The third ionization enthalpy is minimum for:
Question: The third ionization enthalpy is minimum for:$\mathrm{Fe}$$\mathrm{Ni}$$\mathrm{Co}$$\mathrm{Mn}$Correct Option: 1 Solution:...
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Question: The IUPAC name of the complex $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}\left(\mathrm{NH}_{2} \mathrm{CH}_{3}\right)\right] \mathrm{Cl}$ is :Diammine (methanamine) chlorido platinum (II) chlorideBisammine (methanamine) chlorido platinum (II) chlorideDiamminechlorido (aminomethane) platinum(II) chlorideDiamminechlorido (methanamine) platinum (II) chlorideCorrect Option: , 4 Solution: Diamminechlorido (methanamine) platinum (II) chloride...
Read More →The most suitable reagent for the given conversion is :
Question: The most suitable reagent for the given conversion is : $\mathrm{LiAlH}_{4}$$\mathrm{NaBH}_{4}$$\mathrm{H}_{2} / \mathrm{Pd}$$\mathrm{B}_{2} \mathrm{H}_{6}$Correct Option: , 4 Solution:...
Read More →The theory that can completely/properly explain the nature of bonding in
Question: The theory that can completely/properly explain the nature of bonding in $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ is:Werner's theoryCrystal field theoryValence bond theoryMolecular orbital theoryCorrect Option: , 4 Solution: In complex $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ decrease in $\mathrm{Ni}-\mathrm{C}$ bond length and increase in $\mathrm{C}-\mathrm{O}$ bond length as well as it's magnetic property is explained by MOT....
Read More →The first ionization energy
Question: The first ionization energy (in $\mathrm{kJ} / \mathrm{mol}$ ) of $\mathrm{Na}$, $\mathrm{Mg}, \mathrm{Al}$ and $\mathrm{Si}$ respectively, are :$496,737,577,786$$786,737,577,496$$496,577,737,786$$496,577,786,737$Correct Option: 1 Solution:...
Read More →Chlorine reacts with hot and concentrated
Question: Chlorine reacts with hot and concentrated $\mathrm{NaOH}$ and produces compounds (X) and (Y). Compound (X) gives white precipitate with silver nitrate solution. The average bond order between $\mathrm{Cl}$ and $\mathrm{O}$ atoms in (Y) is Solution:...
Read More →A flask contains a mixture of isohexane and
Question: A flask contains a mixture of isohexane and $3-$ methylpentane. One of the liquids boils at $63^{\circ} \mathrm{C}$ while the other boils at $60^{\circ} \mathrm{C}$. What is the best way to seprate the two liquids and which one will be distilled out first?simple distillation, 3 -methylpentanesimple distillation, isohexanefractional distillation, isohexanefractional distillation, 3-methylpentaneCorrect Option: , 3 Solution: Liquid which have less difference in boiling point can be isola...
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Question: Two solutions $\mathrm{A}$ and $\mathrm{B}$, each of $100 \mathrm{~L}$ was made by dissolving $4 \mathrm{~g}$ of $\mathrm{NaOH}$ and $9.8 \mathrm{~g}$ of $\mathrm{H}_{2} \mathrm{SO}_{4}$ in water, respectively. The $\mathrm{pH}$ of the resultant solution obtained from mixing $40 \mathrm{~L}$ of solution $\mathrm{A}$ and $10 \mathrm{~L}$ of solution B is Solution:...
Read More →The number of chiral carbons in chloramphenicol is
Question: The number of chiral carbons in chloramphenicol is Solution:...
Read More →During the nuclear explosion, one of the products is
Question: During the nuclear explosion, one of the products is ${ }^{90} \mathrm{Sr}$ with half life of $6.93$ years. if $1 \mu \mathrm{g}$ of ${ }^{90} \mathrm{Sr}$ was absorbed in the bones of a newly born baby in place of $\mathrm{Ca}$, how much time, in years, is required to reduce it by $90 \%$ if it is not lost metabolically Solution:...
Read More →For the reaction ;
Question: For the reaction ; $\mathrm{A}(l) \rightarrow 2 \mathrm{~B}(\mathrm{~g})$ $\Delta \mathrm{U}=2.1 \mathrm{kcal}, \Delta \mathrm{S}=20 \mathrm{cal} \mathrm{} \mathrm{K}^{-1}$ at $300 \mathrm{~K}$ Hence $\Delta \mathrm{G}$ in kcal is___________ Solution:...
Read More →Oxidation number of potassium in
Question: Oxidation number of potassium in $\mathrm{K}_{2} \mathrm{O}, \mathrm{K}_{2} \mathrm{O}_{2}$ and $\mathrm{KO}_{2}$, respectively, is :$+1,+4$ and $+2$$+1,+2$ and $+4$$+1,+1$ and $+1$$+2,+1$ and $+\frac{1}{2}$Correct Option: , 3 Solution: Potasisum has an oxidation of $+1$ (only) in combined state....
Read More →Consider the following reaction :
Question: Consider the following reaction : The product ' $X^{\prime}$ is used :in acid base titration as an indicatorin protein estimation as an alternative to ninhydrinin laboratory test for phenolsas food grade colourantCorrect Option: 1 Solution:...
Read More →Match the following :
Question: Match the following : (i)-(c), (ii)-(a), (iii)-(d), (iv)-(b)(i)-(c), (ii)-(d), (iii)-(a), (iv)-(b)(i)-(d), (ii)-(b), (iii)-(a), (iv)-(c)(i)-(a), (ii)-(d), (iii)-(c), (iv)-(b)Correct Option: 1 Solution:...
Read More →The number of orbitals associated with quantum
Question: The number of orbitals associated with quantum numbers $\mathrm{n}=5, \mathrm{~m}_{\mathrm{s}}=+\frac{1}{2}$ is :11251550Correct Option: , 2 Solution: electrons having $\mathrm{m}_{\mathrm{s}}=\frac{1}{2}$...
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Question: The electron gain enthalpy (in $\mathrm{kJ} / \mathrm{mol}$ ) of fluorine, chlorine, bromine and iodine, respectively are:$-333,-349,-325$ and $-296$$-296,-325,-333$ and $-349$$-333,-325,-349$ and $-296$$-349,-333,-325$ and $-296$Correct Option: 1 Solution: Order of electron gain enthalpy (magnitude) is $\mathrm{Cl}\mathrm{F}\mathrm{Br}\mathrm{I}$...
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Question: At $35^{\circ} \mathrm{C}$, the vapour pressure of $\mathrm{CS}_{2}$ is $512 \mathrm{~mm}$ $\mathrm{Hg}$ and that of acetone is $344 \mathrm{~mm} \mathrm{Hg} . \mathrm{A}$ solution of $\mathrm{CS}_{2}$ in acetone has a total vapour pressure of $600 \mathrm{~mm} \mathrm{Hg}$. The false statement amongst the following is :heat must be absorbed in order to produce the solution at $35^{\circ} \mathrm{C}$Raoult's law is not obeyed by this systema mixture of $100 \mathrm{~mL} \mathrm{} \math...
Read More →The pair that has similar atomic radii is
Question: The pair that has similar atomic radii is$\mathrm{Sc}$ and $\mathrm{Ni}$$\mathrm{Ti}$ and $\mathrm{HF}$Mo and WMn and ReCorrect Option: , 3 Solution: Mo and W has nearly similar atomic radius due to lanthanoid contraction....
Read More →The INCORRECT statement is :
Question: The INCORRECT statement is :Lithium is least reactive with water among the alkali metals.LiCl crystallises from aqueous solution as $\mathrm{LiCl} .2 \mathrm{H}_{2} \mathrm{O}$.Lithium is the strongest reducing agent among the alkali metals.$\mathrm{LiNO}_{3}$ decomposes on heating to give $\mathrm{LiNO}_{2}$ and $\mathrm{O}_{2}$.Correct Option: , 4 Solution: (4) $2 \mathrm{LiNO}_{3} \stackrel{\Delta}{\longrightarrow} \mathrm{Li}_{2} \mathrm{O}+2 \mathrm{NO}_{2}(\mathrm{~g})+\frac{1}{2...
Read More →The purest form of commercial iron is
Question: The purest form of commercial iron is scrap iron and pig ironwrought ironcast ironpig ironCorrect Option: , 2 Solution: Wrought iron is purest from of commercial iron....
Read More →Consider the following reactions:
Question: Consider the following reactions: Which of these reaction(s) will not produce Saytzeff product? (c) only$(a),(c)$ and $(d)$(d) only(b) and (d)Correct Option: 1 Solution: $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{O}^{-} \mathrm{K}^{+}$is incorrect representation of potassium tert-butoxide $\left[\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CO}^{-} \mathrm{K}^{+}\right]$. So it is possible that it can be given as Bonus...
Read More →The decreasing order of electrical conductivity
Question: The decreasing order of electrical conductivity of the following aqueous solutions is : $0.1 \mathrm{M}$ Formic acid (A), $0.1$ M Acetic acid (B) $0.1$ M Benzoic acid $(\mathrm{C})$$\mathrm{C}\mathrm{B}\mathrm{A}$$\mathrm{A}\mathrm{B}\mathrm{C}$$\mathrm{A}\mathrm{C}\mathrm{B}$$\mathrm{C}\mathrm{A}\mathrm{B}$Correct Option: , 3 Solution:...
Read More →Benzene diazonium chloride on reaction with
Question: Benzene diazonium chloride on reaction with aniline in the presence of dilute hydrochloric acid gives :Correct Option: , 3 Solution:...
Read More →In which one of the following equilibria,
Question: In which one of the following equilibria, $\mathrm{K}_{\mathrm{p}} \neq \mathrm{K}_{\mathrm{c}}$ ?$\mathrm{NO}_{2}(\mathrm{~g})+\mathrm{SO}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{NO}(\mathrm{g})+\mathrm{SO}_{3}(\mathrm{~g})$$2 \mathrm{HI}(\mathrm{g}) \rightleftharpoons \mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g})$$2 \mathrm{NO}(\mathrm{g}) \rightleftharpoons \mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g})$$2 \mathrm{C}(\mathrm{s})+\mathrm{O}_{2}(\mathrm{~g}) \ri...
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Question: The relative strength of interionic/ intermolecular forces in decreasing order is :ion-dipole $$ ion-ion $$ dipole-dipoledipole-dipole ion-dipole ion-ionion-dipole $$ dipole-dipole $$ ion-ionion-ion ion-dipole $$ dipole-dipoleCorrect Option: , 4 Solution: Order is ion $-$ ion $$ ion $-$ dipole $$ dipole $-$ dipole...
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