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Q1
Why are medicines more effective in colloidal state?
What is difference between an emulsion and a gel?

Free Response Question Easy View solution

Q2
Arrange the following in increasing order of base strength in the gas phase:
(CH₂H₅)₃N, C₂H₅NH₂, (C₂H₃)₂NH

Free Response Question Easy View solution

Q3
Why conductivity of silicon increases on doping with phosphorus?

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Q4
Write IUPAC name of the given compound:
img alt=src= style="height:184px; width:100px

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Q5
Write structures of compounds A and B in each of the following reactions :
img alt=src=" style="height:206px; width:350px" /></p>

Free Response Question Medium View solution

Q6
For a reaction

2H₂O₂ —Alkaline medium/ I⁻→ 2H₂O+ O₂
the proposed mechanism is as given below:
1. H₂O₂ + I⁻ → H₂O + IO⁻ (slow)
2. H₂O₂ + IO⁻ → H₂O + I⁻ + O₂ (fast)
(i) Write the rate law for the reaction.
(ii) Write the overall order of a reaction.
(iii) Out of steps (1) and (2), which one is rate-determining step?

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Q7
Write two differences between an ideal solution and a non-ideal solution.

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Q8
When MnO₂ is fused with KOH in the presence of KNO₃ as an oxidizing agent, it gives a dark green compound (A). Compound (A) disproportionates in acidic solution to give purple compound (B). An alkaline solution of compound (B) oxidises KI to compound (C) whereas an acidified solution of compound (B) oxidises KI to (D). Identify (A), (B), (C), and (D).

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Q9
Write IUPAC name of the complex [Cr(NH₃)₄Cl₂]⁺. Draw structures of geometrical isomers for this complex.
OR
Using IUPAC norms write the formulae for the following :
(i) Pentaamminenitrito-O-cobalt(III) chloride
(ii) Potassium tetracyanidonickelate(II)

Free Response Question Medium View solution

Q10
Out of [CoFe₆]³⁻ and [Co(C₂O₄)]³⁻, which one complex is:
(i) diamagnetic
(ii) more stable
(iii) outer orbital complex and
(iv) low spin complex ? (Atomic no. of (Co = 27)

Free Response Question Medium View solution

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2019

Q1
Why are medicines more effective in colloidal state?
What is difference between an emulsion and a gel?

Solution

Q2
Arrange the following in increasing order of base strength in the gas phase:
(CH₂H₅)₃N, C₂H₅NH₂, (C₂H₃)₂NH

Solution

Q3
Why conductivity of silicon increases on doping with phosphorus?

Solution

Q4
Write IUPAC name of the given compound:
img alt=src= style="height:184px; width:100px

Solution

Q5
Write structures of compounds A and B in each of the following reactions :
img alt=src=" style="height:206px; width:350px" /></p>

Solution

Solution

Q7
Write two differences between an ideal solution and a non-ideal solution.

Solution

Solution

Q9
Write IUPAC name of the complex [Cr(NH₃)₄Cl₂]⁺. Draw structures of geometrical isomers for this complex.
OR
Using IUPAC norms write the formulae for the following :
(i) Pentaamminenitrito-O-cobalt(III) chloride
(ii) Potassium tetracyanidonickelate(II)

Solution

Q10
Out of [CoFe₆]³⁻ and [Co(C₂O₄)]³⁻, which one complex is:
(i) diamagnetic
(ii) more stable
(iii) outer orbital complex and
(iv) low spin complex ? (Atomic no. of (Co = 27)

Solution

Subjects

2019

Q1 Why are medicines more effective in colloidal state?What is difference between an emulsion and a gel?

Solution

Q2 Arrange the following in increasing order of base strength in the gas phase: (CH₂H₅)₃N, C₂H₅NH₂, (C₂H₃)₂NH

Solution

Q3 Why conductivity of silicon increases on doping with phosphorus?

Solution

Q4 Write IUPAC name of the given compound:img alt=src= style="height:184px; width:100px

Solution

Q5 Write structures of compounds A and B in each of the following reactions :img alt=src=" style="height:206px; width:350px" /></p>

Solution

Solution

Q7 Write two differences between an ideal solution and a non-ideal solution.

Solution

Solution

Q9 Write IUPAC name of the complex [Cr(NH₃)₄Cl₂]⁺. Draw structures of geometrical isomers for this complex. OR Using IUPAC norms write the formulae for the following : (i) Pentaamminenitrito-O-cobalt(III) chloride (ii) Potassium tetracyanidonickelate(II)

Solution

Q10 Out of [CoFe₆]³⁻ and [Co(C₂O₄)]³⁻, which one complex is: (i) diamagnetic (ii) more stable (iii) outer orbital complex and (iv) low spin complex ? (Atomic no. of (Co = 27)

Solution

Subjects

Q1
Why are medicines more effective in colloidal state?
What is difference between an emulsion and a gel?

Q2
Arrange the following in increasing order of base strength in the gas phase:
(CH₂H₅)₃N, C₂H₅NH₂, (C₂H₃)₂NH

Q3
Why conductivity of silicon increases on doping with phosphorus?

Q4
Write IUPAC name of the given compound:
img alt=src= style="height:184px; width:100px

Q5
Write structures of compounds A and B in each of the following reactions :
img alt=src=" style="height:206px; width:350px" /></p>

Q7
Write two differences between an ideal solution and a non-ideal solution.

Q9
Write IUPAC name of the complex [Cr(NH₃)₄Cl₂]⁺. Draw structures of geometrical isomers for this complex.
OR
Using IUPAC norms write the formulae for the following :
(i) Pentaamminenitrito-O-cobalt(III) chloride
(ii) Potassium tetracyanidonickelate(II)

Q10
Out of [CoFe₆]³⁻ and [Co(C₂O₄)]³⁻, which one complex is:
(i) diamagnetic
(ii) more stable
(iii) outer orbital complex and
(iv) low spin complex ? (Atomic no. of (Co = 27)