JEE Main 2026 · 2 Apr · Shift 1 · Chemistry Q70

← JEE Main 2026 · 2 Apr · Shift 1

ChemistrySingle correct+4 / -1Question 70 of 75

A salt with few drops of conc. HCl gives apple green colour in flame test. The group precipitate of the salt is dissolved in acetic acid and treated with $\ce{K2CrO4}$ to give yellow precipitate. When the sodium carbonate extract of the salt solution is heated with conc. $\ce{HNO3}$ and ammonium molybdate, it resulted a canary yellow precipitate. The cation and anion present in the salt are respectively,

\ce{Ca^{2+}}

and

\ce{SO4^{2-}}

\ce{Ba^{2+}}

and

\ce{PO4^{3-}}

\ce{Mn^{2+}}

and

\ce{PO4^{3-}}

\ce{Ba^{2+}}

and

\ce{SO4^{2-}}

Answer and worked solution

Official answer: B

Cation. Apple-green flame and a yellow $\ce{BaCrO4}$ precipitate with $\ce{K2CrO4}$ in acetic acid: $\ce{Ba^{2+}}$ .

Anion. A canary-yellow ammonium phosphomolybdate precipitate with ammonium molybdate/ $\ce{HNO3}$ : $\ce{PO4^{3-}}$ .

(B)

Topics:Cation analysis Anion analysis Flame and borax bead tests

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JEE Main 2026 · 2 Apr · Shift 1, Chemistry question 70