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Haloarenes are less reactive than alkyl halides towards nucleophilic substitution because ____________ in aryl halide.
Concept: undefined >> undefined
The three electrons have the following set of quantum numbers:
X = 6, 1, −1, `+1/2`
Y = 6, 0, 0, `+1/2`
Z = 5, 1, 0, `+1/2`
Identify the CORRECT statement.
Concept: undefined >> undefined
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What is the entropy change (in J K−1 mol−1) when one mole of ice is converted into water at 0°C? (The enthalpy change for the conversion of ice to liquid water is 6.0 kJ mol−1 at 0°C)
Concept: undefined >> undefined
In how many of the following, ∆S is positive?
i. Melting of ice
ii. Sublimation of iodine
iii. Dissolution of CuSO4 in water
iv. Condensation of water vapour
v. Dissociation of H2 molecule into atoms
vi. Conversion of carbon dioxide gas to dry ice
vii. Vaporization of acetone
Concept: undefined >> undefined
The only radioactive element among the lanthanoids is ____________.
Concept: undefined >> undefined
How many electrons can fit in the orbital for which n = 4 and l = 2?
Concept: undefined >> undefined
In which of the following, ∆S is positive?
Concept: undefined >> undefined
The hybridization of nickel in [NiCl4]2− and [Ni(CN)4]2− are ____________ respectively.
Concept: undefined >> undefined
When lanthanoids (Ln) are heated to about 2800 K with carbon, the carbides with general formula ____________ are obtained.
Concept: undefined >> undefined
Optical isomerism is exhibited by ____________.
Concept: undefined >> undefined
What is the product of the following reaction?
\[\ce{H3C - C ≡ CH + H - OH ->[{40%}H2SO4][{1%}HgSO4] ?}\]
Concept: undefined >> undefined
For the reaction:
\[\ce{2Cl_{(g)} -> Cl2_{(g)}}\]
Concept: undefined >> undefined
____________ is used for treatment of lead poisoning.
Concept: undefined >> undefined
Which one of the following has ΔS0 greater than zero?
Concept: undefined >> undefined
Which of the following statement is CORRECT?
Concept: undefined >> undefined
Which of the following has a greater number of electrons than neutrons?
(Mass number of Mg, C, O and Na is 24, 12, 16 and 23 respectively).
Concept: undefined >> undefined
What is the general molecular formula of the product obtained on reacting lanthanoids (Ln) with nitrogen?
Concept: undefined >> undefined
The real gas obeys ideal gas laws only at ____________.
Concept: undefined >> undefined
The C – C sigma bond in C2H2 is formed by ____________ overlap.
Concept: undefined >> undefined
The most suitable reagent(s) required to prepare 1-iodobutane from but-1-ene is/are ____________.
Concept: undefined >> undefined
