The major product of the following reaction is :
Question: The major product of the following reaction is : Correct Option: , 4 Solution:...
Read More →Among the colloids cheese (C), milk (M) and smoke (S),
Question: Among the colloids cheese (C), milk (M) and smoke (S), the correct combination of the dispersed phase and dispersion medium, respectively is :-C : solid in liquid; M : solid in liquid; $S$ : solid in gasC : solid in liquid; $M$ : liquid in liquid; S: gas in solidC : liquid in solid; M : liquid in solid; $S$ : solid in gasC : liquid in solid; M : liquid in liquid; $S$ : solid in gasCorrect Option: , 4 Solution:...
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Question: Decomposition of $X$ exhibits a rate constant of $0.05$ $\mu \mathrm{g} /$ year. How many years are required for the decomposition of $5 \mu \mathrm{g}$ of $\mathrm{X}$ into $2.5 \mu \mathrm{g}$ ?50252040Correct Option: 1 Solution:...
Read More →The radius of the largest sphere which fits properly at
Question: The radius of the largest sphere which fits properly at the centre of the edge of body centred cubic unit cell is : (Edge length is represented by 'a') :-$0.134 \mathrm{a}$$0.027 \mathrm{a}$$0.067 \mathrm{a}$$0.047 \mathrm{a}$Correct Option: , 3 Solution:...
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Question: The element with $\mathrm{Z}=120$ (not yet discovered) will be an/a : transition metalinner-transition metalalkaline earth metalalkali metalCorrect Option: , 3 Solution:...
Read More →The correct match between item I and item II is :-
Question: The correct match between item I and item II is :- (A) $\rightarrow(\mathrm{P}) ;(\mathrm{B}) \rightarrow(\mathrm{R}) ;(\mathrm{C}) \rightarrow(\mathrm{S}) ;$ (D) $\rightarrow(\mathrm{Q})$$(\mathrm{A}) \rightarrow(\mathrm{R}) ;(\mathrm{B}) \rightarrow(\mathrm{P}) ;(\mathrm{C}) \rightarrow(\mathrm{S}) ;(\mathrm{D}) \rightarrow(\mathrm{Q})$$(\mathrm{A}) \rightarrow(\mathrm{P}) ;(\mathrm{B}) \rightarrow(\mathrm{R}) ;(\mathrm{C}) \rightarrow(\mathrm{Q}) ;$ (D) $\rightarrow$ (S)$(\mathrm{A}...
Read More →The volume of gas A is twice than that of gas B.
Question: The volume of gas A is twice than that of gas B. The compressibility factor of gas A is thrice than that of gas B at same temperature. The pressures of the gases for equal number of moles are :$2 \mathrm{P}_{\mathrm{A}}=3 \mathrm{P}_{\mathrm{B}}$$\mathrm{P}_{\mathrm{A}}=3 \mathrm{P}_{\mathrm{B}}$$\mathrm{P}_{\mathrm{A}}=2 \mathrm{P}_{\mathrm{B}}$$3 \mathrm{P}_{\mathrm{A}}=2 \mathrm{P}_{\mathrm{B}}$Correct Option: 1 Solution:...
Read More →The higher concentration of which gas in
Question: The higher concentration of which gas in air can cause stiffness of flower buds ?$\mathrm{SO}_{2}$$\mathrm{NO}_{2}$$\mathrm{CO}_{2}$$\mathrm{CO}$Correct Option: 1 Solution: Due to acid rain in plants high concentration of $\mathrm{SO}_{2}$ makes the flower buds stiff and makes them fall....
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Question: $\mathrm{HCHO}+\mathrm{PhCH}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{MgX}$$\mathrm{PhCOCH}_{2} \mathrm{CH}_{3}+\mathrm{CH}_{3} \mathrm{MgX}$$\mathrm{PhCOCH}_{3}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgX}$$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{3}+\mathrm{PhMgX}$Correct Option: 1 Solution:...
Read More →In the following compound,
Question: In the following compound, the favourable site/s for protonation is/are :-(b), (c) and (d)(a)(a) and (e)(a) and (d)Correct Option: 1 Solution: Localised lone pair $e^{-}$....
Read More →Among the following four aromatic compounds, which one will have the lowest melting point ?
Question: Among the following four aromatic compounds, which one will have the lowest melting point ?Correct Option: 1 Solution: M.P. of Napthalene $\simeq 80^{\circ} \mathrm{C}$...
Read More →The number of bridging
Question: The number of bridging $\mathrm{CO}$ ligand (s) and $\mathrm{Co}-$ Co bond (s) in $\mathrm{CO}_{2}(\mathrm{CO}) \mathrm{g}$, respectively are :-0 and 22 and 04 and 02 and 1Correct Option: , 4 Solution: Bridging $\mathrm{CO}$ are 2 and $\mathrm{Co}-\mathrm{Co}$ bond is 1 ....
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Question: Poly- $\beta$-hydroxybutyrate-co- $\beta$ - hydroxyvalerate(PHBV) is a copolymer of3-hydroxybutanoic acid and 4-hydroxypentanoic acid2-hydroxybutanoic acid and 3-hydroxypentanoic acid3-hydroxybutanoic acid and 2-hydroxypentanoic acid3-hydroxybutanoic acid and 3-hydroxypentanoic acidCorrect Option: , 4 Solution: PHBV is a polymer of 3 -hydroxybutanoic acid and 3-Hydroxy pentanoic acid....
Read More →The major product obtained in the following conversion is :-
Question: The major product obtained in the following conversion is :- Correct Option: , 2 Solution:...
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Question: Freezing point of a $4 \%$ aqueous solution of $\mathrm{X}$ is equal to freezing point of $12 \%$ aqueous solution of Y. If molecular weight of $\mathrm{X}$ is $\mathrm{A}$, then molecular weight of $Y$ is :-$\mathrm{A}$$3 \mathrm{~A}$$4 \mathrm{~A}$$2 \mathrm{~A}$Correct Option: , 2 Solution:...
Read More →Taj Mahal is being slowly disfigured and discoloured.
Question: Taj Mahal is being slowly disfigured and discoloured. This is primarily due to :-Water pollutionGlobal warmingSoil pollutionAcid rainCorrect Option: , 4 Solution: Taj mahal is slowely disfigured and discoloured due to acid rain....
Read More →Two solids dissociate as follows
Question: Two solids dissociate as follows $\mathrm{A}(\mathrm{s}) \rightleftharpoons \mathrm{B}(\mathrm{g})+\mathrm{C}(\mathrm{g}) ; \mathrm{K}_{\mathrm{p}_{1}}=\mathrm{x} \mathrm{atm}^{2}$ $\mathrm{D}(\mathrm{s}) \rightleftharpoons \mathrm{C}(\mathrm{g})+\mathrm{E}(\mathrm{g}) ; \mathrm{K}_{\mathrm{p}_{2}}=\mathrm{y} a \mathrm{~atm}^{2}$ The total pressure when both the solids dissociate simultaneously is :-$x^{2}+y^{2} a t m$$x^{2}+y^{2}$ atm$2(\sqrt{x+y}) a \operatorname{atm}$$\sqrt{x+y}$ at...
Read More →The correct match between Item I and Item II is :-
Question: The correct match between Item I and Item II is :- $(\mathrm{A}) \rightarrow(\mathrm{Q}) ;(\mathrm{B}) \rightarrow(\mathrm{S}) ;(\mathrm{C}) \rightarrow(\mathrm{P})$$(\mathrm{A}) \rightarrow(\mathrm{R}) ;(\mathrm{B}) \rightarrow(\mathrm{Q}) ;(\mathrm{C}) \rightarrow(\mathrm{P})$$(\mathrm{A}) \rightarrow(\mathrm{Q}) ;(\mathrm{B}) \rightarrow(\mathrm{S}) ;(\mathrm{C}) \rightarrow(\mathrm{R})$$(\mathrm{A}) \rightarrow(\mathrm{R}) ;(\mathrm{B}) \rightarrow(\mathrm{S}) ;(\mathrm{C}) \righta...
Read More →The homopolymer formed from 4-hydroxybutanoic acid
Question: The homopolymer formed from 4-hydroxybutanoic acid is :-Correct Option: 1 Solution:...
Read More →In a chemical reaction
Question: In a chemical reaction, $\mathrm{A}+2 \mathrm{~B} \stackrel{\mathrm{K}}{\rightleftharpoons} 2 \mathrm{C}+\mathrm{D}$, the initial concentration of $\mathrm{B}$ was $1.5$ times of the concentration of A, but the equilibrium concentrations of $\mathrm{A}$ and $\mathrm{B}$ were found to be equal. The equilibrium constant $(K)$ for the aforesaid chemical reaction is:1641$\frac{1}{4}$Correct Option: , 2 Solution:...
Read More →The correct option with respect to the Pauling
Question: The correct option with respect to the Pauling electronegativity values of the elements is :-$\mathrm{Ga}\mathrm{Ge}$$\mathrm{Si}\mathrm{Al}$$\mathrm{P}\mathrm{S}$$\mathrm{Te}\mathrm{Se}$Correct Option: 1 Solution: Along the period electronegativity increases...
Read More →The major product of the following reaction is:
Question: The major product of the following reaction is: Correct Option: , 3 Solution: DIBAL-H will reduce cyanides \ esters to aldehydes....
Read More →Iodine reacts with concentrated
Question: Iodine reacts with concentrated $\mathrm{HNO}_{3}$ to yield $\mathrm{Y}$ along with other products. The oxidation state of iodine in $\mathrm{Y}$, is :-5317Correct Option: 1 Solution: $\mathrm{I}_{2}+10 \mathrm{HNO}_{3} \longrightarrow 2 \mathrm{HIO}_{3}+10 \mathrm{NO}_{2}+4 \mathrm{H}_{2} \mathrm{O}$...
Read More →Consider the following reversible chemical reactions :
Question: Consider the following reversible chemical reactions : $\mathrm{A}_{2}(\mathrm{~g})+\mathrm{Br}_{2}(\mathrm{~g}) \stackrel{\mathrm{k}_{1}}{\rightleftharpoons} 2 \mathrm{AB}(\mathrm{g}) \ldots . .(1)$ $6 \mathrm{AB}(\mathrm{g}) \stackrel{\mathrm{K}_{2}}{\rightleftharpoons} 3 \mathrm{~A}_{2}(\mathrm{~g})+3 \mathrm{~B}_{2}(\mathrm{~g}) \ldots . .(2)$ The relation between $K_{1}$ and $K_{2}$ is :$\mathrm{K}_{2}=\mathrm{K}_{1}{ }^{3}$$\mathrm{K}_{2}=\mathrm{K}_{1}^{-3}$$\mathrm{K}_{1} \math...
Read More →Which of the following compounds is not aromatic?
Question: Which of the following compounds is not aromatic? Correct Option: , 3 Solution:...
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