Question

Among the following, identify the substance in which molecules possess vibratory, rotatory, and translator motions in all directions except in one direction

• A. Bromine
• B. Iodine
• C. Ammonia
• D. Silicon dioxide

Answer 1

The correct option is A

Bromine

Explanation for correct options

Option(a) - Bromine

• The molecules of liquid substance possess vibratory, rotatory, and translator motions in all directions except in the upward direction.
• From the given options only bromine is liquid.
• Therefore, it shows vibratory, rotatory, and translator motions in all directions except in the upward direction.

Explanation for incorrect options

Option(b) - Iodine

• Iodine exist in solid form.
• Solids only show vibratory motion.

Option(c) - Ammonia

• Ammonia exists in gaseous form.
• Gases can go in any direction and are not restricted to one direction.

Option(d) - Silicon dioxide

• Silicon dioxide is also a gas and can expand in any direction.
• Therefore, not restricted to one direction.

Thus, only bromine possesses vibratory, rotatory, and translator motions in all directions except in the upward direction.

Therefore, option(a) is correct.