Transition metal ions having zero unpaired electrons are:
(A) \(Sc^{3+}\)
(B) \(Ti^{3+}\)
(C) \(Cu^{2+}\)
(D) \(Zn^{2+}\)
(E) \(Mn^{2+}\)
Choose the correct answer from the options given below:

Number of hydrogen bond formed between adenine and thymine to connect each other is /are

Read the passage carefully and answer the questions:
Optically active polyhydroxy aldehydes or ketones or molecules which provide such units on hydrolysis are called carbohydrates. They can be broadly classified as monosaccharides, disaccharides and polysaccharides depending on their behavior towards hydrolysis. They are also classified as reducing or non-reducing sugars. Another class of biomolecules is proteins which are polymers of twenty different amino acids linked by peptide bonds. Amino acids can be classified as acidic, basic or neutral depending on the relative number of amino and carboxyl groups in their molecule. The essential amino acids cannot be synthesized by our body and hence must be provided through diet. Nucleic acids are the polymers of nucleotides which in turn consist of a base, pentose sugar and phosphate. There are two types of nucleic acids namely, DNA and RNA which differ in the composition of sugar and a base
The side chain (R group) present in the "Aspartic Acid" amino acid is:

What is the product of the following reaction?

Which of the following processes is responsible for the formation of a Delta when river water meets the sea water?

The \(\alpha\) and \(\beta\) forms of glucose are known as

Answer the question on the basis of passage given below :
There are three kinds of amines which are primary, secondary and tertiary amines. These amines may have alkyl group or aryl group or both alkyl and aryl groups. These amines can be distinguished from one another by various chemical tests.
An amine A on treatment with \(\text{HNO}_2\) gives \(\text{N}_2\text{(g)}\) and an alcohol B. The molecular mass of alcohol B is 46.
The amine A is :

A sofa set costing ₹ \(36000\) has a useful life of \(10\) years. If the annual depreciation is ₹ \(3000\) , then the scrap value by linear method is:

A machine costing Rs. \(2,00,000\) has a useful life of 5 years. The estimated scrap value is Rs. 20,000 . By using straight line method, the annual depreciation is

The puffed-up appearance of dough is due to the production of :

Solution of differential equation \(\frac{d y}{d x}=\cos (x+y+3)\) is:

A magnetic needle lying parallel to a magnetic field requires \( W \) units of work to turn it through \( 60^\circ \). The torque needed to maintain the needle in its position, will be :

When \(CuSO_4\) solution is electrolysed using platinum electrodes, which of the following is true ?