Question

4.Nonmetals like …… and ……. have lustrous.

• A. bromine, iodine
• B. iodine ,carbon
• C. carbon ,graphite
• D. iodine ,graphite

Answer 1

The correct option is D

iodine ,graphite

The explanation of the correct option

Option D,Iodine,Graphite

• Iodine is nonmetal instead of dull, it is lustrous in nature.
• Graphite is an allotrope of carbon which is a nonmetal but lustrous and also a good conductor of electricity.

The explanation for incorrect options :

Option A Bromine, Iodine

• Iodine is a lustrous nonmetal but Bromine is a nonmetal that is liquid at room temperature.

Option B: Iodine, Carbon

• Iodine is lustrous but carbon is a non lustrous nonmetal.

Option C, Carbon Graphite

• Carbon is lustrous only in two forms diamond and graphite in nature.
• Other forms like coke ,Coal are dull in nature.
• Graphite is an allotrope of carbon, It is lustrous black in color.

Thus option D, Iodine,and Graphite is the correct option.