Given below are two statements.
Statement-I: Stannane is an example of a molecular hydride.
Statement-II: Stannane is a planar molecule
In the light of the above statement, choose the most appropriate answer from the options given below.
Statement-I: Stannane is an example of a molecular hydride.
Statement-II: Stannane is a planar molecule
In the light of the above statement, choose the most appropriate answer from the options given below.
- Both Statement-I and Statement-II are true
- Both Statement-I and Statement-II are false
- Statement-I is true but Statement-II is false
- Statement-I is false but Statement-II is true
The Correct Option is C
Solution and Explanation
To evaluate the two statements about Stannane, let's break them down:
-
Statement-I: Stannane is an example of a molecular hydride.
- Molecular hydrides typically form when non-metals combine with hydrogen, resulting in covalent compounds. Examples include water (H2O) and methane (CH4).
- Stannane, with the chemical formula SnH4, is formed by the covalent bonding of tin (Sn) and hydrogen (H). This compound is known as tin tetrahydride and is indeed a molecular hydride because of its covalent nature.
This makes Statement-I true.
-
Statement-II: Stannane is a planar molecule.
- Planar molecules have a flat geometry in which all atoms lie in the same plane.
- Stannane (SnH4) has a tetrahedral geometry due to VSEPR (Valence Shell Electron Pair Repulsion) theory. In a tetrahedral structure, the central atom (tin, in this case) is surrounded symmetrically by four hydrogen atoms, none of which lie in the same plane.
Thus, Statement-II is false as Stannane is not a planar molecule but a tetrahedral one.
Given these analyses, the correct answer is: Statement-I is true but Statement-II is false.
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Concepts Used:
Coordination Compounds
A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.
Coordination entity:
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
Ligands:
A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.