1
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Formulae for Nessler's reagent is :
A
$\mathrm{KHgI}_3$
B
$\mathrm{HgI}_2$
C
$\mathrm{KHg}_2 \mathrm{I}_2$
D
$\mathrm{K}_2 \mathrm{HgI}_4$
2
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
$\mathrm{KMnO}_4$ oxidises $\mathrm{I}^{-}$ in acidic and neutral/faintly alkaline solutions, respectively, to :
A
$\mathrm{IO}_3^{-} ~\&~ \mathrm{IO}_3^{-}$
B
$\mathrm{I}_2 ~\&~ \mathrm{I}_2$
C
$\mathrm{I}_2 ~\&~ \mathrm{IO}_3^{-}$
D
$\mathrm{IO}_3^{-} ~\&~ \mathrm{I}_2$
3
JEE Main 2023 (Online) 30th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

During the qualitative analysis of $$\mathrm{SO}_{3}^{2-}$$ using dilute $$\mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{SO}_{2}$$ gas is evolved which turns $$\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$$ solution (acidified with dilute $$\mathrm{H}_{2} \mathrm{SO}_{4}$$) :

A
blue
B
black
C
red
D
green
4
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement I : Nickel is being used as the catalyst for producing syn gas and edible fats.

Statement II : Silicon forms both electron rich and electron deficient hydrides.

In the light of the above statements, choose the most appropriate answer from the options given below :

A
Statement I is correct but statement II is incorrect
B
Both the statements I and II are correct
C
Both the statements I and II are incorrect
D
Statement I is incorrect but statement II is correct
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