JEE Main 2021 (Online) 31st August Evening Shift | p-Block Elements Question 68 | Chemistry

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JEE Main 2021 (Online) 31st August Evening Shift

MCQ (Single Correct Answer)

-1

The number of S = O bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are :

2, 3 and 4

1, 4 and 3

2, 4 and 3

1, 4 and 4

JEE Main 2021 (Online) 27th August Evening Shift

MCQ (Single Correct Answer)

-1

Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K?

White phosphorus

Yellow phosphorus

$$\beta$$-Black phosphorus

$$\alpha$$-Black phosphorus

JEE Main 2021 (Online) 27th August Morning Shift

MCQ (Single Correct Answer)

-1

In polythionic acid, H₂S_xO₆ (x = 3 to 5) the oxidation state(s) of sulphur is/are :

+ 5 only

+ 6 only

+ 3 and + 5 only

0 and + 5 only

JEE Main 2021 (Online) 26th August Evening Shift

MCQ (Single Correct Answer)

-1

The number of non-ionisable hydrogen atoms present in the final product obtained from the hydrolysis of PCl₅ is :

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