1
JEE Main 2024 (Online) 9th April Morning Shift
MCQ (Single Correct Answer)
+4
-1

JEE Main 2024 (Online) 9th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 14 English

What is the structure of C?

A
JEE Main 2024 (Online) 9th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 14 English Option 1
B
JEE Main 2024 (Online) 9th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 14 English Option 2
C
JEE Main 2024 (Online) 9th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 14 English Option 3
D
JEE Main 2024 (Online) 9th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 14 English Option 4
2
JEE Main 2024 (Online) 9th April Morning Shift
MCQ (Single Correct Answer)
+4
-1

The electronic configuration of $$\mathrm{Cu}(\mathrm{II})$$ is $$3 \mathrm{~d}^9$$ whereas that of $$\mathrm{Cu}(\mathrm{I})$$ is $$3 \mathrm{~d}^{10}$$. Which of the following is correct?

A
$$\mathrm{Cu}(\mathrm{II})$$ is more stable
B
$$\mathrm{Cu}$$ (II) is less stable
C
$$\mathrm{Cu}(\mathrm{I})$$ and $$\mathrm{Cu}(\mathrm{II})$$ are equally stable
D
Stability of $$\mathrm{Cu}(\mathrm{I})$$ and $$\mathrm{Cu}(\mathrm{II})$$ depends on nature of copper salts
3
JEE Main 2024 (Online) 9th April Morning Shift
MCQ (Single Correct Answer)
+4
-1

In which one of the following pairs the central atoms exhibit $$\mathrm{sp}^2$$ hybridization ?

A
$$\mathrm{BF}_3$$ and $$\mathrm{NO}_2^{-}$$
B
$$\mathrm{NH}_2^{-}$$ and $$\mathrm{BF}_3$$
C
$$\mathrm{NH}_2^{-}$$ and $$\mathrm{H}_2 \mathrm{O}$$
D
$$\mathrm{H}_2 \mathrm{O}$$ and $$\mathrm{NO}_2$$
4
JEE Main 2024 (Online) 9th April Morning Shift
MCQ (Single Correct Answer)
+4
-1

Relative stability of the contributing structures is :

JEE Main 2024 (Online) 9th April Morning Shift Chemistry - Basics of Organic Chemistry Question 23 English

A
(II) > (I) > (III)
B
(III) > (II) > (I)
C
(I) > (III) > (II)
D
(I) > (II) > (III)
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