Embibe Experts Solutions for Chapter: Solved Science Paper-2, Exercise 1: Exercise

Balance the following chemical equations and identify the type of chemical reaction.
${\mathrm{TiCl}}_4\left(\mathrm{l}\right)+\mathrm{Mg}\left(\mathrm{s}\right)\to \mathrm{Ti}\left(\mathrm{s}\right)+{\mathrm{MgCl}}_2\left(\mathrm{s}\right)$

The general formula of three compounds $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ is ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}}$. $\mathrm{B}$ has the highest boiling point and $\mathrm{C}$ has the lowest boiling point.

Name the homologous series to which $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ belong.

Which type of spherical mirror has real focus and why?

Why do stars twinkle ? Explain.

Which type of image is formed in a camera lens? In human eye, where is the image formed?

a. Propene is unsaturated. What does that mean?

b. Write an equation for its reaction with bromine.

Using dots $\left(\circ \right)$ and crosses $\left(\times \right)$ to represent valence electrons, show the formation of covalent bonds in Carbon tetrachloride.

Why is chemical communication better than electrical impulses as a means of communication between cells in a multi-cellular organism?