List of top Chemistry Questions asked in MET

Calculate the electronegativity of chlorine from bond energy of Cl-F bond (61 kcal mol\(^{-1}\)), F-F (38 kcal mol\(^{-1}\)) and Cl-Cl bond (58 kcal mol\(^{-1}\)) and electronegativity of fluorine 4.0 eV

A sample of ammonium phosphate (NH\(_4\))\(_3\)PO\(_4\) contains 3.18 moles of H-atom. The number of moles of O-atom in the sample is

In the following compound keto group is at position

In the following reaction sequence:

I. Formation of A has proceeded with racemisation.
II. Formation of B has proceeded with inversion.
Select the correct statement.

In this reaction, we get types of substituted alcohols (stereoisomers not considered)

Electrophile NO\(_2^+\) attacks the following compounds. In which cases, NO\(_2\) will be at meta position?

Screening effect is not observed in

The type of hybridisation of P atom in PCl\(_5\), PCl\(_4^+\) and PCl\(_6^-\) is (respectively)

Which has a maximum repulsive interaction?

Electronic configuration of Gd (64) is written as

Which one of the following isomers of PBrCl\(_3\) have no dipole moment?

1 g of fuming H\(_2\)SO\(_4\) (oleum: mixture of H\(_2\)SO\(_4\) and SO\(_3\) having formula H\(_2\)S\(_2\)O\(_7\)) is diluted with H\(_2\)O. This solution is completely neutralised by 26.7 mL of 0.8 N NaOH. Find the percentage of free SO\(_3\) in the oleum.

Calculate second electron affinity of oxygen for the process: O\(^-\)(g) + e\(^-\)(g) \(\rightarrow\) O\(^{2-}\)(g) using the following data:
(i) Heat of sublimation of Mg(s) = +147.7 kJ mol\(^{-1}\)
(ii) Ionisation energy of Mg(g) to form Mg\(^{2+}\)(g) = +2189.0 kJ mol\(^{-1}\)
(iii) Bond dissociation energy for O\(_2\) = +498.4 kJ mol\(^{-1}\)
(iv) First electron affinity of O(g) = -141.0 kJ mol\(^{-1}\)
(v) Heat of formation of MgO = -601.7 kJ mol\(^{-1}\)
(vi) Lattice energy of MgO = -3791.0 kJ mol\(^{-1}\)

KO\(_2\) is used in life supports in space crafts, submarines and emergency breathing apparatus since it

\(^{14}\)N + \(^{1}_{0}\)n \(\rightarrow\) \(^{14}_{6}\)C + \(^{1}_{1}\)H is written as

Which has maximum ionisation potential?

Photographic paper is developed with alkaline hydroquinone. Select correct statement.

ClO\(_2\) is an/a

The final step for the extraction of copper from copper pyrites in Bessemer converter involves the reaction.

If CO\(_2\)(g) under pressure is passed into Na\(_2\)CrO\(_4\) (aq), yellow colour solution changes to

Which one of the following statements about NO is wrong?

Select incorrect statements.
(A) Ionisation energies of 5d-elements are greater than those of 3d and 4d elements.
(B) Cu(I) is diamagnetic while Cu(II) is paramagnetic.
(C) [Ti(H\(_2\)O)\(_6\)]\(^{3+}\) is colored while [Sc(H\(_2\)O)\(_6\)]\(^+\) is colourless.
(D) Transition elements cannot form complexes.

Based on the following reaction identify alkene A

What are the four quantum numbers of 19th electron in Sc (\(Z = 21\))?

(A) + tap water \(\rightarrow\) white turbidity soluble in aq NH\(_3\)
(A) \(\xrightarrow{\Delta}\) residue (B) + NO\(_2\) + O\(_2\)
Aqueous (A) gives brown ring on adding FeSO\(_4\) and conc. H\(_2\)SO\(_4\). Identify (A).