List of practice Questions

Identify the homoleptic complexes with odd number of d-electrons in the central metal:

In the sulphur estimation, 0.20 g of a pure organic compound gave 0.40 g of barium sulphate. The percentage of sulphur in the compound is

Given below are two statements:
Statement (I): On nitration of m-xylene with $\text{HNO}_3$, $\text{H}_2\text{SO}_4$, followed by oxidation, 4-nitrobenzene-1, 3-dicarboxylic acid is obtained as the major product.
Statement (II): CH$_3$ group is o/p-directing while NO$_2$ group is m-directing group.
In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements:
Statement (I): It is impossible to specify simultaneously with arbitrary precision, the linear momentum and the position of a particle.
Statement (II): If the uncertainty in the measurement of position and uncertainty in measurement of momentum are equal for an electron, then the uncertainty in the measurement of velocity is $\geq \sqrt{\frac{h}{\pi}} \times \frac{1}{2m}$.
In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements:
Statement (I): NaCl is added to the ice at $0^\circ C$, present in the ice cream box to prevent the melting of ice cream.
Statement (II): On addition of NaCl to ice at $0^\circ C$, there is a depression in freezing point.
In the light of the above statements, choose the correct answer from the options given below:

Identify the essential amino acids from below:
(A) Valine
(B) Proline
(C) Lysine
(D) Threonine
(E) Tyrosine
Choose the correct answer from the options given below:

Drug X becomes ineffective after 50% decomposition. The original concentration of drug in a bottle was 16 mg/mL which becomes 4 mg/mL in 12 months. The expiry time of the drug in months is ____ . Assume that the decomposition of the drug follows first order kinetics.

Isomeric hydrocarbons $\rightarrow$ negative Baeyer's test (Molecular formula $\text{C}_9\text{H}_{12}$). The total number of isomers from above with four different non-aliphatic substitution sites is -

Given below are two statements:
Statement (I): In partition chromatography, the stationary phase is a thin film of liquid present in the inert support.
Statement (II): In paper chromatography, the material of paper acts as a stationary phase.
In light of the above statements, choose the correct answer from the options given below:

Consider the equilibrium: $$\text{CO(g)} + \text{3H}_2\text{(g)} \rightleftharpoons \text{CH}_4\text{(g)} + \text{H}_2\text{O(g)}$$ If the pressure applied over the system increases by two fold at constant temperature then:

If $$\text{C(diamond)} \rightarrow \text{C(graphite)} + X \, \text{kj mol}^{-1}$$ $$\text{C(diamond)} + \text{O}_2(g) \rightarrow \text{CO}(g) + Y \, \text{kj mol}^{-1}$$ $$\text{C(graphite)} + \text{O}_2(g) \rightarrow \text{CO}(g) + Z \, \text{kj mol}^{-1}$$ At constant temperature. Then:

Match List-I with List-II:

Choose the correct answer from the options given below:

In the Claisen-Schmidt reaction to prepare dibenzalacetone from 5.3 g benzaldehyde, a total of 3.51 g of product was obtained. The percentage yield in this reaction was _____.