XeF4 is isostructural with :
1.
2.
3.
4.
Which of the following is incorrect regarding noble gases?
1. The atomic radii corresponds to van der Waal’s radii.
2. They have the largest size in a period.
3. They are also called inert gases.
4. They combine to form molecules.
In solid-state, PCl5 exists as:
1. | Covalent solid. |
2. | Octahedral structure. |
3. | Ionic solid with [PCl6]+ octahedral and [PCl4]- tetrahedral. |
4. | Ionic solid with [PCl4]+ tetrahedral and [PCl6]- octahedral. |
Match the items in Columns I and II and mark the correct option.
Column I | Column II |
A. H2SO4 | 1. Highest electron affinity |
B. CCl3NO2 | 2. Chalcogen |
C. Cl2 | 3. Tear gas |
D. Sulphur | 4. Storage batteries |
Codes
A | B | C | D | |
1. | 4 | 3 | 1 | 2 |
2. | 3 | 4 | 1 | 2 |
3. | 4 | 1 | 2 | 3 |
4. | 2 | 1 | 3 | 4 |
Assertion (A): | HI cannot be prepared by the reaction of KI with concentrated H2SO4. |
Reason (R): | HI has the lowest H—X bond strength among halogen acids. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | (A) is false but (R) is true. |
Assertion (A): | Both rhombic and monoclinic sulphur exist as S8 but oxygen exists as O2. |
Reason (R): | Oxygen forms pπ - pπ multiple bonds due to its small size and small bond length but pπ - pπ bonding is not possible in sulphur. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion (A): | NaCl reacts with concentrated H2SO4 to give colourless fumes with a pungent smell. But on adding MnO2, the fumes become greenish-yellow. |
Reason (R): | MnO2 oxidizes HCl to chlorine gas which is greenish-yellow. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | (A) is false but (R) is true. |
Assertion (A): | SF6 cannot be hydrolysed but SF4 can be. |
Reason (R): | Six F-atoms in SF6 prevent the attack of H2O on sulphur atom of SF6 |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | (A) is false but (R) is true. |
(a) XeF6 + 3H2O →
(b) XeF6 + H2O
The products formed in the above reactions, respectively, are:
1. XeO3 , XeOF4
2. XeO6 , XeOF4
3. XeO3, XeOF6
4. XeO6 , XeOF6
A xenon fluoride that does not exist is:
1. XeF4
2. XeF2
3. XeF3
4. XeF6