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During nuclear explosion, one of the products is 90Sr with half-life of 28.1 years. If 1μg of 90Sr was absorbed in the bones of a newly born baby instead of calcium, how much of it will remain after 10 years and 60 years if it is not lost metabolically.
  1. Calculate $\Delta$rGfor the reaction:

Mg (s)+Cu2+ (aq) $\rightarrow$ Mg2+ (aq) + Cu (s)
Given: Eocell = + 2.71 V, 1 F = 96500 C mol–1

  1. Name the type of cell which was used in Apollo space programme for providing electrical power.
How would you account for the following?
  1. Transition metals exhibit variable oxidation states.
  2. Zr(z=40) and Hf (Z=72) have almost identical redii.
  3. Transition metals and their compounds act as catalyst.
Write the reactions involved when D-glucose is treated with the following reagents:
  1. Br2 water
  2. H2N-OH
  3. (CH3CO)2O
Write about oxidation states of transition series ?
Match the items of column I with items of column II.
 
Column I
 
Column II
(i)
Methanol
(a)
Conversion of phenol to o-hydroxysalicylic acid
(ii)
Kolbe’s reaction
(b)
Ethyl alcohol
(iii)
Williamson’s synthesis
(c)
Conversion of phenol to salicylaldehyde
(iv)
Conversion of 2° alcohol to ketone
(d)
Wood spirit
(v)
Reimer-Tiemann reaction
(e)
Heated copper at 573K
(vi)
Fermentation
(f)
Reaction of alkyl halide with sodium alkoxide
State the reaction equation to prepared benzoic acid from the following compounds.
(1) Ethyl benzene
(ii) Benzoic anhydride
(iii) Benzamide
Write a mote on molar conductivity $\left(\wedge_{\text {m }}\right)$ of solution and write down it's formula.
If the price of electricity require to obtain 1 gram $M g$ from the solution of $M g ^{ 2 + }$ ion is Rs. $5 . 0 0$, then what will the price of electricity required to obtain 10 gram of Al from $Al ^{3+}$ ? (Atomic mass of $Al =$ 27 and $M g =24$ )
Match the items of column I with items of column II.
 
Column I
 
Column II
(i)
Antifreeze used in car engine
(a)
Neutral ferric chloride
(ii)
Solvent used in perfumes
(b)
Glycerol
(iii)
Starting material for picric acid
(c)
Methanol
(iv)
Wood spirit
(d)
Phenol
(v)
Reagent used for detection of phenolic group
(e)
Ethleneglycol
(vi)
By product of soap industry used in cosmetics
(f)
Ethanol.