1
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

Among Group 16 elements, which one does NOT show -2 oxidation state?

A
O
B
$$\mathrm{Se}$$
C
$$\mathrm{Te}$$
D
Po
2
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

The $$\mathrm{E}^{\circ}$$ value for the $$\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}$$ couple is more positive than that of $$\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}$$ or $$\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}$$ due to change of

A
$$d^5$$ to $$d^4$$ configuration
B
$$d^5$$ to $$d^2$$ configuration
C
$$d^4$$ to $$d^5$$ configuration
D
$$d^3$$ to $$d^5$$ configuration
3
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

The reagents with which glucose does not react to give the corresponding tests/products are

A. Tollen's reagent

B. Schiff's reagent

C. HCN

D. $$\mathrm{NH}_2 \mathrm{OH}$$

E. $$\mathrm{NaHSO}_3$$

Choose the correct options from the given below:

A
B and C
B
A and D
C
B and E
D
E and D
4
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

Identify the correct reagents that would bring about the following transformation.

NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 2 English

A

(i) $$\mathrm{H}_2 \mathrm{O} / \mathrm{H}^{+}$$

(ii) $$\mathrm{CrO}_3$$

B

(i) $$\mathrm{BH}_3$$

(ii) $$\mathrm{H}_2 \mathrm{O}_2 / \stackrel{\ominus}{\mathrm{O}} \mathrm{H}$$

(iii) PCC

C

(i) $$\mathrm{BH}_3$$

(ii) $$\mathrm{H}_2 \mathrm{O}_2 / \stackrel{\ominus}{\mathrm{O}} \mathrm{H}$$

(iii) alk. $$\mathrm{KMnO}_4$$

D

(i) $$\mathrm{H}_2 \mathrm{O} / \mathrm{H}^{+}$$

(ii) PCC

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