Answer

  1. CH3CH2CH3.
  2. C6H5COONa+CHI3.
  3. CH4.

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Shanti, a domestic helper of Mrs. Anuradha, fainted while mopping the floor. Mrs. Anuradha immediately took her to the nearby hospital where she was diagnosed to be severely ‘anaemic’, The doctor prescribed an iron rich diet and multivitamins supplement to her. Mrs. Anuradha supported her financially to get the medicines. After a month, Shanti was diagnosed to be normal.
After reading the above passage, answer the following questions:
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  3. Give an example of a water soluble vitamin.
Define isomerism and tell its types.
Write the chemical equation for the following conversion (not more than 2 steps):
Ethyl benzene to benzene.
Calculate emf of the following cell at 25°C:
Fe|Fe2+(0.001M)||H+(0.01M)|H2(g) (1bar)|Pt(s)
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How would you account for the following:
  1. Among lanthanoids, Ln (III) compounds are predominant. However, occasionally in solutions or in solid compounds, +2 and +4 ions are also obtained.
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Consider a certain reaction A → Products with k = 2.0 × 10–2s–1. Calculate the concentration of A remaining after 100 s if the initial concentration of A is 1.0 mol L–1.
The rate constants of a reaction at 500K and 700K are 0.02 S-1 and 0.07S-1 respectively. Calculate the values of E_{s} and A.
$\left[ R =8.314 JK ^{-1} mol^{-1}\right]$
Two elements A and B form compounds having formula AB2 and AB4. When dissolved in 20 g of benzene (C6H6), 1 g of AB2 lowers the freezing point by 2.3 K whereas 1.0 g of AB4 lowers it by 1.3 K. The molar depression constant for benzene is 5.1 K kg mol–1. Calculate atomic masses of A and B.
Match the properties given in Column I with the metals given in Column II.

 
Column I (Property)
 
Column II (Metal)
(i)
An element which can show +8 oxidation state
(a)
Mn
(ii)
3d block element that can show upto +7 oxidation state
(b)
Cr
(iii)
3d block element with highest melting point
(c)
Os
   
(d)
Fe