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Which of the following is a polar molecule?
The bond order of 1.5 is shown by:
The correct order of increasing bond order among the given is:
The hybridisation of Ni in the complex $[Ni(CN)_4]^{2-}$ is: (Atomic number of Ni = 28)
Which of the following statements is incorrect? (1) Morels and truffles are edible delicacies. (2) Claviceps is a source of many alkaloids and LSD. (3) Conidia are produced exogenously and ascospores endogenously. (4) Yeasts have filamentous bodies with long thread-like hyphae.
Which of the following molecule does not possess a $\pi$ bond?
Identify the correct statement for the change of Gibbs energy for a system ($\Delta G_{\text{system}}$) at constant temperature and pressure:
Which of the compounds given below will exhibit a linear structure?
A molecule among the following that has the maximum dipole moment is:
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by :
$H_{2}O$ is dipolar, whereas $BeF_{2}$ is not. It is because:
Which of the two species, $NO_{3}^{-}$ or $H_{3}O^{+}$, has the correctly described properties listed below?
Match the following oxides with their nature: **Column I** (a) CO (b) BaO (c) Al₂O₃ (d) Cl₂O₇ **Column II** (i) Basic (ii) Neutral (iii) Acidic (iv) Amphoteric
Use of an artificial kidney during hemodialysis may result in : (a) Nitrogenous waste build-up in the body (b) Non-elimination of excess potassium ions (c) Reduced absorption of calcium ions from gastro-intestinal tract (d) Reduced RBC production. Which of the following options is the most appropriate?
The tendency of $\text{BF}_3$, $\text{BCl}_3$, and $\text{BBr}_3$ to behave as Lewis acid decreases in the sequence:
Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has a high melting point?
$\Delta E^{\circ}$ of combustion of isobutylene is $-X \text{ kJ mol}^{-1}$. The value of $\Delta H^{\circ}$ is [DCE 2004]:
The densities of graphite and diamond at 298 K are 2.25 and 3.31 g cm⁻³, respectively. If the standard free energy difference (∆Gº) is equal to 1895 J mol⁻¹, the pressure at which graphite will be transformed into diamond at 298 K is:
Match the following columns and select the correct option. Column-I (a) Organ of Corti (i) Connects middle ear and pharynx (b) Cochlea (ii) Coiled part of the labyrinth (c) Eustachian tube (iii) Attached to the oval window (d) Stapes (iv) Located on the basilar membrane
Which of the following statement is not correct regarding a rhizome?