Hydrogen chloride molecule contains:

Options

A. Polar covalent bond
B. Double bond
C. Coordinate bond
D. Electrovalent bond

Explanation

To determine what a hydrogen chloride (HCl) molecule contains, we can analyze the bonding characteristics of the atoms involved. Here’s a step-by-step solution:

### Step 1: Identify the Atoms in HCl
- Hydrogen (H) and Chlorine (Cl) are the two atoms that make up the hydrogen chloride molecule.

### Step 2: Determine the Electronic Configuration
- Hydrogen has an atomic number of 1, which means it has 1 electron. Its electronic configuration is 1s¹.
- Chlorine has an atomic number of 17, and its electronic configuration is 1s² 2s² 2p⁶ 3s² 3p⁵. This means chlorine has 7 electrons in its outermost shell (3s² 3p⁵).

### Step 3: Analyze the Bonding
- Both hydrogen and chlorine are non-metals, which means they will form a covalent bond rather than an ionic bond.
- Hydrogen needs 1 more electron to complete its duplet (2 electrons), while chlorine needs 1 more electron to complete its octet (8 electrons).

### Step 4: Formation of the Covalent Bond
- In HCl, hydrogen shares its 1 electron with chlorine, and chlorine shares its 1 electron with hydrogen. This sharing of electrons forms a single covalent bond.

### Step 5: Determine the Polarity of the Bond
- Chlorine is more electronegative than hydrogen, meaning it has a stronger attraction for the shared electrons.
- As a result, the shared electrons are pulled closer to chlorine, giving it a partial negative charge (δ-) and leaving hydrogen with a partial positive charge (δ+).
- This unequal sharing of electrons indicates that the bond is polar.

### Conclusion
- The hydrogen chloride molecule contains a polar covalent bond.

### Final Answer
**Hydrogen chloride molecule contains a polar covalent bond.**

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