Question

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.

• A. Both Statement-I and Statement-II are true
• B. Both Statement-I and Statement-II are false
• C. Statement-I is true but Statement-II is false
• D. Statement-I is false but Statement-II is true

Answer 1

The Correct Option is C

To evaluate the two statements about Stannane, let's break them down:

1. 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.

2. 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.