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Q11
Give reasons :
(i) Acetylation of aniline reduces its activation effect.
(ii) CH₃NH₂ is more basic than C₆H₅NH₂.
(iii) Although –NH₂ is o/p directing group, yet aniline on nitration gives a significant amount of m-nitroaniline.

Free Response Question Hard View solution

Q12
Give reasons:
(i) Thermal stability decreases from H₂O to H₂Te.
(ii) Fluoride ion has higher hydration enthalpy than chloride ion.
(iii) Nitrogen does not form pentahalide.

Free Response Question Medium View solution

Q13
Define the following :
(i) Anionic detergents
(ii) Limited spectrum antibiotics
(iii) Tranquilizers

Free Response Question Easy View solution

Q14
Write the structures of the monomers used for getting the following polymers :
(i) Nylon-6
(ii) Melamine – formaldehyde polymer
(iii) Teflon

Free Response Question Medium View solution

Q15
Write structures of compounds A, B and C in each of the following reactions :

<img alt="" src="https://imagedelivery.net/HpP6TwyM91IVKvXTR1TJrw/6adec73a-ccc2-45e1-6ec6-13b9f03bd600/public" style="height:112px; width:500px" />
or
Do the following conversions in not more than two steps :
(i) Benzoic acid to benzaldehyde
(ii) Ethyl benzene to Benzoic acid
(iii) Prapanone to Propene

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Q16
(a) Write the principle of method used for the refining of germanium.
(b) Out of PbS and PbCO₃ (ores of lead), which one is concentrated by froth floatation process preferably?
(c) What is the significance of leaching in the extraction of aluminium ?

Free Response Question Medium View solution

Q17
Following compounds are given to you:
2-Bromopentane, 2-Bromo-2-methylbutane, 1-Bromopentane
(i) Write the compound which is most reactive towards SN2 reaction.
(ii) Write the compound which is optically active.
(iii) Write the compound which is most reactive towards β-elimination reaction.

Free Response Question Medium View solution

Q18
Following data are obtained for the reaction : 
N₂O₅ 2NO₂+ O₂

<img alt="" src="https://imagedelivery.net/HpP6TwyM91IVKvXTR1TJrw/24563e37-f218-4bb6-fe5b-7f01224b3300/public" />

(a) Show that it follows first order reaction. 
(b) Calculate the half-life. 
(Given log 2 = 0.3010 log 4 = 0.6021)

Free Response Question Hard View solution

Q19
Write one difference between each of the following :
(i) Multimolecular colloid and Macromolecular colloid
(ii) Sol and Gel
(iii) O/W emulsion and W/O emulsion

Free Response Question Easy View solution

Q20
(i) What type of isomerism is shown by the complex [Co(en)₃]Cl₃?
(ii) Write the hybridisation and magnetic character of [Co(C₂O₄)₃]³⁻ (At. no. of Co = 27)
(iii) Write IUP AC name of the following Complex [Cr(NH₃)₃Cl₃].

Free Response Question Hard View solution

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2017

Q11
Give reasons :
(i) Acetylation of aniline reduces its activation effect.
(ii) CH₃NH₂ is more basic than C₆H₅NH₂.
(iii) Although –NH₂ is o/p directing group, yet aniline on nitration gives a significant amount of m-nitroaniline.

Solution

Q12
Give reasons:
(i) Thermal stability decreases from H₂O to H₂Te.
(ii) Fluoride ion has higher hydration enthalpy than chloride ion.
(iii) Nitrogen does not form pentahalide.

Solution

Q13
Define the following :
(i) Anionic detergents
(ii) Limited spectrum antibiotics
(iii) Tranquilizers

Solution

Q14
Write the structures of the monomers used for getting the following polymers :
(i) Nylon-6
(ii) Melamine – formaldehyde polymer
(iii) Teflon

Solution

Solution

Q16
(a) Write the principle of method used for the refining of germanium.
(b) Out of PbS and PbCO₃ (ores of lead), which one is concentrated by froth floatation process preferably?
(c) What is the significance of leaching in the extraction of aluminium ?

Solution

Q17
Following compounds are given to you:
2-Bromopentane, 2-Bromo-2-methylbutane, 1-Bromopentane
(i) Write the compound which is most reactive towards SN2 reaction.
(ii) Write the compound which is optically active.
(iii) Write the compound which is most reactive towards β-elimination reaction.

Solution

Solution

Q19
Write one difference between each of the following :
(i) Multimolecular colloid and Macromolecular colloid
(ii) Sol and Gel
(iii) O/W emulsion and W/O emulsion

Solution

Q20
(i) What type of isomerism is shown by the complex [Co(en)₃]Cl₃?
(ii) Write the hybridisation and magnetic character of [Co(C₂O₄)₃]³⁻ (At. no. of Co = 27)
(iii) Write IUP AC name of the following Complex [Cr(NH₃)₃Cl₃].

Solution

Subjects

2017

Q11 Give reasons : (i) Acetylation of aniline reduces its activation effect. (ii) CH₃NH₂ is more basic than C₆H₅NH₂. (iii) Although –NH₂ is o/p directing group, yet aniline on nitration gives a significant amount of m-nitroaniline.

Solution

Q12 Give reasons: (i) Thermal stability decreases from H₂O to H₂Te. (ii) Fluoride ion has higher hydration enthalpy than chloride ion. (iii) Nitrogen does not form pentahalide.

Solution

Q13 Define the following : (i) Anionic detergents (ii) Limited spectrum antibiotics (iii) Tranquilizers

Solution

Q14 Write the structures of the monomers used for getting the following polymers : (i) Nylon-6 (ii) Melamine – formaldehyde polymer (iii) Teflon

Solution

Q15

Solution

Q16 (a) Write the principle of method used for the refining of germanium. (b) Out of PbS and PbCO₃ (ores of lead), which one is concentrated by froth floatation process preferably? (c) What is the significance of leaching in the extraction of aluminium ?

Solution

Q17 Following compounds are given to you: 2-Bromopentane, 2-Bromo-2-methylbutane, 1-Bromopentane (i) Write the compound which is most reactive towards SN2 reaction. (ii) Write the compound which is optically active. (iii) Write the compound which is most reactive towards β-elimination reaction.

Solution

Q18

Solution

Q19 Write one difference between each of the following : (i) Multimolecular colloid and Macromolecular colloid (ii) Sol and Gel (iii) O/W emulsion and W/O emulsion

Solution

Q20 (i) What type of isomerism is shown by the complex [Co(en)₃]Cl₃? (ii) Write the hybridisation and magnetic character of [Co(C₂O₄)₃]³⁻ (At. no. of Co = 27) (iii) Write IUP AC name of the following Complex [Cr(NH₃)₃Cl₃].

Solution

Subjects

Q11
Give reasons :
(i) Acetylation of aniline reduces its activation effect.
(ii) CH₃NH₂ is more basic than C₆H₅NH₂.
(iii) Although –NH₂ is o/p directing group, yet aniline on nitration gives a significant amount of m-nitroaniline.

Q12
Give reasons:
(i) Thermal stability decreases from H₂O to H₂Te.
(ii) Fluoride ion has higher hydration enthalpy than chloride ion.
(iii) Nitrogen does not form pentahalide.

Q13
Define the following :
(i) Anionic detergents
(ii) Limited spectrum antibiotics
(iii) Tranquilizers

Q14
Write the structures of the monomers used for getting the following polymers :
(i) Nylon-6
(ii) Melamine – formaldehyde polymer
(iii) Teflon

Q16
(a) Write the principle of method used for the refining of germanium.
(b) Out of PbS and PbCO₃ (ores of lead), which one is concentrated by froth floatation process preferably?
(c) What is the significance of leaching in the extraction of aluminium ?

Q17
Following compounds are given to you:
2-Bromopentane, 2-Bromo-2-methylbutane, 1-Bromopentane
(i) Write the compound which is most reactive towards SN2 reaction.
(ii) Write the compound which is optically active.
(iii) Write the compound which is most reactive towards β-elimination reaction.

Q19
Write one difference between each of the following :
(i) Multimolecular colloid and Macromolecular colloid
(ii) Sol and Gel
(iii) O/W emulsion and W/O emulsion

Q20
(i) What type of isomerism is shown by the complex [Co(en)₃]Cl₃?
(ii) Write the hybridisation and magnetic character of [Co(C₂O₄)₃]³⁻ (At. no. of Co = 27)
(iii) Write IUP AC name of the following Complex [Cr(NH₃)₃Cl₃].