MCQ
The lanthanide contraction is responsible for the fact that
- A$Zr$ and $Hf$ have same atomic sizes
- B$Zr$ and $Hf$ have same properties
- C$Zr$ and $Hf$ have different atomic sizes
- ✓Both $(a)$ and $(b)$
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$(I)$ Glucose
$(II)$ Fructose
$(III)$ Maltose
$(IV)$ Sucrose
$(V)$ Galactose

Given : $\log 3=0.48$
$A.$ Reaction completes in $1000\,s$.
$B.$ The reaction has a half-life of $500\, s$.
$C.$ The time required for $10\, \%$ completion is 25 times the time required for $90 \,\%$ completion.
$D.$ The degree of dissociation is equal to $\left(1-e^{-k t}\right)$.
$E.$ The rate and the rate constant have the same unit.
Reason : Iodine is a polar compound.