The correct sequence of electron gain enthalpy of the elements listed below is A. Ar B. Br C. F D. S. Choose the most appropriate from the options given below:
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.
The correct sequence of electron gain enthalpy of the elements listed below is A. Ar B. Br C. F D. S. Choose the most appropriate from the options given below:
Login to view the detailed solution.
The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have the same energy B. have the minimum overlap C. have same symmetry about the molecular axis D. have different symmetry about the molecular axis. Choose the most appropriate from the options given below:
Login to view the detailed solution.
For the given reaction, choose the correct expression of $$K_C$$ from the following: $$\text{Fe}^{3+}_{(aq)} + \text{SCN}^-_{(aq)} \rightleftharpoons (\text{FeSCN})^{2+}_{(aq)}$$
Login to view the detailed solution.
.webp)
Consider the oxides of group 14 elements $$SiO_2, GeO_2, SnO_2, PbO_2, CO$$ and $$GeO$$. The amphoteric oxides are
Login to view the detailed solution.
A species having carbon with sextet of electrons and can act as electrophile is called
Login to view the detailed solution.
'Adsorption' principle is used for which of the following purification method?
Login to view the detailed solution.
.webp)
Given below are two statements: Statement I: IUPAC name of $$HO - CH_2 - (CH_2)_3 - CH_2 - COCH_3$$ is 7-hydroxyheptan-2-one. Statement II: 2-oxoheptan-7-ol is the correct IUPAC name for the above compound. In the light of the above statements, Choose the most appropriate answer from the options given below:
Login to view the detailed solution.
Match List I with List II:
Choose the correct answer from the options given below:
Login to view the detailed solution.
The product (C) in the below mentioned reaction is: $$CH_3-CH_2-CH_2-Br \xrightarrow[\Delta]{KOH_{alc}} A \xrightarrow{HBr} B \xrightarrow[\Delta]{KOH_{aq}} C$$
Login to view the detailed solution.
.webp)
Identify the mixture that shows positive deviations from Raoult's Law
Login to view the detailed solution.
The metals that are employed in the battery industries are A. Fe, B. Mn, C. Ni, D. Cr, E. Cd. Choose the correct answer from the options given below:
Login to view the detailed solution.
Identify the factor from the following that does not affect electrolytic conductance of a solution.
Login to view the detailed solution.
.webp)
Integrated rate law equation for a first order gas phase reaction is given by (where $$P_i$$ is initial pressure and $$P_t$$ is total pressure at time $$t$$)
Login to view the detailed solution.
Give below are two statements:
Statement-I: Noble gases have very high boiling points.
Statement-II: Noble gases are monoatomic gases. They are held together by strong dispersion forces. Because of this they are liquefied at very low temperature. Hence, they have very high boiling points.
In the light of the above statements, choose the correct answer from the options given below:
Login to view the detailed solution.
Identify correct statements from below:
A. The chromate ion is square planar.
B. Dichromates are generally prepared from chromates.
C. The green manganate ion is diamagnetic.
D. Dark green coloured $$K_2MnO_4$$ disproportionates in a neutral or acidic medium to give permanganate.
E. With increasing oxidation number of transition metal, ionic character of the oxides decreases.
Choose the correct answer from the options given below:
Login to view the detailed solution.
The correct statements from the following are:
A. The strength of anionic ligands can be explained by crystal field theory.
B. Valence bond theory does not give a quantitative interpretation of kinetic stability of coordination compounds.
C. The hybridization involved in formation of $$[Ni(CN)_4]^{2-}$$ complex is $$dsp^2$$.
D. The number of possible isomer(s) of cis-$$[PtCl_2(en)_2]^{2+}$$ is one.
Choose the correct answer from the options given below:
Login to view the detailed solution.
Given below are two statements:
Assertion A: $$pK_a$$ value of phenol is $$10.0$$ while that of ethanol is $$15.9$$.
Reason R: Ethanol is stronger acid than phenol.
In the light of the above statements, choose the correct answer from the options given below:
Login to view the detailed solution.
Given below are two statements:
Assertion A: Alcohols react both as nucleophiles and electrophiles.
Reason R: Alcohols react with active metals such as sodium, potassium and aluminum to yield corresponding alkoxides and liberate hydrogen.
In the light of the above statements, choose the correct answer from the options given below:
Login to view the detailed solution.
The compound that is white in color is
Login to view the detailed solution.
Match List I with List II:
Choose the correct answer from the options given below:
Number of moles of methane required to produce $$22$$ g $$CO_{2(g)}$$ after combustion is $$x \times 10^{-2}$$ moles. The value of $$x$$ is
Login to view the detailed solution.
The ionization energy of sodium in $$kJ \text{ mol}^{-1}$$, if electromagnetic radiation of wavelength $$242$$ nm is just sufficient to ionize sodium atom is ______. (nearest integer)
Login to view the detailed solution.
The number of species from the following in which the central atom uses $$sp^3$$ hybrid orbitals in its bonding is _________. $$NH_3, SO_2, SiO_2, BeCl_2, CO_2, H_2O, CH_4, BF_3$$
Login to view the detailed solution.
Consider the following reaction at 298 K. $$\frac{3}{2}O_{2(g)} \rightleftharpoons O_{3(g)}$$, $$K_p = 2.47 \times 10^{-29}$$. $$\Delta_r G^0$$ for the reaction is _________ kJ. (Given $$R = 8.314 \text{ JK}^{-1}\text{mol}^{-1}$$) Round off your answer to the nearest integer.
Login to view the detailed solution.
Number of alkanes obtained on electrolysis of a mixture of $$CH_3COONa$$ and $$C_2H_5COONa$$ is _____.
Login to view the detailed solution.
One Faraday of electricity liberates $$x \times 10^{-1}$$ gram atom of copper from copper sulphate, $$x$$ is ______.
Login to view the detailed solution.
The 'Spin only' Magnetic moment for $$[Ni(NH_3)_6]^{2+}$$ is ______ $$\times 10^{-1}$$ BM. (given = Atomic number of Ni : 28) Round off your answer to the nearest integer.
Login to view the detailed solution.
The total number of hydrogen atoms in product A and product B is __________.
Login to view the detailed solution.
The number of hydroxyl groups present in the product $$P$$ is __________.
Login to view the detailed solution.
Molar mass of the salt from $$NaBr, NaNO_3, KI$$ and $$CaF_2$$ which does not evolve coloured vapours on heating with concentrated $$H_2SO_4$$ is ____ g mol$$^{-1}$$. (Molar mass in g mol$$^{-1}$$: Na: 23, N: 14, K: 39, O: 16, Br: 80, I: 127, F: 19, Ca: 40)
Login to view the detailed solution.
Educational materials for JEE preparation
Share