In the given complexes, the heteroleptic complexes is/are:
A. \(\left[ Co \left( NH _3\right)_6\right]^{3+}\)
B. \(\left[ Cr \left( H _2 O \right)_6\right]^{3+}\)
C. \(\left[ Ni ( Cl )_2\left( PPh _3\right)_2\right]\)
D. \(\left[ Co \left( NH _3\right)_4 Cl _2\right]^{+}\)
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An aqueous solution of urea has a freezing point of \(\text{– } 0.52^{\circ}\text{C}\). Predict the osmotic pressure of the solution at \(37^{\circ}\text{C}\) [\(K_f = 1.86\), assuming that the molar concentration and molality are numerically equal]

The common name of the following compound is

Which of the following compounds comprise of a phenolic group?
(A) Salicylic acid
(B) Salicylaldehyde
(C) Cresol
(D) Catechol
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What types of bond (linkage) are present in nucleotide?

The IUPAC name of allylamine is.

Find the correct stoichiometric coefficients in the following redox equation:
\(\text{xH}^+ + \text{y C}_6\text{H}_5\text{CH}_3 + \text{w MnO}_4^- \rightarrow \text{a H}_2\text{O}+\text{b Mn}^{2+}\text{ + t C}_6\text{H}_5\text{COOH}\)
Choose the correct set of values for (x, y, w, a, b, t)

\(\int \frac{d x}{x^3 \sqrt{\left(1+x^4\right)}}=\)

Read the passage carefully and answer the questions
Replacement of a hydrogen atom in a hydrocarbon by an alkoxy or carboxyl group yields a class of compounds known as ethers. Ethers are classified as symmetrical or unsymmetrical on the basis of groups attached to the oxygen atoms. Diethyl ether, a symmetrical ether, has been widely used as an inhalation anesthetic. Ethers can be prepared by acid catalyzed intermolecular dehydration of alcohols and Williamson's synthesis. Acid catalyzed dehydration of alcohols is not generally preferred as it gives a mixture of elimination and substitution products. In Williamson's synthesis, an alkyl halide is allowed to react with sodium alkoxide. Ethers containing substituted Alkyl groups may also be prepared by this method. The C-O bond in ether is weakly polar and is cleaved under drastic conditions with excess of hydrogen halides. In electrophilic substitution, the alkoxy group deactivates the aromatic ring and directs the incoming group to ortho and para positions.
In Williamson synthesis, the alkoxide ion attacks the alkyl halide via which pathway?

Match List-I with List-II

List-I (Components of binary solution)	List-II (Deviation from Raoult's Law)
(A) Ethanol and water	(I) Positive
(B) Chloroform and acetone	(II) No deviation
(C) n-Hexane and n-heptane	(III) Negative
(D) Carbon disulphide and acetone	(IV) Large positive
(D) Carbon disulphide and acetone	(IV) Large positive

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If \(A=\left[\begin{array}{lll}a & 0 & 0 \\ 0 & a & 0 \\ 0 & 0 & a\end{array}\right], a \neq 0\) then \(|\operatorname{adj} A|\) is equal to

The relation \(R\) on the set of real numbers defined by \(R=\left\{(a, b): a \leq b^2\right\}\) is

A converging lens is used to form image on a screen. When the lower half of the lens is covered by an opaque screen then, the correct statements are :
(A) Intensity of Image will decrease.
(B) Intensity of Image will increase.
(C) Complete Image will be formed.
(D) Half the Image will disappear.