Process of sone reflning is used in the purification of

Name the reaction when a mixture of acetaldehyde and propanal is treated with aqueous alkali solution.

The vapour pressure of pure water at \(25^{\circ} C\) is 23.75 mmHg.
The vapour pressure of the solution obtained by dissolving 34.2 g of sucrose \(\left( C _{12} H _{22} O _{11}\right)\) in 100 g of water will be :

Colligative properties are applicable to:

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Werner in 1898, propounded his theory of coordination compounds. In coordination compounds metals show two types of linkages (valences)-primary and secondary. The primary valences are normally ionisable and are satisfied by negative ions. The secondary valences are non-ionisable. These are satisfied by neutral molecules or negative ions. The secondary valence is equal to the coordination number and is fixed for a metal. The ions or group bound by the secondary linkages to the metal have characteristic spatial arrangements corresponding to the different coordination numbers. Both double salts as well as complexes are formed by the combination of two or more stable compounds in stoichiometric ratio. However, they differ in the fact that double salts such as carnallite, Mohr's salt, potash alum etc. dissociate into simple ions completely when dissolved in water. But complex ions do not dissociate completely into simple ions.
Which of the following is a double salt?

Match List-l with List-ll

List-I (Name of the molecule/drug)	List-II (Use/disease name)
(A) Thyroxine	(I) Scurvy
(B) Ascorbic acid	(II) Thyroid gland
(C) Steroid hormones	(III) Identification of criminals
(D) DNA fingerprinting	(IV) Adrenal cortex

Choose the correct answer from the options given below:

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Haloalkanes undergo nucelophilic substitution reactions owing to the polarity of C X bond. The nucleophile reacts with the haloalkane on the carbon possessing a partial positive charge holding the halogen atom. The halogen atom \(X\) is replaced by a nucleophile. Depending on the kinetics and mode of bond breaking, the mechanism can be either SN1 or SN2 reaction. The rate of SN1 reaction is governed by the stability of carbocation and in SN2 reaction, the rate of reaction is governed by steric factor. Chirality is the main factor in both SN1and SN2. In SN1 reaction, the chirality of alkyl halide is accompanied by racemization of the product, while in SN2 reaction, the product is characterized by inversion of configuration. The structure of alkyl halide and the nature of the solvent also governs the mechanism of the substitution.
What is chiral carbon ?

If \(x y=e^{(x-y)}\), then \(\frac{d y}{d x}\) is equal to:

The meter bridge is a device

Which of the following is not correct?

The area of the region bounded by \(y=-1, y=2, x=y^3\) and \(x=0\) is \(\frac{m}{n}\) sq. units, where \(\operatorname{gcd}(m, n)=1\), then \(m-n\) is equal to

If \(x\) is real, the minimum value of \(x^2-8 x+20\) is :

Select the conditions(s) in which decomposition does not takes place in
A. In warm and moist environment
B. In presence of decomposers
C. In absence of decomposers
D. In absence of detritivores
E. In presence of complex compounds like lignin and chitin.
Choose the correct answer from the options given below: