CO₂ is a linear molecule (O=C=O). Although the C=O bonds are polar, the molecule is symmetric, and the dipole moments of the two bonds are equal and opposite, canceling each other out. Thus, the net dipole moment is zero, making it non-polar. HCl, H₂O, and NH₃ are polar.
Explanation:
Bakelite is a thermosetting plastic, heat resistant and electrical insulator. Polythene and PVC are thermoplastics; they soften on heating. Teflon is non-stick.
Explanation:
Graphite mixed with clay forms pencil 'lead'. Its layered structure marks paper. Diamond is used in cutting, fullerene in nanotechnology, charcoal in filters and fuel.
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