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Write the type of magnetism observed when the magnetic moments are aligned in parallel and anti-parallel directions in unequal numbers.
Concept: Properties of Solids: Magnetic Properties
Which stoichiometric defect decreases the density of the crystal?
Concept: Imperfections in Solids - Introduction
Explain ionic solids are hard and brittle.
Concept: Classification of Crystalline Solids
Define Molarity (M).
Concept: Expressing Concentration of Solutions
Write one difference in Coagulation and Peptization
Concept: Colligative Properties and Determination of Molar Mass
Based on the nature of intermolecular forces, classify the following solids:
Sodium sulphate, Hydrogen
Concept: General Characteristics of Solid State
What happens when CdCl2 is doped with AgCl?
Concept: Imperfections in Solids >> Types of Point Defects - Impurity Defects
How will you convert the following in not more than two steps:
Benzoic acid to Benzaldehyde
Concept: Abnormal Molar Masses
How will you convert the following in not more than two steps:
Acetophenone to Benzoic acid
Concept: Abnormal Molar Masses
30 g of urea (M = 60 g mol−1) is dissolved in 846 g of water. Calculate the vapour pressure of water for this solution if vapour pressure of pure water at 298 K is 23·8 mm Hg.
Concept: Vapour Pressure of Liquid >> Vapour Pressure of Solutions of Solids in Liquids
What is meant by negative deviation from Raoult's law? Give an example. What is the sign of ∆mixH for negative deviation?
Concept: Vapour Pressure of Liquid >> Vapour Pressure of Liquid- Liquid Solutions
Calculate the mass of NaCl (molar mass = 58.5 g mol−1) to be dissolved in 37.2 g of water to lower the freezing point by 2°C, assuming that NaCl undergoes complete dissociation. (Kf for water = 1.86 K kg mol−1)
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure
Account for the following :
H2S has lower boiling point than H2O.
Concept: Colligative Properties and Determination of Molar Mass >> Elevation of Boiling Point
Which of the two components of starch is water soluble?
Concept: Colligative Properties and Determination of Molar Mass >> Reverse Osmosis and Water Purification
Define an ideal solution and write one of its characteristics.
Concept: Ideal and Non-ideal Solutions
Account for the following:
PCl5 is more covalent than PCl3.
Concept: Properties of Solids: Electrical Properties >> Conduction of Electricity in Metals
Some liquids on mixing form 'azeotropes'. What are 'azeotropes'?
Concept: Vapour Pressure of Liquid >> Vapour Pressure of Liquid- Liquid Solutions
State Henry's Law. What is the effect of temperature on the solubility of a gas in a liquid?
Concept: Solubility >> Solubility of a Gas in a Liquid
What type of intermolecular attractive interaction exists in the pair of methanol and acetone?
Concept: Ideal and Non-ideal Solutions
State Raoult's law for the solution containing volatile components. What is the similarity between Raoult's law and Henry's law?
Concept: Vapour Pressure of Liquid >> Vapour Pressure of Solutions of Solids in Liquids
