DATE OF SUBMISSION 23-07-2018

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DATE OF SUBMISSION 12-11-2017

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DATE OF SUBMISSION 06-11-2017

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PERIODIC CLASSIFICATION OF ELEMENTS                        

1. State Mendeleevs periodic law .

2. What is law of octaves ?

3. What are the merits and demerits of Mendeleevs periodic table?

4. Define  a period and group in the periodic table.

5. Account for the following.

(i) Atomic radius increases from top to bottom in a group and decreases from left to right in a    period.

(ii) Ionization enthalpy decreases from top to bottom in a group and increases from left to right in a period.

(iii) First ionization enthalpy of Be is slightly higher than that of B.

(iv) First ionization enthalpy of N is higher than that of O.

(v) Electron gain enthalpy of F is less negative than that of Cl

(vi) The first member of each group differs from the properties of remaining elements of the same group.

(vii) Second ionization enthalpy is always greater than first IE.

(viii) d- block elements are called transition elements.

6. What is diagonal relationship?

7. How does metallic and nonmetallic character vary in the periodic table along a period and   in a group?

8. Write the general electronic configurations s,p,d and f block elements.

9. Write a short note on valency of elements.

10. What is the difference between electronegativity and electron gain enthalpy?

HYDROCARBONS

DATE OF SUBMISSION: 15.02.2016

1.       How will you effect the following  conversions?

i.                     Ethene to ethane

ii.                   Methane to ethane

iii.                   Propanoic acid to ethane

iv.                 Propyl chloride to propene

v.                   Ethyl alcohol to ethane

vi.                 Propene to 2-Bromopropane

vii.                Propene to 1-Bromopropane

viii.              2-Bromopropane to propene

ix.                  1-Bromopropane to 2-Bromopropane

x.                   2-Bromopropane to 1-Bromopropane

xi.                 Propene to propan-2-ol

xii.                1,2-Dibromoethane to ethane

2.       Explain with example.

i.                     Conformations in alkanes

ii.                   Β – elimination

iii.                  Markovnikovs rule

iv.                 Anti markovnikovs rule or kharash effect

v.                   Mechanism of Markovnikovs addition

3.       Write IUPAC names of the following.

i.                     CH₂ = CH CH(CH₃)CH₃

ii.                   CH₃ CH₂ CH₂O CH₂CH₃