\(\mathrm{R}-\mathrm{CN} \xrightarrow[\text { (ii) } \mathrm{H}_{2} \mathrm{O}]{\text { (i) DIBAL-H }} \mathrm{R}-\mathrm{Y}\) Consider the above reaction and identify \("Y"\)

Match the LIST-I with LIST-II

LIST-I (Molecules/ion)	LIST-II (Hybridisation of central atom)
A. \(PF _5\)	I. \(dsp ^2\)
B. \(SF _6\)	II. \(sp ^3 d\)
C. \(Ni ( CO )_4\)	III. \(sp ^3 d^2\)
D. \(\left[ PtCl _4\right]^{2-}\)	IV. \(sp ^3\)

Choose the correct answer from the options given below

\(A, B\) and \(C\) are three biomolecules. The results of the tests performed on them are given below \(\begin{array}{|c|c|c|c|}\hline {} &\text { Molisch's Test} & {\text { Barfoed Test}} & {\text { Biuret Test}} \\ \hline \text { A} & { Positive } & {\text { Negative }} & {\text { Negative }} \\ \hline \text { B } & {\text { Positive }} & {\text { Positive }} & {\text { Negative }} \\ \hline \text { C } & {\text { Negative }} & {\text { Negative }} & {\text { Positive }} \\ \hline\end{array}\) \(A, B\) and \(C\) are respectively

Given below are two statements :
Statement I: The condensation reaction between \(CH_3-CH=O\) and \(H_2N-NH-C(=O)-NH_2\) under optimum pH will produce \(CH_3-CH=N-N(H)-C(=O)-NH_2\).
Statement II: The molecule, \(Ph-CH(O-H)(O-CH_3)\) will generate \(Ph-CH=O\) in the presence of dilute acid.
In the light of the above statements, choose the correct answer from the options given below :

The total number of species from the following in which one unpaired electron is present is _______.
[\(\mathrm{N}_2, \mathrm{O}_2, \mathrm{C}_2^{-}, \mathrm{O}_2^{-}, \mathrm{O}_2^{2-}, \mathrm{H}_2^{+}, \mathrm{CN}^{-}, \mathrm{He}_2^{+}\)]

Sucrose hydrolyses in acid solution into glucose and fructose following first order rate law with a half-life of \(3.33\, h\) at \(25^{\circ} C\). After \(9 \,h ,\) the fraction of sucrose remaining is \(f\). The value of \(\log _{10}\left(\frac{1}{f}\right)\) is ..... \(\times 10^{-2} .\) (Rounded off to the nearest integer) [Assume : \(\ln 10=2.303, \ln 2=0.693\) ]

The region in the electromagnetic spectrum where the Balmer series lines appear is

For octahedral \(Mn(II)\) and tetrahedral \(Ni(II)\) complexes, consider the following statements : \((I)\) both the complexes can be high spin \((II)\) \(Ni(II)\) complex can very rarely be low spin. \((III)\) with strong field ligands, \(Mn(II)\) complexes can be low spin. \((IV)\) aqueous solution of \(Mn ( II )\) ions is yellow in color.

Evaluate the following statements related to group \(14\) elements for their correctness. \((A)\)Covalent radius decreases down the group from \(\mathrm{C}\) to \(\mathrm{Pb}\) in a regular manner. \((B)\) Electronegativity decreases from \(\mathrm{C}\) to \(\mathrm{Pb}\) down the group gradually. \((C)\) Maximum covalence of \(\mathrm{C}\) is \(4\) whereas other elements can expand their covalence due to presence of \(d\) orbitals. \((D)\) Heavier elements do not form \(\mathrm{p} \pi-p \pi\) bonds. \((E)\) Carbon can exhibit negative oxidation states. Choose the correct answer from the options given below:

Two cells are connected in opposition as shown. Cell \(\mathrm{E}_1\) is of \(8 \mathrm{~V}\) emf and \(2 \ \Omega\) internal resistance; the cell \(E_2\) is of \(2 \mathrm{~V}\) emf and \(4\ \Omega\) internal resistance. The terminal potential difference of cell \(\mathrm{E}_2\) is _______.

Which of the following will have maximum stabilization due to crystal field?

The number of real values \(\lambda\), such that the system of linear equations \(2 x-3 y+5 z=9\)  ;  \(x+3 y-z=-18\)    ; \(3 x-y+\left(\lambda^{2}-1 \lambda \mid\right) z=16\) has no solution, is :-

If a straight line drawn through the point of intersection of the lines \(4x+3y-1=0\) and \(3x+4y-1=0\), meets the co-ordinate axes at the points P and Q, then the locus of the mid point of PQ is: