Which one of the following reactions will not form acetaldehyde ?

In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of \(CO_2\) is

The element with which of the following outer electron configuration may exhibit the largest number of oxidation states in its compounds 

In which of the following sets, all the given species are isostructural ?

Identify the correct statements.
A. Arginine and Tryptophan are essential amino acids.
B. Histidine does not contain heterocyclic ring in its structure.
C. Proline is a six membered cyclic ring amino acid.
D. Glycine does not have chiral centre.
E. Cysteine has characteristic feature of side chain as \( MeS-CH_{2}-CH_{2}- \)
Choose the correct answer from the options given below:

Given below are two statements: Statement \(I\) : The correct order of first ionization enthalpy values of \(\mathrm{Li}, \mathrm{Na}, \mathrm{F}\) and \(\mathrm{Cl}\) is \(\mathrm{Na}<\mathrm{Li}<\mathrm{Cl}<\mathrm{F}\). Statement \(II\) : The correct order of negative electron gain enthalpy values of \(\mathrm{Li}, \mathrm{Na}, \mathrm{F}\) and \(\mathrm{Cl}\) is \(\mathrm{Na}<\mathrm{Li}<\mathrm{F}<\mathrm{Cl}\) In the light of the above statements, choose the correct answer from the options given below :

Solubility of calcrum phosphate (molecular mass, M) in water is \(\mathrm{W}_{\mathrm{g}}\) per \(100 \mathrm{~mL}\) at \(25^{\circ} \mathrm{C}\). Its solubility product at \(25^{\circ} \mathrm{C}\) will beapproximately.

Which of the following combination of statements is true regarding the interpretation of the atomic orbitals? \((1)\) An electron in an orbital of high angular momentum stays away from the nucleus than an electron in the orbital of lower angular momentum. \((2)\) For a given value of the principal quantum number, the size of the orbit is inversely proportional to the azimuthal quantum number \((3)\) According to wave mechanics, the ground state angular momentum is equal to \(\frac {h}{2\pi }\) \((4)\) The plot of \(\Psi \,\,Vs\,\,r\) for various azimuthal quantum numbers, shows peak shifting towards higher \(r\) value

During estimation of nitrogen by Dumas' method of compound \(\mathrm{X}(0.42 \mathrm{~g})\) :

_____ mL of \(\mathrm{N}_2\) gas will be liberated at STP. (nearest integer)
(Given molar mass in \(\mathrm{g} \mathrm{mol}^{-1}: \mathrm{C}: 12, \mathrm{H}: 1\), \(\mathrm{N}: 14)\)

For elements \(B , C , N , Li , Be , O\) and \(F\) the correct order of first ionization enthalpy is

Which of the following is not a correct statement for primary aliphatic amines?

\(\tan \left(2 \tan ^{-1} \frac{1}{5}+\sec ^{-1} \frac{\sqrt{5}}{2}+2 \tan ^{-1} \frac{1}{8}\right)\) is equal to.

The probability that a randomly chosen one-one function from the set \(\{a, b, c, d\}\) to the set \(\{1,2,3,4,5\}\) satisfies \(f(a)+2 f(b)-f(c)=f(d)\) is