What is the IUPAC name of resorcinol?

Answer the question on the basis of passage given below:
Aldehydes are generally more reactive than ketones in nucleophilic addition reactions due to steric and electronic reasons. Sterically, the presence of two relatively large substituents in ketones hinders the approach of nucleophile to carbonyl carbon more than aldehydes having only one such substituent Electronically aldehydes are more reactive than ketones because two alkyl groups reduce the elctrophilicity of the carbonyl more effectively than in former.
4-Hydroxy-4-methylpentan-2-one and 4-methylpent-3-en-2-one are the products obtained from A by aldol
condensation. \(A\) is:

Which among the following are correctly matched?
A. \(C_6H_5OCH_2CH_3\) - Phenetole
B. \(C_6H_5O(CH_2)_6CH_3\) - Heptyl phenyl ether
C. \(C_6H_5OCH_3\) - Dimethyl ether
D. \(C_2H_5OCH_2CH_3\) - Methyl ethyl ether
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Which of the following is a fat soluble vitamin?

Which of the following compounds will not undergo azo coupling reaction with benzene diazonium chloride?

The freezing point of an aqueous solution containing 23 g of \(C _2 H _5 OH\) in 1000 g of water, is
(Given \(K_f\) for water \(\left.=1.86 K kg mol ^{-1}\right)\)

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Organic compounds derived from NH3 by replacing one or more H-atoms with alkyl or aryl groups will form primary, secondary and tertiary amines. The common methods which include their preparations are reduction of nitro group, amide group and nitrile group, Gabriel phthalimide synthesis and ammonolysis of alkyl halides. Amines are basic in nature due to the presence of a lone pair of electrons on the nitrogen atom. Important chemical properties of amines include acylation, alkylation and their interaction with nitrous acid. There are various tests which can distinguish different types of amines from each other, for e.g. carbylamine test, Hinsberg's test, coupling reaction etc. Another important class of compounds which can be derived from primary amines is azo compounds. These compounds are intensely colored and widely used as dyes in textile, leather and food industries.
How many different structural isomers that correspond to the molecular formula \(\mathrm{C}_3 \mathrm{H}_9 \mathrm{~N}\) are possible? Out of these, how many will give a positive carbylamine test?

Primary Endosperm Nucleus is the product of :

Area of a rectangle having vertices \(P, Q, R\) and \(S\) with position vectors \(-\hat{i}+\frac{1}{2} \hat{j}+4 \hat{k}, \hat{i}+\frac{1}{2} \hat{j}+4 \hat{k}, \hat{i}-\frac{1}{2} \hat{j}+4 \hat{k}\) and \(-\hat{i}-\frac{1}{2} \hat{j}+4 \hat{k}\) respectively is :

The vector equation of line passing through (2, -1, 3) and perpendicular to the lines \(\frac{x-2}{3}=\frac{y-1}{1}=\frac{z+2}{2} \quad\) and \(\quad \frac{x+3}{-4}=\frac{y-5}{-3}=\frac{z+1}{2}\)
(Here \(\lambda\) is a parameter)

Which one of the following statements is incorrect about ecological pyramids?

Match List I with List II

LIST I	LIST II
A. Transducer	I. High frequency wave
B. Modulated Waves	II. Receiver
C. Band width	III. Provides output in electrical form
D. Demodulator	IV. Range of frequencies over which communication system works.

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The area of the triangle whose vertices are \((3,8),(-4,2)\) and \((5,1)\) is