1
JEE Main 2024 (Online) 5th April Morning Shift
Numerical
+4
-1
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In the lewis dot structure for $$\mathrm{NO}_2^{-}$$, total number of valence electrons around nitrogen is _________.

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2
JEE Main 2024 (Online) 5th April Morning Shift
Numerical
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The value of Rydberg constant $$(R_H)$$ is $$2.18 \times 10^{-18} \mathrm{~J}$$. The velocity of electron having mass $$9.1 \times 10^{-31} \mathrm{~kg}$$ in Bohr's first orbit of hydrogen atom = ________ $$\times 10^5 \mathrm{~ms}^{-1}$$ (nearest integer).

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3
JEE Main 2024 (Online) 5th April Morning Shift
Numerical
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$$9.3 \mathrm{~g}$$ of pure aniline is treated with bromine water at room temperature to give a white precipitate of the product '$$\mathrm{P}$$'. The mass of product '$$\mathrm{P}$$' obtained is $$26.4 \mathrm{~g}$$. The percentage yield is ________ %.

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4
JEE Main 2024 (Online) 5th April Morning Shift
Numerical
+4
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Consider the given chemical reaction sequence :

JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Alcohols, Phenols and Ethers Question 12 English

Total sum of oxygen atoms in Product A and Product B are ________.

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