Define racemic mixtures.

What is the total number of possible isomers of the following formula?

${\mathrm{C}}_2{\mathrm{H}}_3{\mathrm{Br}}_2\mathrm{Cl}$

In the following structures 

Find the correct statements.

The lowest molecular weight alkene which is optically active is/are

(a) $3$-methyl pentene

(b) $2$-methyl pent-$2$-ene

(c) $4$-methyl pentene

(d) $3$-methyl butene

(e) $3$-methyl hex-$2$-ene

What is the maximum number of geometrical isomers possible for the following compound?

What is the solution of the product (P) formed after the reaction of $-\mathrm{COOH}$ with $\mathrm{OH}$ group to form ester?

How many stereoisomers of $1, 2-$dichlorocyclohexane are optically active?

Which among the following show geometrical isomerism?

Consider the following two possible geometry of a complex around central metal $\mathrm{M}$ and select correct statement(s) about complex.

Which of the following cycloalkanes will show cis-trans isomerism?

(a)   

(b)    

(c)     

(d)