Arrange the following in increasing order of their basic strength in aqueous solution:
(A) \(CH_{3}NH_{2}\)
(B) \(C_{6}H_{5}CH_{2}NH_{2}\)
(C) \(C_{6}H_{5}NH_{2}\)
(D) \((CH_{3})_{3}N\)
Choose the \textbf{correct} answer from the options given below:

A cell is formed by combining given electrodes with \(Zn ^{2+} \mid Zn ( s )\left(E^{\circ}=-0.76 V\right)\). Arrange the following in decreasing order of \(E _{\text {cell }}^{\circ}\).
Cell Notation: \(Zn ( s ) \mid Zn ^{2+} \|\) Given electrode
(A) \(Ag ^{+} \mid Ag ( s ): E^{\circ}=+0.80 V\)
(B) \(Na ^{+} \mid Na ( s ): E^{\circ}=-2.71 V\)
(C) \(Fe ^{2+} \mid Fe ( s ): E^{\circ}=-0.44 V\)
(D) \(Cu ^{+} \mid Cu ( s ): E^{\circ}=+0.52 V\)
Choose the correct answer from the options given below:

Arrange the following amines in increasing order of basic strength in gaseous phase
(A) \(\left(\mathrm{CH}_3\right)_3 \mathrm{~N}\)
(B) \(\mathrm{CH}_3 \mathrm{NH}_2\)
(C) \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2\)
(D) \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{NH}_2\)
Choose the correct answer from the options given below:

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Alcohols and phenols are obtained when a hydrogen atom in aliphatic and aromatic hydrocarbons respectively, is replaced by \(OH\) group. These compounds find wide applications in industry as well as in our daily life. You may notice that ordinary spirit is used for polishing wooden furniture which is chiefly a compound containing hydroxyl group. An alcohol contains one or more hydroxyl \((OH)\) group(s) directly attached to carbon atom(s), of an aliphatic system \((CH_3OH)\) while a phenol contains \(OH\) group(s) directly attached to carbon atom(s) of an aromatic system \((C_6H_5OH)\). Alcohols are prepared by the hydration of alkenes, fermentation of glucose, and reduction of carbonyl compounds. Alcohols produce alkenes upon dehydration whereas alkenes on acid catalyzed hydration convert into alcohols.
Which of the following compounds lacks phenolic group?

Which of the following is/are not considered as transition elements?
Ag, Mo, Zn, Hg, W

Name the reaction when a mixture of acetaldehyde and propanal is treated with aqueous alkali solution.

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Werner in 1898, propounded his theory of coordination compounds. In coordination compounds metals show two types of linkages (valences)-primary and secondary. The primary valences are normally ionisable and are satisfied by negative ions. The secondary valences are non-ionisable. These are satisfied by neutral molecules or negative ions. The secondary valence is equal to the coordination number and is fixed for a metal. The ions or group bound by the secondary linkages to the metal have characteristic spatial arrangements corresponding to the different coordination numbers. Both double salts as well as complexes are formed by the combination of two or more stable compounds in stoichiometric ratio. However, they differ in the fact that double salts such as carnallite, Mohr's salt, potash alum etc. dissociate into simple ions completely when dissolved in water. But complex ions do not dissociate completely into simple ions.
When \(1 mol CrCl _3 \cdot 6 H _2 O\) is treated with excess of \(AgNO _3, 3 mol\) of AgCl are obtained. The formula of the complex is:

Which of the following is NOT a step of decomposition process?

The function \(f(x)=x e^x\) increases only for:

Choose the correct statements from the following:
A. Displacement current is due to time varying magnetic field.
B. The frequency of the electromagnetic wave naturally equals the frequency of oscillation of the charge.
C. Light carries energy from the Sun to the Earth.
D. Electromagnetic wave does not exert pressure.
E. Electromagnetic wave contains both electric and magnetic field.
Choose the correct answer from the options given below:

A medicinal plant growing in different Himalayan ranges shows different potency and concentration of the active chemical (reserpine) that the plant produces. Identify the plant:

A boat can row at the speed of \(16 km / hr\) in still water. If the river is flowing at \(8 km / hr\), and it takes 8 hours for a round trip, then the distance between the two places is :

The charge flowing in an electrical circuit is given by the equation \( Q = t^2 - 2t + 4 \). The current in the circuit at \( t = 2 \text{ sec} \) is: