Biomolecules are formed by certain specific linkages between simple monomeric units. Write the names of linkages and monomeric units in the following class of biomolecules. Starch.

The linkage between the two monosaccharide units in lactose is

In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. Assertion: The total number of atoms present in a simple cubic unit cell is one. Reason: Simple cubic unit cell has atoms in its corners each of which is shared between eight adjacent unit cells.

Which monosaccharide units are present in starch, cellulose and glucose and which linkages link these units?

Reaction between NO_2 and CO to give CO_2 and NO takes place by the following mechanism: Write the rate expression and order of the reaction. What is the unit of rate constant ?

Reaction between NO_2 and F_2 to give NO_2F takes place by the following mechanism: Write the rate expression and order of the reaction. What is the unit of rate constant ?

Write the names and symbols of two most reactive metals belongiong to group I of the periodic table. Explain by drawing electronic structure how either one of the two metals reacts with halogen. With which name is the bond formed between these elements known and what is the class of the compuond so formed known? state any four physical properties of such compounds.