Question

7. Which two elements are liquid
*
O a. Mercury and bromine
O b. Mercury and carbon dioxide
O c. Bromine and water
O d. None​

Answer 1

Answer:

Mercury and bromine are liquid at room temperature

Explanation:

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Answer 2

Mercury and bromine are liquids. (option a)

• Among the given sets of substances, both the set (b) and set (c) contain one chemical compound and one element, instead of containing two elements. [Carbon dioxide is the compound in set (b) and Water is the compound of set (c)]
• So, set (b) and set (c) are eliminated, as we need elements only.
• Now, in the set (a), both are elements (ie. Mercury and Bromine).
• Both mercury and bromine are liquids at room temperature.
• So, the substances in the set (a) matches all the given criteria.
• That's why, the correct answer is option a (ie. Mercury and Bromine).