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In Chemistry / High School | 2025-07-08

1. Select the correct option: 1. Which is the symbol of mercury? (a) Cu (b) Hg (c) Au (d) Mg 2. Which of the following is a metal? (a) Nitrogen (b) Oxygen (c) Sodium (d) Carbon 3. Which of the following is the most unreactive metal? (a) Iron (b) Lead (c) Aluminium (d) Gold 4. Which of the following is a soft metal? (a) Sodium (b) Cobalt (c) Magnesium (d) Iron 5. Which of the following is a molecule of compound? (a) Ozone (b) Chlorine (c) Water (d) Hydrogen 6. The positively charged particles in an atom are called (a) neutrons (b) electrons (c) protons (d) none of these 7. Which of the following non-metals is found in a liquid state? (a) Iodine (b) Chlorine (c) Bromine (d) Carbon II. State if the following statements are True or False. Correct the false statement. 1. A molecule is the smallest particle of an element. 2. A pure substance consists of particles of only one kind. 3. Mercury is a non-metal. 4. Water is a compound made up of hydrogen and oxygen gas. 5. Constituents of a mixture are present in a fixed proportion.

Asked by farrynbreann4345

Answer (1)

The symbol of mercury is (b) Hg .

Among the options listed, the metal is (c) Sodium . Sodium is an alkali metal known for being highly reactive, especially with water.

The most unreactive metal is (d) Gold . Gold is known for its lack of reactivity and resistance to tarnishing or corrosion.

The soft metal among the choices is (a) Sodium . Sodium is soft enough to be cut with a knife.

A molecule of a compound from the options given is (c) Water . Water (H₂O) is a compound made up of two hydrogen atoms bonded to one oxygen atom.

The positively charged particles in an atom are called (c) protons . Protons reside in the nucleus of an atom and have a positive charge.

The non-metal typically found in a liquid state is (c) Bromine . Bromine is one of the only two elements that are liquid at room temperature (the other being mercury).


II. True or False Statements:

False. A molecule is the smallest particle of a compound that retains the chemical properties of that compound, not an element.

True. A pure substance consists of particles of only one kind, either elements or compounds.

False. Mercury is a metal . It is a heavy, silvery element that is liquid at room temperature.

True. Water is indeed a compound made up of hydrogen and oxygen gas, though the gases combine to form liquid water.

False. Constituents of a mixture are not present in a fixed proportion; they can mix in any ratio.

Answered by DanielJosephParker | 2025-07-21