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During the borax bead test with \( \mathrm{CuSO_4} \), a blue green colour of the bead was observed in oxidising flame due to the formation of:

Which element is not present in Nesskr’s reagent?

Number of compounds giving (i) red colouration with ceric ammonium nitrate and also (ii) positive iodoform test from the following is ______.

Which of the following compounds would give the following set of qualitative analysis?
(i) Fehling’s Test : Positive
(ii) \( \mathrm{Na} \) Fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not Prussian blue.

Compound that will give positive Lassaigne’s test for both nitrogen and halogen is:

In the wet tests for identification of various cations by precipitate, which transition element cation doesn’t belong to group IV in qualitative inorganic analysis?

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JEE Main 2023 1st Feb Evening Shift

Which element is not present in Nesskr’s reagent?