Which among the following is the strongest acid?
Question: Which among the following is the strongest acid?$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH} 3$Correct Option: , 4 Solution:...
Read More →For the first order reaction
Question: For the first order reaction $\mathrm{A} \rightarrow 2 \mathrm{~B}, 1$ mole of reactant A gives $0.2$ moles of B after 100 minutes. The half life of the reaction is ...... min. (Round off to the nearest integer). $[$ Use $: \ln 2=0.69, \ln 10=2.3$ Properties of logarithms : $\ln x^{y}=y \ln x$; $\left.\ln \left(\frac{x}{y}\right)=\ln x-\ln y\right]$ (Round off to the nearest integer) Solution:...
Read More →Given below are two statements : one is labelled as
Question: Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Lithium salts are hydrated. Reason (R) : Lithium has higher polarising power than other alkali metal group members. In the light of the above statements, choose the most appropriate answer from the options given below:Both (A) and (R) are correct but (R) is NOT the correct explanation of (A).(A) is correct but (R) is not correct.(A) is not correct but $(\mathbf{R})$...
Read More →Which one of the following is used to remove most of plutonium from spent nuclear fuel?
Question: Which one of the following is used to remove most of plutonium from spent nuclear fuel?$\mathrm{ClF}_{3}$$\mathrm{O}_{2} \mathrm{~F}_{2}$$\mathrm{I}_{2} \mathrm{O}_{5}$$\mathrm{BrO}_{3}$Correct Option: , 2 Solution: $\mathrm{O}_{2} \mathrm{~F}_{2}$ oxidises plutonium to $\mathrm{PuF}_{6}$ and the reaction is used in removing plutonium as $\mathrm{PuF}_{6}$ from spent nuclear fuel....
Read More →Identify the process
Question: Identify the process in which change in the oxidation state is five :$\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \rightarrow 2 \mathrm{Cr}^{3+}$$\mathrm{MnO}_{4}^{-} \rightarrow \mathrm{Mn}^{2+}$$\mathrm{CrO}_{4}^{2-} \rightarrow \mathrm{Cr}^{3+}$$\mathrm{C}_{2} \mathrm{O}_{4}^{2-} \rightarrow 2 \mathrm{CO}_{2}$Correct Option: , 2 Solution: $\mathrm{MnO}_{4}^{-}+5 \mathrm{e} \rightarrow \mathrm{Mn}^{+2}$...
Read More →he inactivation rate of a viral preparation is proportional
Question: The inactivation rate of a viral preparation is proportional to the amount of virus. In the first minute after preparation, $10 \%$ of the virus is inactivated. The rate constant for viral inactivation is ________ $\times 10^{-3} \mathrm{~min}^{-1} \cdot$ (Nearest integer) $\left[\right.$ Use $: \ln 10=2.303 ; \log _{10} 3=0.477 ;$ property of logarithm: $\left.\log x^{y}=y \log x\right]$ Solution: As the unit of rate constant is $\mathrm{min}^{-1}$ so it must be a first order reaction...
Read More →What is the major product
Question: What is the major product "P" of the following reaction? Correct Option: , 4 Solution:...
Read More →The dihedral angle in staggered form of
Question: The dihedral angle in staggered form of Newman projection of $1,1,1$-Trichloro ethane is___________ degree. (Round off to the nearest integer) Solution: $1,1,1-$ Trichloro ethane $\left[\mathrm{CCl}_{3}-\mathrm{CH}_{3}\right]$ (Newmonns stqqared form)...
Read More →The major product (A) formed in the reaction given below is :
Question: The major product (A) formed in the reaction given below is : Correct Option: , 2 Solution:...
Read More →Spin only magnetic moment in BM of
Question: Spin only magnetic moment in BM of $\left[\mathrm{Fe}(\mathrm{CO})_{4}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right]^{+}$is : $5.92$01$1.73$Correct Option: , 4 Solution: $\left[\mathrm{Fe}(\mathrm{CO})_{4}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right]^{+}$ One unpaired electron Spin only magnetic moment $=\sqrt{3} \mathrm{~B} \cdot \mathrm{M} .=1.73 \mathrm{BM}$...
Read More →In a solvent 50 % of an acid HA dimerizes and the rest dissociates.
Question: In a solvent $50 \%$ of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is________ $\times 10^{-2}$. (Round off to the nearest integer) Solution: $2 \mathrm{HA} \rightleftharpoons \mathrm{H}_{2} \mathrm{~A}_{2} \mathrm{HA} \rightleftharpoons \mathrm{H}^{+}+\mathrm{A}$ Now, $\mathrm{i}=\frac{\text { final moles }}{\text { initial moles }}=\frac{0.25 \mathrm{a}+0.5 \mathrm{a}+0.5 \mathrm{a}}{0.5 \mathrm{a}+0.5 \mathrm{a}}$ $=1.25=125 \times 10^{-2}$...
Read More →Match List I with List II :
Question: Match List I with List II : Choose the most appropriate answer from the options given below(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)Correct Option: , 4 Solution: Cheese $\rightarrow$ liquid in solid Pumice stone $\rightarrow$ gas in solid Hair cream $\rightarrow$ liquid in liquid Cloud $\rightarrow$ liquid in gas...
Read More →To synthesise 1.0 mole of 2 -methylpropan-2-ol from Ethylethanoate
Question: To synthesise $1.0$ mole of 2 -methylpropan-2-ol from Ethylethanoate equivalents of $\mathrm{CH}_{3} \mathrm{MgBr}$ reagent will be required. (Integer value) Solution:...
Read More →Solve this
Question: $\left[\right.$ where $\left.\mathrm{Et} \Rightarrow-\mathrm{C}_{2} \mathrm{H}_{5}{ }^{\mathrm{t}} \mathrm{Bu} \Rightarrow\left(\mathrm{CH}_{3}\right)_{3} \mathrm{C}-\right]$ Consider the above reaction sequence, Product "A" and Product "B" formed respectively are :Correct Option: 1 Solution:...
Read More →3 moles of metal complex with formula
Question: 3 moles of metal complex with formula $\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{3}$ gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of Co in the complex is___________. (Round off to the nearest integer) Solution: $3\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right] \mathrm{C} \ell+\underset{\text { (excess) }}{\mathrm{AgNO}_{3}} \rightarrow \underset{\text { (white ppt.) }}{3 \mathrm{AgCl}}$ Secondary valency of $\mathrm{Co}=6$...
Read More →For the reaction given below:
Question: For the reaction given below: The compound which is not formed as a product in the reaction is a :compound with both alcohol and acid functional groupsmonocarboxylic aciddicarboxylic aciddiolCorrect Option: , 3 Solution:...
Read More →Which one of the following is the major product of the given reaction?
Question: Which one of the following is the major product of the given reaction? Correct Option: 1, Solution:...
Read More →The number of nitrogen atoms in a semicarbazone
Question: The number of nitrogen atoms in a semicarbazone molecule of acetone is _________. Solution: Semicarbazone molecule of acetone...
Read More →The total number of electrons in all bonding molecular
Question: The total number of electrons in all bonding molecular orbitals of $\mathrm{O}_{2}^{2-}$ is.......... (Round off to the nearest integer) Solution: M. O. Configuration of $\mathrm{O}_{2}^{2-}((18 \overline{\mathrm{e}})$ $\sigma 1 s^{2} \sigma 1 s^{2} \sigma 2 s^{2} \sigma 2 s^{2} \sigma 2 p_{z}^{2} \pi 2 p_{x}^{2}=\pi 2 p_{y}^{2}$ $\pi 2 p_{x}^{2}=\pi^{*} 2 p_{y}^{2}$ Total B.M.O electrons $=10$...
Read More →Given below are two statements :
Question: Given below are two statements : Statement I : Chlorofluoro carbons breakdown by radiation in the visible energy region and release chlorine gas in the atmosphere which then reacts with stratospheric ozone. Statement II : Atmospheric ozone reacts with nitric oxide to give nitrogen and oxygen gases, which add to the atmosphere. For the above statements choose the correct answer from the options given below :Statement I is incorrect but statement II is trueBoth statement I and II are fal...
Read More →Solve this following
Question: The deposition of $\mathrm{X}$ and $\mathrm{Y}$ on ground surfaces is referred as wet and dry depositions, respectively. X and $Y$ are :$\mathrm{X}=$ Ammonium salts, $\mathrm{Y}=\mathrm{CO}_{2}$$\mathrm{X}=\mathrm{SO}_{2}, \mathrm{Y}=$ Ammonium salts$\mathrm{X}=$ Ammonium salts, $\mathrm{Y}=\mathrm{SO}_{2}$$\mathrm{X}=\mathrm{CO}_{2}, \mathrm{Y}=\mathrm{SO}_{2}$Correct Option: , 3 Solution: Oxides of nitrogen and sulphur are acidic and settle down on ground as dry deposition. Ammonium ...
Read More →10.0 ml of 0.05 M KMnO4 solution was consumed in
Question: $10.0 \mathrm{~mL}$ of $0.05 \mathrm{M} \mathrm{KMnO}_{4}$ solution was consumed in a titration with $10.0 \mathrm{~mL}$ of given oxalic acid dihydrate solution. The strength of given oxalic acid solution is ........ $\times 10^{-2} \mathrm{~g} / \mathrm{L}$. (Round off to the nearest integer) Solution: $\mathrm{n}_{\mathrm{eq}} \mathrm{KMnO}_{4}=\mathrm{n}_{\mathrm{eq}} \mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4} \cdot 2 \mathrm{H}_{2} \mathrm{O}$ or,$\frac{10 \times 0.05}{1000} \tim...
Read More →2SO_2}(g)+O_2(g)
Question: $2 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_{3}(\mathrm{~g})$ In an equilibrium mixture, the partial pressures are $\mathrm{P}_{\mathrm{SO}_{3}}=43 \mathrm{kPa} ; \mathrm{P}_{\mathrm{O}_{2}}=530 \mathrm{~Pa}$ and $\mathrm{P}_{\mathrm{SO}_{2}}=45 \quad \mathrm{kPa}$. The equilibrium constant $\mathrm{K}_{\mathrm{P}}=$ _________ $\times 10^{-2} \cdot$ (Nearest integer) Solution: $2 \mathrm{SO}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})}=2...
Read More →Which of the following is NOT an example of fibrous protein?
Question: Which of the following is NOT an example of fibrous protein?KeratinAlbuminCollagenMyosinCorrect Option: , 2 Solution: Keratin, collagen and myosin are example of fibrous protein....
Read More →Solve this
Question: Maleic anhydride Maleic anhydride can be prepared by :Heating trans-but-2-enedioic acidHeating cis-but-2-enedioic acidTreating cis-but-2-enedioic acid with alcohol and acidTreating trans-but-2-enedioic acid with alcohol and acidCorrect Option: , 2 Solution: Cis but 2-enoic acid...
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