Choose the correct sequence for the increasing boiling point of the following compounds.
(A) Pentan-1-ol
(B) Butan-2-ol
(C) Ethanol
(D) Propan-1-ol
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"Soft drink bottles are sealed under high pressure to increase the solubility of carbon dioxide" is the application of
which of the following laws :

Arrange the following ligands in increasing order of their field strength:
(A) SCN-
(B) F-
(C) H2O
(D) CO
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Select the Lanthanoids which show +2 oxidation state?
(A) Yb
(B) Ce
(C). Eu
(D) Ho
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The degeneracy of the \(d\) orbitals has been removed due to ligand electron-metal electron repulsions in the octahedral comple: to yield three orbitals of lower energy, \(t_{2 g}\) set and two orbitals of higher energy, \(e_g\) set. This splitting of the degenerate levels due to the presence of ligands in a definite geometry is termed as crystal field splitting and the energy separation is denoted by \(\Delta_0\). Thus energy of the two \(e_g\) orbitals will increase by \((3 / 5) \Delta_0\) and that of three \(t_{2 g}\) will decrease by \((2 / 5) \Delta_0\). The crystal field splitting \(\Delta_0\) depends upon the field produced by the ligand and charge on the metal ion. Some ligands are able to produce strong fields, in which case the splitting will be large, whereas others produce weak fields and consequently result in small splitting of \(d\) orbitals. Relative magnitude of crystal field splitting energy \(\Delta_0\) and pairing energy, \(P\) (energy required for electron paring in a single orbital) determine the formation of low spin ( \(\Delta_0>P\) ) or high spin ( \(\Delta_0<P\) ) complex. In tetrahedral coordination entity formation, the \(d\)-orbital splitting is inverted and is smaller as compared to the octahedral field splitting. The crystal field theory attributes the colour of the complex to \(d-d\) transition of the electron. The colour of the coordination compounds depends on the crystal field splitting. In the absence of ligand, crystal field splitting does not occur and hence the substance is colourless.
Which of the following complex is not expected to be coloured?

Alum helps in purifying water by :
A. Coagulation of mud particles
B. Sedimentation of mud particles.
C. Dialysis
D. forming true solution with water
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Read the passage carefully and answer the Questions
Aldehydes and ketones are important organic compounds prepared mainly by oxidation of alcohols. Primary alcohols give aldehyde and secondary alcohols yield ketones. Aldehydes can also be formed by partial reduction of acid chlorides, reduction of esters or by Gattermann-Koch reaction. Ketones are prepared by Friedel-Craft's acylation, hydration of alkyne and reaction of Grignard's reagent with nitriles. Chemically, aldehydes and ketones are reactive in nature due to the carbonyl group and undergo nucleophilic addition reactions. Aldehydes are more reactive than ketones and can be oxidized to carboxylic acids, while both can be reduced to alcohols or hydrocarbons and exhibit condensation reaction.
When two moles of benzaldehyde are heated with concentrated NaOH solution, the product/s obtained is/are:

The half life of a radioactive substance is 30 s. Calculate the time taken for the sample to decay to \( \frac{3}{4} \) th its initial value.

The area of the region given by \(\left\{(x, y): y \geq x^2, y \leq|x|+2\right\} \backslash-\backslash-\backslash-\backslash-\backslash-\) is

Ribonuclease make cuts in

The pair(s) of co-ordination complexes/ions exhibiting the same kind of isomerism is/are :
(A) \(\left[ Cr \left( NH _3\right)_5 Cl \right] Cl _2\) and \(\left[ Cr \left( NH _3\right)_4 Cl _2\right] Cl\)
(B) \(\left[ Co \left( NH _3\right)_4 Cl _2\right]^{+}\)and \(\left[ Pt \left( NH _3\right)_2\left( H _2 O \right) Cl \right]^{+}\)
(C) \(\left[ CoBr _2 Cl _2\right]^{2-}\) and \(\left[ PtBr _2 Cl _2\right]^{2-}\)
(D) \(\left[ Pt \left( NH _3\right)_3\left( NO _3\right)\right] Cl\) and \(\left[ Pt \left( NH _3\right)_3 Cl \right] Br\)
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An \( 80 \, \Omega \) resistor is connected to a 240 V, 50 Hz AC supply. The net power consumed over a full cycle is:

In an ecosystem, if a fish is feeding on zooplankton, it is a: