 0.3 N HCl solution were mixed with 200 mL of 0.6 N H_2SO_4 solution. The final acidic normality is:
- Equivalent weight of NH_3 as a base is:
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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