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3 years ago

Which of the following describe chemical properties?

2 answers:

3 0

<span>chemical properties is the changes in chemical manner of a
substances. Antacid tablets neutralize stomach acid is a chemical properties (it is an acid) which produce new products... salt and water
The others are physical properties</span>

Rom4ik [11]3 years ago

3 0

Answer: Option (b) is the correct answer.

Explanation:

When any change in the chemical composition of a substance occurs then it is known as a chemical change.

For example, reactivity, toxicity, flammability, combustion etc are all chemical properties.

So, when sugar burns in air to form water and carbon dioxide then there occurs change in chemical composition of sugar. Therefore, chemical property of sugar also changes.

On the other hand, when there occurs no change in chemical composition of a substance then it is known as physical property.

For example, density, boiling point, freezing point etc are all physical properties.

Therefore, we can conclude that sugar burns in air to form water and carbon dioxide describe chemical properties.

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2 years ago

Elements of modern periodic table are arrang in ---Group 2A elements are called ------ and group 7A element table are called....

pentagon [3]

Answer:

c) atomic number / alkaline earth metals/ and halogens

Explanation:

Elements of modern periodic table are arrang in atomic number; for its electron configuration and its chemical properties. This arrangement shows periodic trends.

Alkaline earth metals are a group of elements that are located in group 2 of the Periodic Table and are the following: Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba) and Radio (Ra).

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3 years ago

Which one of the following items does NOT characterize a reducing agent? a. A reducing agent loses electrons. b. A reducing agen

Ad libitum [116K]

Answer: D

Explanation:

A reducing agent is a species that reduces other compounds, and is thereby oxidized. The whole compound becomes the reducing agent. In other words, of a compound is oxidized, then they are the reducing agent. On the other hand, if the compound is reduced, it is an ozidizing agent.

Since we have established that a reducing agent is the compound being oxidized, we know that A is not our answer. An oxidized compound is losing electrons. Choice A states exactly this.

For B, this is true as we have established this already.

C is also correct. Since a reducing agent loses electrons, it becomes more positive. This makes the oxidation number increase.

D would be our correct answer. It is actually a good oxidizing agent is a metal in a high oxidation state, such as Mn⁷⁺.

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Answer:

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