In the presence of air, phenols are slowly oxidised to dark coloured mixture containing-

On heating, \(\left[ Ti \left( H _2 O \right)_6\right] Cl _3\) becomes colorless because \(\backslash\) ldots \(\backslash\) ldots \(\backslash\) ldots

Match List - I with List - II.

List - I (Process)	List - II (Metal)
A. Electrolytic reduction	I. Iron
B. Bessemerization	II. Zinc
C. Smelting	III. Aluminium
D. Reduction from oxide	IV. Copper

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Exposure of chloroform in air in the presence of sunlight releases a gas which is poisonous. Identify the gas.

Arrange the following haloalkanes in decreasing order of boiling point - Chloromethane, Bromomethane, dibromomethane, bromoform

Match List I with List II.

List-I	List-II
A. Ni	I. 3d series
B. Cu	II. Lanthanoid contraction
C. Gd	III.\(d^{10}\)
D. Cs	IV. Alkali metal

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Read the passage carefully and answer the questions
Carbohydrates are naturally formed organic compounds from various plants. The common chemical formula, \(C _x\left( H _2 O \right)_y\), was considered as hydrates of carbon to derive the various carbohydrates. For instance, the general formula for glucose ( \(C _6 H _{12} O _6\) ) easily fits into the above formula. Carbohydrates also called saccharides are classified on the basis of their behavior towards hydrolysis. Monosaccharides cannot be hydrolyzed further to simpler units of polyhydroxy aldehyde or ketones. About 20 monosaccharides are known to occur in nature. Carbohydrates that yield large number of monosaccharide units are called polysaccharides. Amino acids contain ( \(- NH _2\) ) and ( - COOH ), which can be classified in various forms. Proteins are polymers of alpha amino acids which are connected to each other by a peptide bond or peptide linkage. When a native protein is subjected to physical change, its globules unfold and helix get uncoiled and the protein loses its biological activity. The protein is said to be denaturated.
Which of the following statements is incorrect for Lactose ?

In the context of the Photoelectric effect, identify the statements which support quantum nature of light.
(A) The electric charge of photoelectrons is quantized
(B) The maximum kinetic energy of photoelectrons depends on the frequency of the incident light, but is independent of its intensity
(C) The photoelectric emission is an instantaneous process without any apparent time lag, even when the incident radiation is made exceedingly dim
(D) There is a minimum frequency of light below which no photoelectrons are emitted
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Assume P, Q, R and W are matrices of order \(3 \times 3, a \times 4, b \times c\) and \(d \times a\) respectively. If PQ + WR is well is well defined, find the value of ab + cd

In 1953, S.L. Miller performed an experiment where he observed the fraction of amino acids. The precursors

In a box containing 100 bulbs, 10 are defective.
The probability that out of a sample of 5 bulbs none is defective is:

The break-even point is the level of production where

There are two kinds of nucleases - exonucleases and endonucleases. Exonucleases remove nucleotides from the ends of the DNA whereas, endonucleases make cuts at specific positions within the DNA. The cutting of DNA by restriction endonucleases results in the fragments of DNA. These fragments can be separated by a technique known as gel electrophoresis. Since DNA fragments are negatively charged molecules they can be separated by forcing them to move towards the anode under an electric field through a medium/matrix. Small volume cultures cannot yield appreciable quantities of products. To produce in large quantities, the development of bioreactors, where large volumes (100 - 1000 litres) of culture can be processed, was required. Thus, bioreactors can be thought of as vessels in which raw materials are biologically converted into specific products, individual enzymes, etc., using microbial plant, animal or human cells. PCR stands for Polymerase Chain Reaction. In this reaction, multiple copies of the gene (or DNA) of interest are synthesised in vitro using two sets of primers (small chemically synthesised oligonucleotides that are complementary to the regions of DNA) and the enzyme DNA polymerase.
Which one of the following statements is correct about DNA separation and isolation?