Q JEE MAIN_2026_

Consider the following reactions $$ \begin{aligned} & \mathrm{Na}_2 \mathrm{~B}_4 \mathrm{O}_7 \xrightarrow{\Delta} 2 \mathrm{X}+\mathrm{Y} \\ & \mathrm{CuSO}_4+\mathrm{Y} \xrightarrow{\text { Non-Luminous flame...

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Q JEE MAIN 2026

In the Group analysis of cations, $\mathrm{Ba}^{2+} \& \mathrm{Ca}^{2+}$ are precipitated respectively as

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Q JEE MAIN 2026

Consider three metal chlorides $\mathrm{x}, \mathrm{y}$ and z , where x is water soluble at room temperature, $y$ is sparingly...

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Q JEE MAIN 2026

A first row transition metal ( $M$ ) does not liberate $H_2$ gas from dilute HCl .1 mol of aqueous...

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Q JEE MAIN 2021

The ratio of number of water molecules in Mohr's salt and potash alum is $\_\_\_\_$ $\times 10^{-1}$. (Integer answer)

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Q JEE MAIN 2021

Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?

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Q JEE MAIN_2021_

To an aqueous solution containing ions such as $\mathrm{Al}^{3+}, \mathrm{Zn}^{2+}, \mathrm{Ca}^{2+}, \mathrm{Fe}^{3+}, \mathrm{Ni}^{2+}, \mathrm{Ba}^{2+}$ and $\mathrm{Cu}^{2+}$ was added conc. HCl...

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Q JEE MAIN 2021

Consider the sulphides $\mathrm{HgS}, \mathrm{PbS}, \mathrm{CuS}, \mathrm{Sb} 2 \mathrm{~S}_3, \mathrm{As}_2 \mathrm{~S}_3$ and CdS . Number of these sulphides soluble in...

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Q JEE MAIN 2021

$\mathrm{Cu}^{2+}$ salt reacts with potassium iodide to give

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Q JEE-MAIN 2021

On complete reaction of FeCl3 with oxalic acid in aqueous solution containing KOH, resulted in the formation of product A....

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Q JEE-Main 2022

In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of...

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Q JEE MAIN 2023

Formation of which complex, among the following, is not a confirmatory test of $\mathrm{Pb}^{2+}$ ions

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Q JEE MAIN 2023

When $\mathrm{Cu}^{2+}$ ion is treated with KI , a white precipitate, X appears in solution. The solution is titrated with...

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Q JEE MAINS 2024

In the precipitation of the iron group (III) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to...

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Q JEE MAIN 2024

Match List I with List II : Choose the correct answer from the options given below :

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Q JEE MAIN 2025

Find the compound ' A ' from the following reaction sequences. $...

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Q JEE MAIN 2025

Identify $\mathrm{A}, \mathrm{B}$ and C in the given below reaction sequence

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