When isopentane is subject to monochlorination. What will be the number of monochlorinated product contain chiral carbon?

When isopentane is subjected to mono chlorination, what will be the number of mono chlorinated products contain chiral carbon

An unknown compound is analyzed to have a molecular mass of 84 and elements has carbon and hydrogen only.When subjected to chlorination in the presence of light, three monochlorinated products are isolated . This compound must be

On monochlorination of 2-methylbutane, the total number of chiral compounds are

On monochlorination of 2-methylbutane, the total number of chiral compound formed is :