91- 6303239042
The correct order of CFSE of the following complex ions is $$[\text{Zn}(\text{NH}_3)_4]^{2+}$$, $$[\text{Co}(\text{NH}_3)_6]^{2+}$$, $$[\text{Co}(\text{NH}_3)_6]^{3+}$$, $$[\text{Ir}(\text{NH}_3)_6]^{3+}$$
Sign in
Please select an account to continue using cracku.in
↓ →
The correct order of CFSE of the following complex ions is $$[\text{Zn}(\text{NH}_3)_4]^{2+}$$, $$[\text{Co}(\text{NH}_3)_6]^{2+}$$, $$[\text{Co}(\text{NH}_3)_6]^{3+}$$, $$[\text{Ir}(\text{NH}_3)_6]^{3+}$$
Solvents are classified as polar and nonpolar based on their dipole moments. Given below are some solvents.
(p) 1,2-dibromobenzene (q) diisopropylether (r) trans-1,2-dichloroethene
(s) 1,2-dichloroethane (t) N-ethyl-N-methylpropan-1-amine
The set in which all solvents are polar is
Which of the following statement/s is/are correct?
I. Half-life is 50 % of the total time taken for the completion of a reaction
II. Collision frequency (Z), which is the number of collisions per second per unit volume, is same as the rate constant of the reaction
III. A change in the activation energy of a reaction at a particular temperature will result in a proportional change in the rate and rate constant of the reaction at the same temperature
IV. All first order reactions are not unimolecular
V. For a zero order reaction, slope of a plot of $$t_{1/2}$$ Vs. initial concentration will be zero
.webp)
The orange colour of $$\text{K}_2\text{Cr}_2\text{O}_7$$ and yellow colour of $$\text{K}_2\text{CrO}_4$$ are, respectively, due to
One mole of neon (atomic mass = $$20\ \text{g mol}^{-1}$$) and one mole of argon (atomic mass = $$40\ \text{g mol}^{-1}$$) are stored in two separate containers I and II, at temperature $$T$$ and $$2T$$ respectively. If both the gases are assumed to behave ideally
An aldehyde/ketone in the presence of a base forms a carbanion at the $$\alpha$$-position which can react with a carbonyl group in an Aldol type of reaction. It can also react with an olefinic double bond which is activated by groups like CO, CN, $$\text{NO}_2$$ attached to the double bond. The latter reaction is an addition reaction across the double bond. Wieland-Miescher ketone is an important synthetic intermediate used to synthesize many compounds
The pair of starting materials suitable for preparation of Wieland-Miescher ketone through a base catalysed reaction is
X in the following reaction is
When 0.805 g of the potassium salt $$(\text{CH}_2)_n(\text{COOK})_2$$ of a dibasic organic acid was reduced, 0.323 g of potassium was obtained. Molar mass of the acid is
Among (i) HCl, (ii) HOClO, (iii) $$\text{HOClO}_2$$ and (iv) $$\text{HOClO}_3$$, which cannot undergo a disproportionation reaction?
The electronic transition in $$\text{He}^+$$ ion that will occur at the same wavelength as that of the $$n = 2$$ to $$n = 1$$ transition in H atom is
P in the following reaction is
The number of stereoisomers is maximum for (ox = $$\text{C}_2\text{O}_4^{2-}$$)
Maximum number of electrons with $$m_s = \frac{1}{2}$$ which can be accommodated in subshells having total three nodes is
The Hinsberg test of the compound X produces a solid compound Y that is insoluble in 10 % aq. NaOH. Y dissolves in 10 % aq. sulphuric acid. The compound X is
An ionic species, $$\text{M}^{3+}$$, is isoelectronic with $$\text{CuCl}_2$$ and has $$(Z+2)$$ neutrons. The molar mass of $$\text{M}^{3+}$$ is
In compound X, the number of chiral centres and the number of peptide linkages are, respectively
Which of the following reactions is NOT an example of Lewis acid-Lewis base reaction?
A student intended to prepare 1000 mL of a 10 ppm solution of $$\text{K}^+$$ from KCl. He made appropriate calculations, weighed the salt accordingly and prepared the solution. However, after making the solution, he realized that the salt he used was $$\text{KNO}_3$$ and not KCl. The concentration of $$\text{K}^+$$ (ppm) in this prepared solution is
Oxide A is soluble in NaOH, oxide B in HCl and oxide C in both. The correct set of A, B and C is
Ascorbic acid (Vitamin C), a naturally occurring water soluble vitamin and abundantly found in lemon, shows antioxidant properties. In ascorbic acid, the OH with the lowest pKa is
Compound X $$(\text{C}_7\text{H}_{12}\text{O}_2)$$ gives i) a positive silver mirror test and ii) a yellow precipitate on treatment with $$\text{I}_2/\text{NaOH}$$. The compound X is
If the ratio of the concentrations of the oxidized and reduced forms of a species in an electrochemical reaction can be given as $$\frac{[\text{Ox}]}{[\text{Red}]} = 1.0 \times 10^{-3}$$, the correct expression among the following at $$25^\circ\text{C}$$ is
Among the following numbers, the one in which all the zeros are significant is
Among the following sets of compounds, the one in which a reaction between them followed by hydrolysis that does not lead to the formation of 1-phenyl-2-butanol is
At room temperature, NaCl(s) and KCl(s) were taken in equal masses and dissolved in equal volumes of water in two separate closed containers I and II respectively. Of the following, correct option/s is/are
In a pair of isomers of molecular formula $$\text{C}_5\text{H}_8$$ both the compounds undergo catalytic hydrogenation to form compounds of molecular formula $$\text{C}_5\text{H}_{10}$$. On ozonolysis followed by oxidative workup $$(\text{H}_2\text{O}_2)$$, one of the isomers gives a diacid $$(\text{C}_5\text{H}_8\text{O}_4)$$ while the other isomer gives a ketoacid $$(\text{C}_5\text{H}_8\text{O}_3)$$. The pair/s which give/s above set of reactions is/are
The resonance structures of $$\text{SCN}^-$$ are given below along with the S-C and C-N bond lengths
Among the following, the incorrect statement/s is/ are
The compound/s which form/s stable hydrate/s is/are
The formula/e which also represent/s a compound with formula X is/are
Following is the P vs V plot of a cyclic process $$1 \rightarrow 2$$, $$2 \rightarrow 3$$, $$3 \rightarrow 4$$, $$4 \rightarrow 1$$, denoted as I, II, III and IV respectively for a system of one mole of an ideal gas. Assume that there is heat exchange between the system and surroundings only in II and IV. Which of the following is/are correct?
For the given compound, % s character of phosphorous hybrid orbitals which contribute to various bonds are given in the table below.
This difference in % s character of various phosphorous bonds could be due to
$$\beta$$-carotene and related compounds are plant pigments that give red, orange and yellow vegetables their vibrant colour. The structure of $$\beta$$-carotene is given below.
It is approved as a food additive in many countries. The correct statement/s that describe/s $$\beta$$-carotene is/are
Educational materials for JEE preparation
