Chemistry:2017:CBSE: [All India]: Set-III
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Q1Marks:1View Answer
Answer:
is an example of benzylic halide
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Q2
What is the effect of adding a catalyst on
(a) Activation energy (Ea), and
(b) Gibbs energy (ΔG) of a reaction?
Marks:1View AnswerAnswer:
(i) A catalyst reduces the activation energy (Ea) by providing alternate path for reaction to proceed.
(ii)There will be no effect of catalyst on Gibbs energy (ΔG) of a reaction.
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Q3
Write the formula of the compound of iodine which is obtained when conc. HNO3 oxidises I2.
Marks:1View AnswerAnswer:
When conc. HNO3 oxidises I2, Iodic acid is obtained. Its formula is HIO3.
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Q4
What type of colloid is formed when a gas is dispersed in a liquid? Give an example.
Marks:1View AnswerAnswer:
Foam is formed when a gas is dispersed in a liquid. E.g., whipped cream, soap lather etc.
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Q5
Write the IUPAC name of the following compound:
Marks:1View AnswerAnswer:
IUPAC name of the compound is
2-Methoxy-2-methylpropane
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Q6
Draw the structures of the following:
(a) XeF4
(b) BrF5
Marks:2View AnswerAnswer:
(a) XeF4 : Square planar
(ii) BrF5, Square pyramidal
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Q7
Write the name of the cell which is generally used in transistors. Write the reactions taking place at the anode and the cathode of this cell.
Marks:2View AnswerAnswer:
Dry cell is generally used in transistors.
The reactions taking place at cathode and anode are:
Anode:
Cathode:
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Q8
(a) Arrange the following compounds in the increasing order of their acid strength:
p-cresol, p-nitrophenol, phenol
(b) Write the mechanism (using curved arrow notation) of the following reaction:
Marks:2View AnswerAnswer:
(a) Increasing order of acidity
(b) Mechanism of the reaction is
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Q9
Write the structures of the products when Butan-2-ol reacts with the following:
a) CrO3
b) SOCl2
Marks:2View AnswerAnswer:
a)
b)
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Q10
Using IUPAC norms write the formulae for the following:
(a) Potassium trioxalatoaluminate(III)
(b) Dichloridobis(ethane-1,2-diamine)cobalt(III)
Marks:2View AnswerAnswer:
(a) K3[Al(C2O4)3]
(b) [CoCl2(en)2]+
