Question
Explain the structure of different disaccharides.

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Match the compounds/elements given in Column I with uses given in Column II.
 
Column I (Compound/element)
 
Column II (Use)
(i)
Lanthanoid oxide
(a)
Production of iron alloy
(ii)
Lanthanoid
(b)
Television screen
(iii)
Misch metal
(c)
Petroleum cracking
(iv)
Magnesium based alloy is constituent of
(d)
Lanthanoid metal + iron
(v)
Mixed oxides of lanthanoids are employed
(e)
Bullets
 
 
(f)
In X-ray screen
Synthetic detergents have advantage over usual soaps as far as cleansing power is concerned. But use of synthetic detergents over a long time creates environmental pollution. How can the pollution caused by synthetic detergents be minimised? Classify the detergents according to their chemical nature.
Write the IUPAC names of the following coordination compounds:
i. $\left[ Co \left( NH _3\right) 6\right] Cl _3$
ii. $\left[ Co \left( NH _3\right)_5 Cl \right] Cl _2$
iii. $K_3\left[ Fe ( CN )_6\right]$
iv. $K_3\left[ Fe \left( C _2 O _4\right)_3\right]$
v. $K_2\left[P_{d C l}^4\right]$
vi. $\left[ Pt \left( NH _3\right)_2 Cl \left( NH _2 CH _3\right)\right] Cl$
Answer the following questions:
Assign reasons for the following:
  1. In the series Sc $(Z = 21)$ to Zn $(Z = 30),$ the enthalpy of atomisation of Zn is the lowest.
  2. Zr and Hf have almost identical radii.
  3. Transition metals show variable oxidation states.
  4. The $E^\circ M^{2+}/M$ value for copper is positive $(+0.34 V).$
Using Valence bond theory, explain the following in relation to the paramagnetic complex $[Mn(CN)_6]^{3-}$
$a.$ type of hybridisation
$b.$ magnetic moment value
$c.$ type of complex $-$ inner, outer orbital complex
Match the items of Column I with items of Column II and assign the correct code:
 
Column I
 
Column II
(A)
Cyanide process
(1)
Ultrapure Ge
(B)
Froth Floatation process
(2)
Dressing of ZnS
(C)
Electolytic reduction
(3)
Extraction of Al
(D)
Zone refinning
(4)
Extraction of Au
 
 
(5)
Purification of Ni
  1. A (4) B (2) C (3) D (1)
  2. A (2) B (3) C (1) D (5)
  3. A (1) B (2) C (3) D (4)
  4. A (3) B (4) C (5) D (1)
How will you distinguish between the following pairs of terms:
  1. Hexagonal close-packing and cubic close-packing?
  2. Crystal lattice and unit cell?
  3. Tetrahedral void and octahedral void?
Describe the mechanism of replication of DNA.
Attempt any five of the following$:$
$(a)$ Deficiency of which vitamin causes night$-$blindness.
$(b)$ Give two examples of reducing sugars.
$(c$) Define the following terms$:$
$i.$ Glycosidic linkage
$ii.$ Native protein
$(d)$ Write function of carbohydrates in plants.
$(e)$ Differentiate between$:$
$i.$ Peptide linkage and Glycosidic linkage
$ii.$ Nucleoside and Nucleotide
$(f)$ What type of linkage holds together the monomers of $ \text{DNA}?$
$(g$) Write the product obtained when $D-$glucose reacts with $H_2N-OH.$
Derive formula for degree of dissociation and degree of condensation of the solute in the solvent.