Arrange the following compounds in increasing order of boiling point.
(A) Ethanol
(B) Diethyl ether
(C) Ethanal
(D) Ethane
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Read the passage carefully and answer the Questions
Carboxylic acids are the earliest organic compounds isolated from nature. These are also known as organic acids but are weaker acids as compared to mineral acids. However, they are more acidic than alcohols and phenols because of greater resonance stabilization of the parent acid and its conjugate base. The acidic strength is determined by the \(K _a\), which is called the acidity constant. The greater the value of \(K _a\), the greater the tendency of the acid to ionize and hence the stronger the acid. The acidic strength of the saturated aliphatic carboxylic acid depends upon the inductive effect and its position with respect to - COOH groups. Electron -donating substituents tend to decrease whereas electron -withdrawing substituents tend to increase the acidic strength. The acidic strength of the aromatic carboxylic acid, on the other hand depends upon both the inductive effect and the resonance effect of the substituents.
p-Nitrobenzoic acid is a stronger acid than benzoic acid because of

Arrange the following amines in order of their increasing basic strength:

The steam distillation method is used for the separation of 1 : 1 mixture of p-nitrophenol and o-nitrophenols because

Calculate the molality of 25 g of ethanoic acid \(CH(_3\)\(\mathrm{COOH}\)) in 250 g benzene

An oxidation of phenol with chromic acid produces

Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human beings?

If 4 individuals in a laboratory population of 40 fruitflies died during a specific time interval of one week. What will be the death rate of the population during that period?

The near point of a hypermetropic person is 80 cm from the eye. The power of lens, required to enable the person to read clearly a book held at 25 cm from the eye is:

If the matrix \(A=\left[\begin{array}{cc}2-x & 3 \\ 2 & 1-x\end{array}\right]\) is singular, then value(s) of \(x\) are :

The polypeptide chains A and B in Insulin are linked together by:

Arrange the following events in correct sequence.
A. Transformation of morula into blastocyst.
B. Fusion of sperm with an ovum
C. Implantation
D. Initiation of mitotic division in zygote and formation of morula
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Identify the floral reward offered to insects for pollination:
A. Pollen grains
B. Nectar
C. Fragrance
D. Safe place to lay eggs
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