In the reaction, 2 HI + H 2 SO 4 con . → A + 2 H 2 O + SO 2 , identify the product A .

Sulphuric acid acts as an oxidising agent. When hydrogen iodide is treated with concentrated sulphuric acid, it is oxidised to iodine ( A ) and sulphuric acid is reduced to sulphur dioxide. The reaction can be written as given below. 2 HI + H 2 SO 4 con . → I 2 + 2 H 2 O + SO 2

When sulphur S is boiled with Na 2 SO 3 , a compound A is produced with excess of AgNO 3 solution gives a compound B which is water soluble and produces a black coloured sulphide C. Compounds A, B and C are

Na 2 S 2 O 3 , Ag 2 S 2 O 3 , Ag 2 S

Na 2 S 4 O 6 , Ag 2 SO 4 , Ag 2 O

Na 2 S 4 O 6 , Ag 2 S 2 O 3 , Ag 2 O

EASY

Earn 100

Write the chemical equation for thermal decomposition of silver oxide.

Important Questions on p-Block Elements

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

On electrolysis of dil. sulphuric acid using Platinum

(Pt)

electrode, the product obtained at anode will be

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

Which of the following element does not react with oxygen directly?

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

What colour is produced when

H_{2} S

gas is passed through an alkaline aqueous solution of sodium nitroprusside?

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

Gas obtained by heating potassium permanganate is:

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

Write down the formula of the precipitate formed when

H_{2} S

gas is passed through an aqueous solution of silver nitrate.

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

Explain the reaction of concentrated sulphuric acid with copper.

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

H_{2} S

is a poisonous gas. Why?

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

Explain the reaction of

H_{2} {SO}_{4}

with

HI

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

In the reaction of hot concentrated sulphuric acid with copper, sulphuric acid is reduced to

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

Represent the union of two sets by Venn diagram for each of the following.

$X = {x | x$ is a prime number between $80$ and $100}$

$Y = {y | y$ is an odd number between $90$ and $100}$

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

Sodium thiosulphate is prepared by

HARD

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

On oxidation with iodine, sulphite ion is transformed to

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

Is copper oxidised or reduced in the following reaction?

$Cu + 2 H_{2} {SO}_{4} \to CuSO 4 + {SO}_{2} + 2 H_{2} O$

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

Which of the following compounds, when heated with conc.

H_{2} {SO}_{4},

liberates a gas which turns starch paper blue?

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

In the reaction,

2 HI + H_{2} {SO}_{4} (con .) \overset{}{\to} A + 2 H_{2} O + {SO}_{2}

, identify the product

A

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

Which of the following on reacting with

H_{2} S

does not produce metallic sulphide?

HARD

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

Complete the following reaction.

$HBr + H_{2} {SO}_{4} \to$

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

When sulphur S is boiled with Na₂SO₃, a compound A is produced with excess of AgNO₃ solution gives a compound B which is water soluble and produces a black coloured sulphide C. Compounds A, B and C are

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

H_{2} S

burns in

O_{2}

to form

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Oxygen

{Na}_{2} S_{2} O_{3}

is prepared by:

Write the chemical equation for thermal decomposition of silver oxide.

Important Questions on p-Block Elements

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