Given :
Question: Given : $\mathrm{Co}^{3+}+\mathrm{e}^{-} \rightarrow \mathrm{Co}^{2+} ; \mathrm{E}^{\circ}=+1.81 \mathrm{~V}$ $\mathrm{~Pb}^{4+}+2 \mathrm{e}-\mathrm{Pb}^{2+} ; \mathrm{E}^{\circ}=+1.67 \mathrm{~V}$ $\mathrm{Ce}^{4+}+\mathrm{e}^{-} \rightarrow \mathrm{Ce}^{3+} ; \mathrm{E}^{\circ}=+1.61 \mathrm{~V}$ $\mathrm{Bi}^{3+}+3 \mathrm{e}^{-} \rightarrow \mathrm{Bi} ; \mathrm{E}^{\circ}=+0.20 \mathrm{~V}$ Oxidizing power of the species will increase in the order :$\mathrm{Ce}^{4+}\mathrm{Pb}^{4...
Read More →Peptization is a :
Question: Peptization is a :process of converting a colloidal solution into precipitateprocess of converting precipitate into colloidal solutionprocess of converting soluble particles to form colloidal solutionprocess of bringing colloidal molecule into solutionCorrect Option: , 2 Solution: process of converting precipitate into colloidal solution...
Read More →Solve this following
Question: A hydrated solid $X$ on heating initially gives a monohydrated compound $Y$. Y upon heating above $373 \mathrm{~K}$ leads to an anhydrous white powder $\mathrm{Z} . \mathrm{X}$ and $\mathrm{Z}$, respectively, are:Washing soda and soda ash.Washing soda and dead burnt plaster.Baking soda and dead burnt plaster.Baking soda and soda ash.Correct Option: 1 Solution:...
Read More →The correct statement among the following is
Question: The correct statement among the following is$\left(\mathrm{SiH}_{3}\right)_{3} \mathrm{~N}$ is pyramidal and more basic than $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$$\left(\mathrm{SiH}_{3}\right)_{3} \mathrm{~N}$ is planar and more basic than $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$$\left(\mathrm{SiH}_{3}\right)_{3} \mathrm{~N}$ is pyramidal and less basic than $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$$\left(\mathrm{SiH}_{3}\right)_{3} \mathrm{~N}$ is planar and less b...
Read More →The increasing order of nucleophilicity of the following nucleophiles is:
Question: The increasing order of nucleophilicity of the following nucleophiles is: (a) $\mathrm{CH}_{3} \mathrm{CO}_{2}^{\ominus}$ (b) $\mathrm{H}_{2} \mathrm{O}$ (c) $\mathrm{CH}_{3} \mathrm{SO}_{3}^{\ominus}$ (d) $\stackrel{\ominus}{\mathrm{O} H}$(b) $(\mathrm{c})(\mathrm{a})(\mathrm{d})$$(a)(d)(c)(b)$$(d)(a)(c)(b)$$(b)(c)(d)(a)$Correct Option: 1 Solution:...
Read More →The correct sequence of thermal stability
Question: The correct sequence of thermal stability of the following carbonates is$\mathrm{BaCO}_{3}\mathrm{CaCO}_{3}\mathrm{SrCO}_{3}\mathrm{MgCO}_{3}$$\mathrm{MgCO}_{3}\mathrm{CaCO}_{3}\mathrm{SrCO}_{3}\mathrm{BaCO}_{3}$$\mathrm{BaCO}_{3}\mathrm{SrCO}_{3}\mathrm{CaCO}_{3}\mathrm{MgCO}_{3}$$\mathrm{MgCO}_{3}\mathrm{SrCO}_{3}\mathrm{CaCO}_{3}\mathrm{BaCO}_{3}$Correct Option: , 2 Solution: Thermal stability of Alkaline earth metals carbonates increases down the group. because down the group polar...
Read More →But-2-ene on reaction with alkaline
Question: But-2-ene on reaction with alkaline $\mathrm{KMnO}_{4}$ at elevated temperature followed by acidification will give :one molecule of $\mathrm{CH}_{3} \mathrm{CHO}$ and one molecule of $\mathrm{CH}_{3} \mathrm{COOH}$2 molecules of $\mathrm{CH}_{3} \mathrm{COOH}$2 molecules of $\mathrm{CH}_{3} \mathrm{CHO}$Correct Option: , 3 Solution:...
Read More →The correct statements among (a) to (b) are:
Question: The correct statements among (a) to (b) are:. (a) saline hydrides produce $\mathrm{H}_{2}$ gas when reacted with $\mathrm{H}_{2} \mathrm{O}$. (b) reaction of $\mathrm{LiAH}_{4}$ with $\mathrm{BF}_{3}$ leads to $\mathrm{B}_{2} \mathrm{H}_{6}$. (c) $\mathrm{PH}_{3}$ and $\mathrm{CH}_{4}$ are electron - rich and electronprecise hydrides, respectively. (d) $\mathrm{HF}$ and $\mathrm{CH}_{4}$ are called as molecular hydrides.(c) and (d) only(a), (b) and (c) only(a), (b), (c) and (d)(a), (c)...
Read More →What is the molar solubility of
Question: What is the molar solubility of $\mathrm{Al}(\mathrm{OH})_{3}$ in $0.2 \mathrm{M} \mathrm{NaOH}$ solution ? Given that, solubility product of $\mathrm{Al}(\mathrm{OH})_{3}=2.4 \times 10^{-24}$ :$12 \times 10^{-23}$$12 \times 10^{-21}$$3 \times 10^{-19}$$3 \times 10^{-22}$Correct Option: , 4 Solution:...
Read More →Solve this following
Question: For the reaction of $\mathrm{H}_{2}$ with $\mathrm{I}_{2}$, the rate constant is $2.5 \times 10^{-4} \mathrm{dm}^{3} \mathrm{~mol}^{-1} \mathrm{~s}^{-1}$ at $327^{\circ} \mathrm{C}$ and $1.0 \mathrm{dm}^{3} \mathrm{~mol}^{-1} \mathrm{~s}^{-1}$ at $527^{\circ} \mathrm{C}$. The activation energy for the reaction, in $\mathrm{kJ} \mathrm{mol}^{-1}$ is: $\left(\mathrm{R}=8.314 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)$7216615059Correct Option: , 2 Solution:...
Read More →The major product of the following addition reaction is :
Question: The major product of the following addition reaction is : $\mathrm{H}_{3} \mathrm{C}-\mathrm{CH}=\mathrm{CH}_{2} \stackrel{\mathrm{Cl}_{2} / \mathrm{H}_{2} \mathrm{O}}{\longrightarrow}$Correct Option: , 2 Solution:...
Read More →The difference between
Question: The difference between $\Delta \mathrm{H}$ and $\Delta \mathrm{U}(\Delta \mathrm{H}-\Delta \mathrm{U})$, when the combustion of one mole of heptane (1) is carried out at a temperature $T$, is equal to:3RT$-3 \mathrm{RT}$$-4 R T$4RTCorrect Option: , 3 Solution:...
Read More →5 moles of AB2 weigh
Question: 5 moles of $\mathrm{AB}_{2}$ weigh $125 \times 10^{-3} \mathrm{~kg}$ and 10 moles of $\mathrm{A}_{2} \mathrm{~B}_{2}$ weigh $300 \times 10^{-3} \mathrm{~kg}$. The molar mass of $\mathrm{A}\left(\mathrm{M}_{\mathrm{A}}\right)$ and molar mass of $\mathrm{B}\left(\mathrm{M}_{\mathrm{B}}\right)$ in $\mathrm{kg} \mathrm{mol}^{-1}$ are :$\mathrm{M}_{\mathrm{A}}=50 \times 10^{-3}$ and $\mathrm{M}_{\mathrm{B}}=25 \times 10^{-3}$$\mathrm{M}_{\mathrm{A}}=25 \times 10^{-3}$ and $\mathrm{M}_{\math...
Read More →Which of these factors does not govern the stability of a conformation in acyclic compounds ?
Question: Which of these factors does not govern the stability of a conformation in acyclic compounds ?Torsional strainAngle strainSteric interactionsElectrostatic forces of interactionCorrect Option: , 2 Solution: in acyclic compounds angle strain does not govern the stability of a conformation....
Read More →Which of these factors does not govern the stability of a conformation in acyclic compounds ?
Question: Which of these factors does not govern the stability of a conformation in acyclic compounds ?Torsional strainAngle strainSteric interactionsElectrostatic forces of interactionCorrect Option: , 2 Solution: in acyclic compounds angle strain does not govern the stability of a conformation....
Read More →Which of the following is NOT a correct method of the preparation
Question: Which of the following is NOT a correct method of the preparation of benzylamine from cyanobenzene? (i) $\mathrm{HCl} / \mathrm{H}_{2} \mathrm{O}$ (ii) $\mathrm{NaBH}_{4}$(i) $\mathrm{LiAIH}_{4}$ (ii) $\mathrm{H}_{3} \mathrm{O}^{+}$(i) $\mathrm{SnCl}_{2}+\mathrm{HCl}($ gas $)$ (ii) $\mathrm{NaBH}_{4}$$\mathrm{H}_{2} / \mathrm{Ni}$Correct Option: 1 Solution:...
Read More →The correct match between Item-I and Item-II is:
Question: The correct match between Item-I and Item-II is: $(\mathrm{a}) \rightarrow(\mathrm{III}),(\mathrm{b}) \rightarrow(\mathrm{I}),(\mathrm{c}) \rightarrow(\mathrm{II}),(\mathrm{d}) \rightarrow(\mathrm{IV})$$(\mathrm{a}) \rightarrow(\mathrm{IV}),(\mathrm{b}) \rightarrow(\mathrm{II}),(\mathrm{c}) \rightarrow(\mathrm{I}),(\mathrm{d}) \rightarrow(\mathrm{III})$(a) $\rightarrow(\mathrm{II}),(\mathrm{b}) \rightarrow(\mathrm{IV}),(\mathrm{c}) \rightarrow(\mathrm{I}),(\mathrm{d}) \rightarrow(\math...
Read More →The maximum possible denticities of a ligand given
Question: The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are : 6 and 88 and 68 and 86 and 6Correct Option: 1 Solution: Towards common transition element and inner transition metal ion given ligand can have maximum denticities of 6 and 8 respectively....
Read More →p-Hydroxybenzophenone upon reaction with bromine
Question: p-Hydroxybenzophenone upon reaction with bromine in carbon tetrachloride gives:Correct Option: , 4 Solution:...
Read More →In an acid-base titration,
Question: In an acid-base titration, $0.1 \mathrm{M} \mathrm{HCl}$ solution was added to the $\mathrm{NaOH}$ solution of unknown strength. Which of the following correctly shows the change of $\mathrm{pH}$ of the titraction mixture in this experiment? (A)(C)(D)(B)Correct Option: 1 Solution:...
Read More →The correct statements among I to III are :
Question: The correct statements among I to III are : (I) Valence bond theory cannot explain the color exhibited by transition metal complexes. (II) Valence bond theory can predict quantitatively the magnetic properties of transtition metal complexes. (III) Valence bond theory cannot distinguish ligands as weak and strong field ones.(I) and (II) only(I), (II) and (III)(I) and (III) only(II) and (III) onlyCorrect Option: , 3 Solution: Based on NCERT, statement of limitations of VBT, I \ III are c...
Read More →The alloy used in the construction of aircrafts is :-
Question: The alloy used in the construction of aircrafts is :- $\mathrm{Mg}-\mathrm{Sn}$$\mathrm{Mg}-\mathrm{Mn}$$\mathrm{Mg}-\mathrm{Al}$$\mathrm{Mg}-\mathrm{Zn}$Correct Option: , 3 Solution: $\mathrm{Mg}-\mathrm{Al}$ alloy is used for construction of aircrafts....
Read More →Which of the following compounds is a constituent
Question: Which of the following compounds is a constituent of the polymer FormaldehydeAmmoniaMethylamineN-Methyl ureaCorrect Option: 1 Solution:...
Read More →The regions of the atmosphere, where clouds form and where we line respectively, are :-
Question: The regions of the atmosphere, where clouds form and where we line respectively, are :-Stratosphere and TroposphereTroposphere and StratosphereTroposphere and TroposphereStratosphere and StratosphereCorrect Option: , 3 Solution: Troposphere is the lowest region of atmosphere bounded by Earth beneath and the stratosphere above where most of the clouds form and where life form exists....
Read More →What would be the molality of
Question: What would be the molality of $20 \%$ (mass/ mass) aqueous solution of KI? (molar mass of KI $=166 \mathrm{~g} \mathrm{~mol}^{-1}$ )$1.08$$1.48$$1.51$$1.35$Correct Option: , 3 Solution:...
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