Solve this following
Question: If $250 \mathrm{~cm}^{3}$ of an aqueous solution containing $0.73 \mathrm{~g}$ of a protein A is isotonic with one litre of another aqueous solution containing $1.65 \mathrm{~g}$ of a protein B, at $298 \mathrm{~K}$, the ratio of the molecular mases of $\mathrm{A}$ and $\mathrm{B}$ is $\times 10^{-2}$ (to the nearest integer). Solution: Let molar mass of protein $\mathrm{A}=\mathrm{x} \mathrm{g} / \mathrm{mol}$ Let molar mass of protein $\mathrm{B}=\mathrm{y} \mathrm{g} / \mathrm{mol}$...
Read More →What are the functional groups present in the structure of maltose ?
Question: What are the functional groups present in the structure of maltose ?One ketal and one hemiketalOne acetal and one hemiacetalTwo acetalsOne acetal and one ketalCorrect Option: , 2 Solution:...
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Question: The volume (in $\mathrm{mL}$ ) of $0.1 \mathrm{~N} \mathrm{NaOH}$ required to neutralise $10 \mathrm{~mL}$ of $0.1 \mathrm{~N}$ phosphinic acid is Solution: $\mathrm{H}_{3} \mathrm{PO}_{2}+\mathrm{NaOH} \rightarrow \mathrm{NaH}_{2} \mathrm{PO}_{2}+\mathrm{H}_{2} \mathrm{O}$ $\frac{\mathrm{n}_{\mathrm{H}_{3} \mathrm{PO}_{2}} \text { reacted }}{1}=\frac{\mathrm{n}_{\mathrm{NaOH}} \text { reacted }}{1}$ $\Rightarrow \frac{0.1 \times 10}{1}=0.1 \times \mathrm{V}_{\mathrm{NaOH}}$ $\Rightarr...
Read More →The intermolecular potential energy for the molecules A, B, C
Question: The intermolecular potential energy for the molecules A, B, C and D given below suggests that : $\mathrm{D}$ is more electronegative than other atomsA-D has the shortest bond lengthA-B has the stiffest bone$\mathrm{A}-\mathrm{A}$ has the largest bond enthalpyCorrect Option: , 3 Solution: From the given graph, potential energy of A-B molecule is minimum. Thus A-B bond is most stable and have strongest bond amongst these. $\mathrm{B} \rightarrow$ Most electronegative $\mathrm{D} \rightar...
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Question: $6.023 \times 10^{22}$ molecules are present in $10 \mathrm{~g}$ of a substance ' $x$ '. The molarity of a solution containing $5 \mathrm{~g}$ of substance ' $\mathrm{x}$ ' in $2 \mathrm{~L}$ solution is $\times 10^{-3}$. Solution: moles $=\frac{\text { number of molecules }}{6 \times 10^{23}}=\frac{\text { given mass }}{\text { molar mass }}$ $\Rightarrow$ molar mas $=\frac{10 \times 6.023 \times 10^{23}}{6.023 \times 10^{22}}=100 \mathrm{~g} / \mathrm{mol}$ $\Rightarrow$ molarity $=\...
Read More →An acidic solution of dichromate is electrolyzed
Question: An acidic solution of dichromate is electrolyzed for 8 minutes using $2 \mathrm{~A}$ current. As per the following equation $\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+14 \mathrm{H}^{+}+6 \mathrm{e}^{-} \rightarrow 2 \mathrm{Cr}^{3+}+7 \mathrm{H}_{2} \mathrm{O}$ The amount of $\mathrm{Cr}^{3+}$ obtained was $0.104 \mathrm{~g}$. The efficiency of the process(in\%) is (Take: $\mathrm{F}=96000 \mathrm{C}$, At. mass of chromium $=52$ ) Solution: Moles of $\mathrm{e}^{\odot}=\left(\frac{8 \times 6...
Read More →The region in the electromagnetic spectrum
Question: The region in the electromagnetic spectrum where the Balmer series lines appear isVisibleMicrowaveUltravioletInfraredCorrect Option: 1 Solution: Balmer series give visible lines For H-atom...
Read More →The ionic radii of
Question: The ionic radii of $\mathrm{O}_{2}{ }^{-}, \mathrm{F}^{-}, \mathrm{Na}^{+}$and $\mathrm{Mg}^{2+}$ are in the order :$\mathrm{F}^{-}\mathrm{O}^{2-}\mathrm{Na}^{+}\mathrm{Mg}^{2+}$$\mathrm{Mg}^{2+}\mathrm{Na}^{+}\mathrm{F}^{-}\mathrm{O}^{2-}$$\mathrm{O}^{2-}\mathrm{F}^{-}\mathrm{Mg}^{2+}\mathrm{Na}^{+}$$\mathrm{O}^{2-}\mathrm{F}^{-}\mathrm{Na}^{+}\mathrm{Mg}^{2+}$Correct Option: , 4 Solution: as $\frac{z}{e}$ ratio increases size decreases. Thus correct ionic radii order is $\mathrm{O}^{...
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Question: Complex A has a composition of $\mathrm{H}_{12} \mathrm{O}_{6} \mathrm{Cl}_{3} \mathrm{Cr}$. If the complex on treatment with conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$ loses $13.5 \%$ of its original mass, the correct molecular formula of $\mathrm{A}$ is : [Given : atomic mass of $\mathrm{Cr}=52 \mathrm{amu}$ and $\mathrm{Cl}=35 \mathrm{amul}$ $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Cl}_{2} \cdot \mathrm{H}_{2} \mathrm{O}$$\left[\mathrm{Cr}\...
Read More →The number of isomers possible for
Question: The number of isomers possible for $\left[\mathrm{Pt}(\mathrm{en})\left(\mathrm{NO}_{2}\right)_{2}\right]$ is :3214Correct Option: 1 Solution: $\left[\mathrm{Pt}(\right.$ en $\left.)\left(\mathrm{NO}_{2}\right)_{2}\right] \Rightarrow$ does not show G.I. as well as optical isomerism. This complex will have three linkage isomers as follows :- [Pt (en) $\left.\left(\mathrm{NO}_{2}\right) 2\right] \mathrm{I}$ [Pt (en) $\left.\left(\mathrm{NO}_{2}\right)(\mathrm{ONO})\right] \mathrm{II}$ $\...
Read More →For the reaction
Question: For the reaction $2 \mathrm{~A}+3 \mathrm{~B}+\frac{3}{2} \mathrm{C} \rightarrow 3 \mathrm{P}$, which statement is correct ?$\frac{\mathrm{dn}_{\mathrm{A}}}{\mathrm{dt}}=\frac{\mathrm{dn}_{\mathrm{B}}}{\mathrm{dt}}=\frac{\mathrm{dn}_{\mathrm{C}}}{\mathrm{dt}}$$\frac{\mathrm{dn}_{\mathrm{A}}}{\mathrm{dt}}=\frac{2}{3} \frac{\mathrm{dn}_{\mathrm{B}}}{\mathrm{dt}}=\frac{3}{4} \frac{\mathrm{dn}_{\mathrm{C}}}{\mathrm{dt}}$$\frac{\mathrm{dn}_{\mathrm{A}}}{\mathrm{dt}}=\frac{3}{2} \frac{\mathr...
Read More →[P] on treatment with Br2/FeBr3 in CCl4 produced a singal isomer
Question: [P] on treatment with $\mathrm{Br}_{2} / \mathrm{FeBr}_{3}$ in $\mathrm{CCl}_{4}$ produced a single isomer $\mathrm{C}_{8} \mathrm{H}_{7} \mathrm{O}_{2} \mathrm{Br}$ while heating [P] with sodalime gave toluene.Correct Option: , 4 Solution:...
Read More →Match the following drugs with their therapeutic actions :
Question: Match the following drugs with their therapeutic actions : (i) Ranitidine (a) Antidepressant (ii) Nardil (Phenelzine) (b) Antibiotic (iii)Chloramphenicol (c) Antihistamine (iv)Dimetane (d) Antacid (Brompheniramine) (e) Analgesic (i)-(a); (ii)-(c); (iii)-(b); (iv)-(e)(i)-(e); (ii)-(a); (iii)-(c); (iv)-(d)$(\mathrm{i})-(\mathrm{d}) ;(\mathrm{ii})-(\mathrm{a}) ;(\mathrm{iii})-(\mathrm{b}) ;(\mathrm{iv})-(\mathrm{c})$(i)-(d); (ii)-(c); (iii)-(a); (iv)-(e)Correct Option: , 3 Solution: Ranit...
Read More →On combustion Li, Na and K in excess of air,
Question: On combustion Li, Na and K in excess of air, the major oxides formed, respectively, are :$\mathrm{Li}_{2} \mathrm{O}, \mathrm{Na}_{2} \mathrm{O}$ and $\mathrm{K}_{2} \mathrm{O}_{2}$$\mathrm{Li}_{2} \mathrm{O}, \mathrm{Na}_{2} \mathrm{O}_{2}$ and $\mathrm{K}_{2} \mathrm{O}$$\mathrm{Li}_{2} \mathrm{O}, \mathrm{Na}_{2} \mathrm{O}_{2}$ and $\mathrm{KO}_{2}$$\mathrm{Li}_{2} \mathrm{O}_{2}, \mathrm{Na}_{2} \mathrm{O}_{2}$ and $\mathrm{K}_{2} \mathrm{O}_{2}$Correct Option: , 3 Solution:...
Read More →The elements with atomic numbers 101 and 104 belong to, respectively :
Question: The elements with atomic numbers 101 and 104 belong to, respectively :Group 11 and Group 4Actinoids and Group 4Actinoids and Group 6Group 6 and ActinoidsCorrect Option: , 2 Solution: Element with atomic no. 101 is an Actinoid element....
Read More →Consider the following reaction :
Question: Consider the following reaction : The product 'P' gives positive ceric ammonium nitrate test. This is because of the presence of which of these $-\mathrm{OH}$ group $(\mathrm{s})$ ? (c) and (d)(b) only(d) only(b) and (d)Correct Option: , 2 Solution: due to pressure of $\mathrm{b}$...
Read More →Match the following :
Question: Match the following : (i)-(b), (ii)-(c), (iii)-(e), (iv)-(d)(i)-(d), (ii)-(b), (iii)-(e), (iv)-(f)(i)-(e), (ii)-(c), (iii)-(a), (iv)-(f)(i)-(d), (ii)-(b), (iii)-(a), (iv)-(e)Correct Option: , 3 Solution: Foam - Froth Gel $\rightarrow$ Jellies Aerosol $\rightarrow$ Smoke Sol $\rightarrow$ Cell fluids Solid sol $\rightarrow$ rubber...
Read More →An organic compound (A) (molecular formula C6H12O2) was hydrolysed with dil.
Question: An organic compound (A) (molecular formula $\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{2}$ ) was hydrolysed with dil. $\mathrm{H}_{2} \mathrm{SO}_{4}$ to give a carboxylic acid (B) and an alcohol (C). ${ }^{\prime} \mathrm{C}^{\prime}$ give white turbidity immediately when treated with anhydrous $\mathrm{ZnCl}_{2}$ and conc. $\mathrm{HCl}$. The organic compound (A) is :Correct Option: 1 Solution:...
Read More →Consider the following molecules and statements related to them :
Question: Consider the following molecules and statements related to them : (a) (B) is more likely to be crystalline than (A) (b) (B) has higher boiling point than (A) (c) (B) dissolves more readily than (A) in water Identify the correct option from below : only (a) is true(a) and (c) are true(b) and (c) are true(a) and (b) are trueCorrect Option: , 3 Solution: (a) B will be more crystalline due to more inter molecular interactions hence more efficient packing. (b) B will have higher boiling poi...
Read More →The compound A in the following reaction is :
Question: The compound $\mathrm{A}$ in the following reaction is : Correct Option: , 3 Solution:...
Read More →The incorrect statement is :
Question: The incorrect statement is : In manganate and permanganate ions, the $\pi$-bonding takes place by overlap of p-orbitals of oxygen and d-orbitals of manganeseManganate ion is green in colour and permanganate ion in purple in colourManganate and permanganate ions are paramagneticManganate and permanganate ions are tetrahedralCorrect Option: 3, Solution: Option 1) Manganate $\Rightarrow \mathrm{MnO}_{4}^{2-}$, Permanganate $\Rightarrow \mathrm{MnO}_{4}^{-}$ After excitation $2 \times 2 \m...
Read More →The decreasing order of reactivity of the following organic molecules
Question: The decreasing order of reactivity of the following organic molecules towards $\mathrm{AgNO}_{3}$ solution is : $(\mathrm{A})(\mathrm{B})(\mathrm{D})(\mathrm{C})$$(\mathrm{A})(\mathrm{B})(\mathrm{C})(\mathrm{D})$$(\mathrm{C})(\mathrm{D})(\mathrm{A})(\mathrm{B})$$(\mathrm{B})(\mathrm{A})(\mathrm{C})(\mathrm{D})$Correct Option: , 4 Solution:...
Read More →The increasing order of the reactivity of the following compound in nucleophilic addition reaction is :
Question: The increasing order of the reactivity of the following compound in nucleophilic addition reaction is : Propanal, Benzaldehyde, Propanone, Butanone Butanone $$ Propanone $$ Benzaldehyde $$ PropanalBenzaldehyde $$ Butanone $$ Propanone $$ PropanalPropanal Propanone Butanone BenzaldehydeBenzaldehyde $$ Propanal $$ Propanone $$ ButanoneCorrect Option: 1 Solution: Reactivity order of various carbonyl compounds $\rightarrow$ Aldehydes $$ Ketones...
Read More →For the equilibrium A ⇌ B,
Question: For the equilibrium $\mathrm{A} \rightleftharpoons \mathrm{B}$, the variation of the rate of the forward (a) and reverse (b) reaction with time is given byCorrect Option: , 3 Solution: at equilibrium $r_{a}=r_{b}$...
Read More →The major product in the following reaction is :
Question: The major product in the following reaction is : Correct Option: , 4 Solution:...
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