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The p -Block Elements

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The p -Block Elements Class 11th

Nitrogen gas is obtained by thermal decomposition of

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Raj Pandey

Contributor-Level 9

N₂ gas is obtained by thermal decomposition of Ba (N₃)₂ as,

$B a {(N_{3})}_{2} \to_{}^{Δ} B a + 3 N_{2} ↑$

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The p -Block Elements Class 11th

A white precipitate was formed when BaCl₂ was added to water extract of an inorganic salt. Further, a gas 'X' with characteristic odour was released when the formed white precipitate was dissolved in dilute HCl. The anion present in the inorganic salt is

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alok kumar singh

Contributor-Level 10

$B a C l_{2} + S O_{3}^{2 -} \overset{}{\to} \underset{W h i t e}{B a S O_{3}} ↓ \overset{d i l . H C l}{\to} \underset{\begin{array}{l} b u r n i n g s u l p h u r \\ l i k e s m e l l \end{array}}{S O_{2} ↑}$

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The p -Block Elements Class 11th

Aqueous solution of which of the following boron compounds will be strongly basic in nature?

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alok kumar singh

Contributor-Level 10

Borax forms basic buffer solution in aqueous medium.

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The p -Block Elements Class 11th

Which of the following sets of quantum numbers is not allowed?

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Raj Pandey

Contributor-Level 9

Value of n & $l$ can't be same

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The p -Block Elements Class 11th

Given below are the oxides :

Na₂O, As₂O₃, N₂O, NO and Cl₂O₇

Number of amphoteric oxides is :

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Raj Pandey

Contributor-Level 9

Acidic oxide Þ Cl₂O₇

Neutral oxide Þ N₂O, NO

Basic oxide Þ Na₂O

Amphoteric oxide Þ As₂O₃

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The p -Block Elements Class 11th

In a compound AOH, electronegativity of ' A' is 2.1, the compound would be

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alok kumar singh

Contributor-Level 10

InA-O-H, if EN of ' A' is 2.1 then it will be neutral, as X_A-X₀=X₀-X_H. (where X is EN)

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The p -Block Elements Class 11th

Nitric oxide is formed in the combustion of fuel. An internal combustion engine produces 600 ppm (600 mg L^-1) of NO was oxidized to NO₂. The NO₂ formed was dissolved in 10L of water. The pH of the resulting solution is

(log 2 = 0.30, log 3 = 0.48)

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