Which of the following is a good conductor of heat and electricity?

Which of the following products is formed on boiling tin with an alkali solution?

$Si$ reacts with $CH_3Cl$ at $573 \ K$ in the presence of $Cu$ powder to form methyl substituted chlorosilanes. Among the given methyl substituted chlorosilanes, whose yield is minimum?

The correct order of catenation is

Which of the following substances is known as lead sugar?

What are allotropes? Sketch the structure of two allotropes of carbon namely diamond and graphite. What is the impact of structure on physical properties of these two allotropes?