Reaction of Ethene with Bromine in CCl\(_4\) will result in

The following reaction is an example of:

In neutral or mild alkaline solutions, potassium permanganate oxidizes manganous salt \(\left( Mn ^{2+}\right)\) to ______________?

Arrange the following in decreasing order of the \(\text{pK}_\text{b}\) value :
(A) \(\text{C}_2\text{H}_5\text{NH}_2\)
(B) \(\text{C}_6\text{H}_5\text{NHCH}_3\)
(C) \((\text{C}_2\text{H}_5)_2\text{NH}\)
(D) \(\text{C}_6\text{H}_5\text{NH}_2\)
(E) \((\text{CH}_3)_3\text{N}\)
Choose the correct answer from the options given below :

Standard reduction potentials (\(\text{E}^{\circ}\)) of \(\text{Pb}^{2+}, \text{Ag}^+, \text{Cu}^{2+}\) and \(\text{Fe}^{2+}\) are \(-0.13 \text{ V}, +0.80 \text{ V}, +0.31 \text{ V},\) and \(-0.44 \text{ V}\) respectively. Which is the strongest reducing agent?

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Amines are considered as derivatives of ammonia obtained by replacement of hydrogen atoms with alkyl or aryl groups. In nature they occur among proteins, vitamins, alkaloids and hormones. These can be primary, secondary or tertiary depending on the number of hydrogen groups replaced. They can be prepared from nitro compounds, alkyl halides, nitriles, amides etc. Due to unshared pair of electrons they behave as Lewis bases. Influence of the number of hydrogen atoms at nitrogen atom is displayed in physical properties such as solubility, boiling point and chemical reactions including basicity. Basic character of amines is expressed in terms of their \(K_b\) and \(p K_b\) values. Three classes of amines can be distinguished with p-toluene sulphonyl chloride which reacts with primary and secondary ddu amines. Amino group when attached to benzene ring behaves as an activating and ortho para directing group.
Which of the following reaction is not given by aniline?

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Aldehydes, carboxylic acids and ketones are widespread in the animal and plant kingdoms.
They play a pivotal role in various biochemical processes of life. Their presence in nature adds fragrance and flavor. These compounds are widely used in food products, pharmaceuticals, paints, resins and other important product industries. These compounds are prepared by various laboratory methods, which mainly include oxidation, formylation, acylation and reduction. Due to the polar nature of the carbonyl group in aldehydes and ketones, they can exhibit different reactions like nucleophilic addition. They do exhibit redox and various condensation reactions which lead to the formation of various important compounds. On the other hand, the carboxylic acids are mainly prepared by oxidation and hydrolysis of different compounds. The carboxylic acid consists of a carbonyl group and the hydroxy group (attached to the carbonyl carbon atom). This makes it possible for the carboxylic acid to participate in various chemical reactions which involve cleavage of the C-OH bond and the O_H bond along with the reactions involving the complete -COOH group.
The products formed when 2,2-Dimethylpropan-1-al is heated with concentrated KOH are :

The standard reduction potential \(\left(E^{\circ}\right)\) values of \(Ag ^{+}\left| Ag , K ^{+}\right| K , Mg ^{2+} \mid Mg\) and \(Cr ^{3+} \mid Cr\) are \(0.80 V,-2.93 V,-2.37 V\) and -0.74 V respectively. The decreasing order of reducing power of the following metals is:
(A)\(A g\)
(B)\(K\)
(C)\(Mg\)
(D)\(Cr\)
Choose the correct answer from the options given below:

The carbohydrate used as storage molecule in plants is

The focal length of a lens depends on

The materials and devices do not obey Ohm's law when
(A) The relation between V and I is not unique, i.e., there is more than one value of V for the same current I
(B) The relation between V and I depends on the sign of V
(C) V ceases to be proportional to I
(D) The relation between V and I is linear
Choose the correct answer from the options given below:

Copper T is used as an Intra Uterine Device (IUD) for contraception. Identify
the correct statement for its mode of action
(A) It is made up of ionized copper.
(B) It releases Cu ions that suppress sperm motility.
(C) It makes the uterus unsuitable for implantation.
(D) It decreases sperm phagocytosis within the uterus.

Which of the following is correct about the nature of ligand?