For emission line of atomic hydrogen from $$n_i = 8$$ to $$n_f = n$$, the plot of wave number $$\bar{\nu}$$ against $$\frac{1}{n^2}$$ will be: (The Rydberg constant, $$R_H$$ is in wave number unit)
JEE WhatsApp Group
Sign in
Please select an account to continue using cracku.in
↓ →
JEE WhatsApp Group
Join Our JEE Preparation Group
Prep with like-minded aspirants; Get access to free daily tests and study material.
For emission line of atomic hydrogen from $$n_i = 8$$ to $$n_f = n$$, the plot of wave number $$\bar{\nu}$$ against $$\frac{1}{n^2}$$ will be: (The Rydberg constant, $$R_H$$ is in wave number unit)
Login to view the detailed solution.
In general, the properties that decrease and increase down a group in the periodic table, respectively, are:
Login to view the detailed solution.
Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in +1 and +3 oxidation states. This is due to:
Login to view the detailed solution.
.webp)
According to molecular orbital theory, which of the following is true with respect to $$Li_2^+$$ and $$Li_2^-$$?
Login to view the detailed solution.
0.5 moles of gas A and x moles of gas B exert a pressure of 200 Pa in a container of volume 10 m$$^3$$ at 1000 K. Given, R is the gas constant in JK$$^{-1}$$mol$$^{-1}$$, x is:
Login to view the detailed solution.
Consider the reversible isothermal expansion of an ideal gas in a closed system at two different temperatures $$T_1$$ and $$T_2$$ ($$T_1 < T_2$$). The correct graphical depiction of the dependence of work done $$w$$ vs the final volume $$V$$ is:
Login to view the detailed solution.
.webp)
20 ml of 0.1 M $$H_2SO_4$$ solution is added to 30 mL of 0.2 M $$NH_4OH$$ solution. The pH of the resultant mixture is: ($$pK_b$$ of $$NH_4OH = 4.7$$)
Login to view the detailed solution.
The isotopes of hydrogen are:
Login to view the detailed solution.
The alkaline earth metal nitrate that does not crystallise with molecules is:
Login to view the detailed solution.
.webp)
Correct statements among regarding silicones are:
(a) They are polymers with hydrophobic character.
(b) They are biocompatible.
(c) In general, they have high thermal stability and low dielectric strength.
(d) Usually, they are resistant to oxidation and used as greases.
Login to view the detailed solution.
Arrange the following amines in the decreasing order of basicity.
Login to view the detailed solution.
Which amongst the following is the strongest acid?
Login to view the detailed solution.
.webp)
The compounds A and B in the following reaction are, respectively:
Login to view the detailed solution.
A water sample has ppm level concentration of the following metals: Fe = 0.2; Mn = 5.0; Cu = 3.0; Zn = 5.0. The metal that makes the water sample unsuitable for drinking is:
The one that is extensively used as a piezoelectric material is:
Login to view the detailed solution.
A solution of sodium sulphate contains 92 g of Na$$^+$$ ions per kilogram of water. The molality of Na$$^+$$ ions in that solution in mol kg$$^{-1}$$ is:
Login to view the detailed solution.
Which one of the following statements regarding Henry's law is not correct?
Login to view the detailed solution.
The anodic half-cell of lead-acid battery is recharged using electricity of 0.05 Faraday. The amount of $$PbSO_4$$ electrolyzed in g during the process is: (Molar mass of $$PbSO_4 = 303$$ g mol$$^{-1}$$)
Login to view the detailed solution.
The following results were obtained during kinetic studies of the reaction.
$$2A + B \rightarrow$$ product
Experiment I: A = 0.10 mol L$$^{-1}$$, B = 0.20 mol L$$^{-1}$$, Rate = $$6.93 \times 10^{-3}$$ mol L$$^{-1}$$ min$$^{-1}$$
Experiment II: A = 0.10 mol L$$^{-1}$$, B = 0.25 mol L$$^{-1}$$, Rate = $$6.93 \times 10^{-3}$$ mol L$$^{-1}$$ min$$^{-1}$$
Experiment III: A = 0.20 mol L$$^{-1}$$, B = 0.30 mol L$$^{-1}$$, Rate = $$1.386 \times 10^{-2}$$ mol L$$^{-1}$$ min$$^{-1}$$
The time (in minutes) required to consume half of A is:
Login to view the detailed solution.
Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, $$x$$ is the mass of the gas adsorbed on mass $$m$$ of the adsorbent at pressure P. $$\frac{x}{m}$$ is proportional to:
Login to view the detailed solution.
The ore that contains both iron and copper is:
Login to view the detailed solution.
The major product of the following reaction is:
Login to view the detailed solution.
Two complexes $$[CrH_2O)_6]Cl_3$$ (A) and $$[Cr(NH_3)_6]Cl_3$$ (B) are violet and yellow coloured, respectively. The incorrect statement regarding them is:
Login to view the detailed solution.
In the reaction given below what will be the major product at the end:
Options:
Major product of the given reaction is:
Options:
Login to view the detailed solution.
The highest value of the calculated spin only magnetic moment (in BM) among all the transition metal complexes is:
Login to view the detailed solution.
Acid strength given below the correct decreasing order will be:
Login to view the detailed solution.
Major product of the given below reaction:
Options:
Login to view the detailed solution.
The correct match between column-I and column-II is:
Column-I (drug) Column-II (test)
(A) Chloroxylenol (P) Carbylamine test
(B) Norethindrone (Q) Sodium hydrogen carbonate test
(C) Sulphapyridine (R) Ferric chloride test
(D) Penicillin (S) Baeyer's test
Login to view the detailed solution.
The increasing order of pKa of the following amino acids in aqueous solution is: Glycine, Aspartate, Lysine, Arginine.
Login to view the detailed solution.
Educational materials for JEE preparation
Share