Noble gases can diffuse through ______.

Important Questions on The p-Block Elements

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 62

A mixture of ammonia and air at about $1100 \mathrm{K}$ in the presence of $\mathrm{Pt}$ gauze forms _______.

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 63

Nessler's reagent is an alkaline solution of ______.

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 64

Which of the following oxides of nitrogen combines with $\mathrm{Fe}$($\mathrm{II}$) ions to form a brown complex?

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 65

Elements of group $16$ (except polonium) are called chalcogens because_______.

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 66

The first ionization energies of the lighter elements of group $16$ are _______those of group $15$ elements.

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 67

Which of the following gases present in air protects life on the earth from the harmful effects of ultraviolet rays from the sun?

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 68

Which of the following statements about sulphur is INCORRECT?

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 69

Copper turnings when heated with concentrated sulphuric acid will give: