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Draw the structures of veronal and thymine.
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Identify A and B respectively in the following reaction:
\[\ce{tert-butyl alcohol ->[20‰H2SO4][363K] A + H2O ->[HBr][H2O2] B}\]
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How are the crystalline solids classified?
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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?
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Answer the following in brief.
Distinguish between ionic solids and molecular solids
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The conjugate base of [Zn(H2O)4]2⊕ is __________.
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Answer the following in one sentence :
Why cations are Lewis acids?
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What are acids and bases according to Arrhenius theory?
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What is meant by conjugate acid-base pair?
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Label the conjugate acid-base pair in the following reaction:
\[\ce{HCl + H2O ⇌ H3O\overset{\oplus} + Cl\overset{\ominus}{}}\]
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Label the conjugate acid-base pair in the following reaction:
\[\ce{CO^2-_3 + H2O ⇌ OH- + HCO^-_3}\]
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Answer the following in brief :
Write a reaction in which water acts as a base.
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Ammonia serves as a Lewis base whereas AlCl3 is Lewis acid. Explain.
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Choose the most correct option.
Two solutions have the ratio of their concentrations 0.4 and ratio of their conductivities 0.216. The ratio of their molar conductivities will be ______.
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What is a cell constant? What are its units? How is it determined experimentally?
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Answer the following in one or two sentences.
Write the relationship between conductivity and molar conductivity and hence unit of molar conductivity.
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Answer the following in brief.
Explain the effect of dilution of the solution on conductivity.
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What is Kohlrausch law of independent migration of ions? How is it useful in obtaining molar conductivity at zero concentration of a weak electrolyte? Explain with an example.
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Answer the following.
The first ionization enthalpies of S, Cl, and Ar are 1000, 1256 and 1520 kJ/mol-1, respectively. Explain the observed trend.
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Explain the trend in following atomic properties of group 16 elements:
Atomic radii
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