The decreasing order of reactivity towards dehydrohalogenation (E₁) reaction of the following compounds is :

The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are :

Which of the following statement is not true for glucose?

The rate of a certain biochemical reaction at physiological temperature (T) occurs 10⁶ times faster with enzyme than without. The change in the activation energy upon adding enzyme is :