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Q JEE MAIN 2025
$37.8\;{\rm{g}}\;{{\rm{N}}_2}{{\rm{O}}_5}$ was taken in a 1 L reaction vessel and allowed to undergo the following reaction at 500 K $2\;{{\rm{N}}_2}{{\rm{O}}_{5(\:{\rm{g}})}}$ $\rightleftharpoons$ $2\;{{\rm{N}}_2}{{\rm{O}}_{4(\:{\rm{g}})}} + {{\rm{O}}_{2(\:{\rm{g}})}}$
...
JEE Main Chemistry Medium
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Q JEE MAIN 2025
Xg of benzoic acid on reaction with aq ${\rm{NaHC}}{{\rm{O}}_3}$ released ${\rm{C}}{{\rm{O}}_2}$ that occupied 11.2 L volume at STP. X is ________ g.
JEE Main Chemistry Medium
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Q JEE MAIN 2025
Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with ${{\rm{K}}_4}\left[ {{\rm{Fe}}{{({\rm{CN}})}_6}} \right]$ is ________.
$...
JEE Main Chemistry Medium
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Q JEE MAIN 2025
Consider the following reaction occurring in the blast furnace:
${\rm{F}}{{\rm{e}}_3}{{\rm{O}}_{4(\;{\rm{s}})}} + 4{\rm{C}}{{\rm{O}}_{({\rm{g}})}} \to 3{\rm{F}}{{\rm{e}}_{({\rm{l}})}} + 4{\rm{C}}{{\rm{O}}_{2(\;{\rm{g}})}}$
'x' kg of iron is produced when $...
JEE Main Chemistry Medium
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Q JEE MAIN 2025
Standard entropies of ${{\rm{X}}_2},{{\rm{Y}}_2}$ and ${\rm{X}}{{\rm{Y}}_5}$ are 70, 50 and $110{\mkern 1mu} {\rm{J}}{{\rm{K}}^{-1}}{\rm{mo}}{{\rm{l}}^{-1}}$ respectively. The temperature in Kelvin at which the reaction $...
JEE Main Chemistry Medium
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Q JEE MAIN 2025
Preparation of potassium permanganate from ${\rm{Mn}}{{\rm{O}}_2}$ involves two step process in which the 1st step is a reaction with KOH and ${\rm{KN}}{{\rm{O}}_3}$ to produce
JEE Main Chemistry Easy
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Q JEE MAIN 2025
$\;{{\rm{K}}_{{\rm{sp }}}}$ for ${\rm{Cr}}{({\rm{OH}})_3}$ is $1.6 \times {10^{ - 30}}$. What is the molar solubility of this salt in water?
JEE Main Chemistry Easy
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Q JEE MAIN 2025
Following are the four molecules "P", "Q", "R" and "S".
Which one among the four molecules will react with ${\rm{H}} - {\rm{B}}{{\rm{r}}_{({\rm{aq}})}}$ at the fastest...
JEE Main Chemistry Easy
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Q JEE MAIN 2025
The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of
JEE Main Chemistry Easy
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Q JEE MAIN 2025
Given below are two statements I and II.
Statement-I : Dumas method is used for estimation of "Nitrogen" in an organic compound.
Statement-II : Dumas...
JEE Main Chemistry Medium
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Q JEE MAIN 2025
Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?
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Q JEE MAIN 2025
Given below are two statements:
Statement-I : The conversion proceeds well in the less polar medium.
$...
JEE Main Chemistry Medium
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Q JEE MAIN 2025
One mole of the octahedral complex compound ${\rm{Co}}{\left( {{\rm{N}}{{\rm{H}}_3}} \right)_5}{\rm{C}}{{\rm{l}}_3}$ gives 3 moles of ions on dissolution in water. One mole of the same complex...
JEE Main Chemistry Medium
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Q JEE MAIN 2025
The carbohydrate "Ribose" present in DNA, is
A. A pentose sugar
B. present in pyranose from
C. in "D" configuration
D. a reducing sugar,...
JEE Main Chemistry Medium
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Q JEE MAIN 2025
Which of the following ions is the strongest oxidizing agent?
(Atomic Number of Ce = 58, Eu = 63, Tb = 65, Lu = 71)
JEE Main Chemistry Easy
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Q JEE MAIN 2025
For the given cell
${\rm{F}}{{\rm{e}}^{2 + }}_{\left( {{\rm{aq}}} \right)} + {\rm{Ag}}_{\left( {{\rm{aq}}} \right)}^ + \to {\rm{F}}{{\rm{e}}^{3 + }}_{\left( {{\rm{aq}}} \right)} + {\rm{A}}{{\rm{g}}_{\left( {\rm{s}} \right)}}$
The...
JEE Main Chemistry Medium
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Q JEE MAIN 2025
The product (1) formed in the following reaction sequence is
JEE Main Chemistry Medium
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Q JEE MAIN 2025
Let us consider an endothermic reaction which is non-spontaneous at the freezing point of water. However, the reaction is spontaneous at boiling point of water....
JEE Main Chemistry Easy
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Q JEE MAIN 2025
Which one of the carbocations from the following is most stable?
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Q JEE MAIN 2025
Consider the given plots of vapour pressure (VP) vs temperature (T/K). Which amongst the following options is correct graphical representation showing $\Delta {{\rm{T}}_{\rm{f}}}$, depression in...
JEE Main Chemistry Medium
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Q JEE MAIN 2025
Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in z-direction]?
A....
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