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प्रश्न
Classify the following solid:
Pb
विकल्प
Molecular solid
Ionic solid
Covalent solid
Metallic solid
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उत्तर
Metallic solid
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संबंधित प्रश्न
Give an example each of a molecular solid and an ionic solid.
An ionic compound crystallises in FCC type structure with ‘A’ ions at the centre of each face and ‘B’ ions occupying corners of the cube. The formula of compound is _______.
Distinguish between crystalline solids and amorsphous solids.
Answer the following in one or two sentences.
A solid is hard, brittle and electrically nonconductor. Its melt conducts electricity. What type of solid is it?
Sodium crystallizes in bcc structure. If the edge length of unit cell is 4.3 × 10-8 cm, the radius of Na atom is ______.
Graphite and diamond are ____________.
Give any three characteristics of ionic crystals.
Classify the following solid.
Brass
Classify the following solid.
Iodine
Which among the following is not true for crystalline solid?
Nature of binding forces present in carbon dioxide molecules in solid state are ____________.
Order of increasing melting points among H2O(s), C(s), CS2 and Sn is ____________.
Ionization enthalpy is lowest in ____________.
The compound, found in nature in gas phase but ionic in solid state is ____________.
Solid CH4 is ____________.
Which of the following is not true about the ionic solids?
An excess of potassium ions makes KCl crystals appear violet or lilac in colour since:
(i) some of the anionic sites are occupied by an unpaired electron.
(ii) some of the anionic sites are occupied by a pair of electrons.
(iii) there are vacancies at some anionic sites.
(iv) F-centres are created which impart colour to the crystals.
Why are liquids and gases categorised as fluids?
A crystal with a ≠ b ≠ c and α = β = γ = 90° is
Who introduced the term covalent bond?
Calculate the angle at which first order reflection will occurs in an X-ray spectrometer when x ~ rays of wavelength \[\ce{1.54 \overset{\circ}{A}}\] are diffracted by the atoms of a crystal given that inter planer distance is \[\ce{0.04 \overset{\circ}{A}}\]
A reddish-pink substance on heating gives off a vapour which condenses on the sides of the test tube and the substance turns blue. If on cooling water is added to the residue it turns to original colour. The substance is ______.
Which of the following is not correct?
Mention the res of the following solid:
CO2
What are intermolecular forces of attraction involved in molecular crystals?
