COMEDK 2022

The chemical formula of Lucas reagent is

Which of the following is a false statement?

The major product in the given reaction is

X and Y in the following reactions are

Find the product formed for the given reaction.
\(\mathrm{{C_6}{H_5}CHO + {H_3}C - C{H_2} - CHO\buildrel {Dil.\,NaOH/\Delta } \over \longrightarrow}\)

Minimum number of nodes are present in

\(\mathrm{O^{2-},F^-,Mg^{2+},Al^{3+},O_2,F_2}\). How many of the species given above isoelectronic?

The spectrum of He\(^+\) is similar to

The Paschen series of hydrogen spectrum lies in which region?

What is the function platelets?

The monosaccharides of maltose is

The essential amino acids are
(i) Leucine (ii) Glutamic acid (iii) Asparagine (iv) Valine
correct option is

On treatment of glucose with bromine water the product formed is

Which of the following vitamin is responsible for Beri-Beri disease?

Which of the following molecules does not exhibit dipole moment?
(i) CCl\(_4\) (ii) CO\(_2\) (iii) NH\(_3\) (iv) CHCl\(_3\) (v) H\(_2\)O (vi) CH\(_3\)\(-\)O\(-\)CH\(_3\)

Increasing order of bond order of oxygen and its ions is

The P-O bond order in PO\(_4^{3-}\) is

Which of the following compound does not exists?

For the reaction, H\(_2\)(g) + I\(_2\)(g) \(\rightleftharpoons\) 2HI(g) the position of equilibrium can be shifted to the right by

The equilibrium constant, \(K_C\) for \(3C_2H_2(g) \rightleftharpoons C_6H_6(g)\) is 4 L\(^2\)mol\(^{-2}\). If the equilibrium concentration of benzene is 0.5 mol\(^{-1}\) than what is the value of concentration of ethylene?

A newly prepared radioactive nuclide has a decay constant of 6.93 s\(^{-1}\). What is the half-life of the nuclide?

Which of the following statement is incorrect about activation energy?

For the reaction 2N\(_2\)O\(_5\) \(\to\) 4NO\(_2\) + O\(_2\).
If initial pressure is 100 atm and rate constant \(k\) is 3.38 \(\times\) 10\(^{-5}\) s\(^{-1}\). after 20 min the final pressure of N\(_2\)O\(_5\) will be

.......... is unstable at cooking temperature, whereas the control of sweetness of food is difficult while using ............... .

Barbiturates are used to treat

Which of the following artificial sweeteners can be used in soft drinks only?

Which of the following is added to soaps to impart antiseptic properties?

Which of the following is highly basic?

Identify the product formed in the given reaction.

Which among the following will not liberate nitrogen on reaction with nitrous acid?

The complex which does not show optical isomerism is

The oxidation state of nickel in [Ni(CO\(_4\))] is

What will be the emf of the following cell at 25\(^\circ\)C?
Fe/Fe\(^{2+}\) (0.001 M) | | H\(^+\) (0.01 M) | H\(_2\)(g) (1 Bar) | Pt(s)
\(E_{(F{e^{2+}} /Fe)}^o = - 0.44\) V; \(E_{({H^ + }/{H_2})}^o = - 0.00\) V

Calculate the molar conductance of 0.025 M aqueous solution of calcium chloride at 25\(^\circ\)C. The specific conductance of calcium chloride is 12.04 \(\times\) 10\(^{-2}\) Sm\(^{-1}\)

Which of the following as is responsible for acid rain?

Alkyl halides undergoing SN2 reaction do inverse

What can be A and B in the following reaction?

Which of the product is not possible in Wurtz reaction?

Which of the following statement is incorrect for H\(_2\)O\(_2\) structure?

pH of 10\(^{-3}\) M solution of KOH is

The system that forms maximum boiling azeotropes is

Which of the following does not affect solubility of a gas in liquid?

Which among the following forms minimum boiling azeotropes?
(i) Heptane + Octane
(ii) Water + Nitric acid
(iii) Ethanol + Water
(iv) Acetone + Carbon dioxide

The solution which have lowest freezing point is

Which of the following is used to prepare the inner lining of a blast furnace?

Give the correct order of acidity of

The cololur of CrO\(_4^{2-}\) changes to Cr\(_2\)O\(_7^{2-}\) is

KMnO\(_4\) acts as an oxidising agent in acidic medium. The number of moles of KMnO\(_4\) that will be required to react with one mole of oxalate ions (to form CO\(_2\)) in acidic solution is

Which of the following gas readily de-colourises the acidified KMnO\(_4\) solution?

Doping of silicon (Si) with indium (In) leads to the formation of