JEE Main 2022 (Online) 29th July Morning Shift | d and f Block Elements Question 14 | Chemistry

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JEE Main 2022 (Online) 29th July Morning Shift

MCQ (Single Correct Answer)

-1

The reaction of zinc with excess of aqueous alkali, evolves hydrogen gas and gives :

$$\mathrm{Zn}(\mathrm{OH})_{2}$$

$$\mathrm{ZnO}$$

$$\left[\mathrm{Zn}(\mathrm{OH})_{4}\right]^{2-}$$

$$\left[\mathrm{ZnO}_{2}\right]^{2-}$$

JEE Main 2022 (Online) 29th July Morning Shift

MCQ (Single Correct Answer)

-1

In following pairs, the one in which both transition metal ions are colourless is :

$$\mathrm{Sc}^{3+}, \mathrm{Zn}^{2+}$$

$$\mathrm{Ti}^{4+}, \mathrm{Cu}^{2+}$$

$$\mathrm{V}^{2+}, \mathrm{Ti}^{3+}$$

$$\mathrm{Zn}^{2+}, \mathrm{Mn}^{2+}$$

JEE Main 2022 (Online) 28th July Evening Shift

MCQ (Single Correct Answer)

-1

Concentrated $$\mathrm{HNO}_{3}$$ reacts with Iodine to give

HI, $$\mathrm{NO}_{2}$$ and $$\mathrm{H}_{2} \mathrm{O}$$

$$\mathrm{HIO}_{2}, \mathrm{~N}_{2} \mathrm{O}$$ and $$\mathrm{H}_{2} \mathrm{O}$$

$$\mathrm{HIO}_{3}, \mathrm{NO}_{2}$$ and $$\mathrm{H}_{2} \mathrm{O}$$

$$\mathrm{HIO}_{4}, \mathrm{NO}_{2}$$ and $$\mathrm{H}_{2} \mathrm{O}$$

JEE Main 2022 (Online) 28th July Morning Shift

MCQ (Single Correct Answer)

-1

Which of the following has least tendency to liberate $$\mathrm{H}_{2}$$ from mineral acids?

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