In the conversion of ethanol to ethene, the first step of the reaction involves the formation of

Intermolecular hydrogen bonding is observed between chloroform and acetone.
Therefore, their binary solution will_
(A) Show positive deviation from Raoult's law
(B) Show negative deviation from Raoult's law
(C) Obey Raoult's law
(D) Show decrease in vapor pressure
Choose the correct answer from the options given below:

Identify the type of defect in the above solid. (The image for the 'above solid' is missing but question asks to identify defect in 'the above solid')

The product obtained, when starch is hydrolyzed with dilute sulphuric acid at 393 K under pressure, is
\(\left(C_6 H_{10} O_5\right)_n+n H_2 O\xrightarrow[898 K ; 2-8 am]{H^{+}} ?\)

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 benzene sulphonyl chloride gives a compound B which easily dissolves in an alkali : then A is :

Read the passage carefully and answer the questions
Carboxylic acids are the organic compounds which comprise of carboxyl functional group, -COOH. These are generally found in nature, some higher members are known as fatty acids as they occur in natural fats as esters of glycerol. They can be prepared from oxidation of alcohols and aldehydes, hydrolysis of nitriles and amides and Grignard reagents. They are stronger acids than simple phenols and alcohols. but weaker than mineral acids. Substituents affect the acidity of aliphatic and aromatic carboxylic acids. They undergo reactions involving cleavage of -OH and C-OH bond. Carboxylic acids having an alpha hydrogen get halogenated in the presence of red phosphorus to form alpha halo carboxylic acids. The reaction is known as Hell Volhard Zelinsky reaction. Besides these aromatic carboxylic acids undergo electrophilic substitution reactions. They are versatile and are employed in the manufacture of various useful compounds. For example, methanoic acid is used in rubber, textile, dyeing, leather and electroplating industries. Higher fatty acids are used in the manufacture of soaps and detergents. Esters of Benzoic acid are used in perfumery.
Benzoic acid in the presence of conc. \(HNO _3\) and conc. \(H _2 SO _4\) gives major product as:

Acidified potassium dichromate oxidises iodides to \(\underline{X}\), sulphides to \(\underline{Y}\) and tin (II) to \(\underline{Z}\). \(X\), \(Y\) and \(Z\) respectively are:

\(\int \frac{d x}{\sqrt{5-4 x-x^2}}\) is equal to :

For a normal human eye, rearrange the parts of the eye as they are situated in the path of the light entering the eye:
(A) Vitreous Humor
(B) Cornea
(C) Ciliary muscles
(D) Aqueous Humor
(E) Retina
Choose the correct answer from the options given below:

Nitin has taken the subjects mathematics, physics and chemistry. The probability of him getting grade A in these subjects are respectively 0.2, 0.3 and 0.9. Getting grades in different subjects are regarded as independent events. The probability of getting A grade by him, either in mathematics or physics, is

Read the following paragraph and answer the given questions.
Bio-fertilisers are organisms that enrich the nutrient quality of the soil like cyanobacteria, while there are organisms that help to control plant diseases and pests. The very familiar beetle, the ladybird and dragonflies are useful to get rid of aphids and mosquitoes, respectively. An example of microbial biocontrol agents that can be introduced to control butterfly caterpillars is certain bacteria, which are available in sachets in the form of dry spores. These spores are mixed with water and sprayed onto vulnerable plants. Trichoderma species that are very common in the root ecosystem, are very effective biocontrol agents of several plant pathogens.Baculoviruses attack insects and other arthropods. Usage of these viruses is desirable when an ecological sensitive area is being treated.
Trichoderma is a/an:

Arrange the following spermatogenic cells in correct sequence of spermatogenesis.
(A) Spermatids
(B) Spermatogonium
(C) Secondary Spermatocytes
(D) Primary Spermatocytes
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Derivative of \(2 x^2\) with respect to \(5 x^4\) is: