Which ion gives a violet-coloured bead in the borax bead test?

  • A
    $Fe^{2+}$
  • B
    $Ni^{2+}$
  • C
    $Co^{2+}$
  • D
    $Mn^{2+}$

Explore More

Similar Questions

Identify the last step in wet chemical synthesis of nanomaterial.

Which one of the following metals will give blue ash when its salt is heated with $Na_2CO_3$ solid and $Co(NO_3)_2$ on a charcoal piece?

Which of the following gives the chromyl chloride test?

Match List-$I$ with List-$II$ and choose the correct answer from the options given below:
List-$I$ (Name of the test)List-$II$ (Reaction sequence involved) [$M$ is metal]
$A$. Borax bead test$I$. $MCO_3$ $\rightarrow MO$ $\xrightarrow[+\Delta]{Co(NO_3)_2} CoO \cdot MO$
$B$. Charcoal cavity test$II$. $MCO_3$ $\rightarrow MCl_2$ $\rightarrow M^{2+}$
$C$. Cobalt nitrate test$III$. $MSO_4$ $\xrightarrow[\Delta]{Na_2B_4O_7} M(BO_2)_2$ $\rightarrow MBO_2$ $\rightarrow M$
$D$. Flame test$IV$. $MSO_4$ $\xrightarrow[\Delta]{Na_2CO_3} MCO_3$ $\rightarrow MO$ $\rightarrow M$

What type of information is collected using $FTIR$ (Fourier transform infrared) spectroscopy?

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo