Optical isomerism and chirality

Consider all possible isomeric ketones, including stereoisomers, of MW = 100. All these isomers are independently reacted with $\ce{NaBH4}$ (NOTE: stereoisomers are also reacted separately). The total number of ketones that give a racemic product(s) is/are

Which one of the following acids does not exhibit optical isomerism ?

A tetrapeptide has -COOH group on alanine. This produces glycine (Gly), valine (Val), phenyl alanine (Phe) and alanine (Ala), on complete hydrolysis. For this tetrapeptide, the number of possible sequences (primary structures) with $\ce{-NH2}$ group attached to a chiral center is

Compounds formed from P and Q are, respectively

The number of optically active products obtained from the complete ozonolysis of the given compound is

When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form is
$$\ce{OHC-CH2-CH(OH)-CH(OH)-CH(OH)-CH2OH}$$

With reference to the scheme given, which of the given statement(s) about T, U, V and W is (are) correct?

Which of the given statement(s) about N, O, P and Q with respect to M is (are) correct?

The maximum number of isomers (including stereoisomers) that are possible on mono-chlorination of the following compound, is

The correct statement(s) about the compound $\ce{H3C(HO)HC-CH=CH-CH(OH)CH3}$ (X) is(are)

The total number of cyclic structural as well as stereo isomers possible for a compound with the molecular formula $\ce{C5H10}$ is

The correct statement(s) about the compound given below is (are)

The number of stereoisomers obtained by bromination of trans-2-butene is

STATEMENT-1: Molecules that are not superimposable on their mirror images are chiral.

because

STATEMENT-2: All chiral molecules have chiral centres.