When a metal is put in water, it starts floating and some gas is evolved from it without any fire. A burning candle is put off with a pop sound when a candle is exposed to this gas. The metal can be ____.

To determine the metal, we need to consider the properties described in the question.

First, the metal floats in water, indicating that it is less dense than water. This property eliminates iron as an option since iron is denser than water and would sink.

Next, the gas evolved from the metal extinguishes a burning candle with a pop sound. This suggests that the gas is likely flammable and reactive.

Based on these observations, the metal can be either potassium, lithium, or magnesium. These metals are known to react with water, producing hydrogen gas, which is flammable.

Therefore, the correct answer is either a. potassium, b. lithium, or d. magnesium.

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When a metal is put in water, it starts floating and some gas is evolved from it without any fire. A burning candle is put off with a pop sound when a candle is exposed to this gas. The metal can be ____.

To determine the metal, we need to consider the properties described in the question.

First, the metal floats in water, indicating that it is less dense than water. This property eliminates iron as an option since iron is denser than water and would sink.

Next, the gas evolved from the metal extinguishes a burning candle with a pop sound. This suggests that the gas is likely flammable and reactive.

Based on these observations, the metal can be either potassium, lithium, or magnesium. These metals are known to react with water, producing hydrogen gas, which is flammable.

Therefore, the correct answer is either a. potassium, b. lithium, or d. magnesium.

Knowee AI · Accepted Answer

When a metal is put in water, it starts floating and some gas is evolved from it without any fire. A burning candle is put off with a pop sound when a candle is exposed to this gas. The metal can be ____.

To determine the metal, we need to consider the properties described in the question.

First, the metal floats in water, indicating that it is less dense than water. This property eliminates iron as an option since iron is denser than water and would sink.

Next, the gas evolved from the metal extinguishes a burning candle with a pop sound. This suggests that the gas is likely flammable and reactive.

Based on these observations, the metal can be either potassium, lithium, or magnesium. These metals are known to react with water, producing hydrogen gas, which is flammable.

Therefore, the correct answer is either a. potassium, b. lithium, or d. magnesium.

When a metal is put in water it starts floating and some gas is evolved from it without any fire. A burning candle is put off with a pop sound when a candle is exposed to this gas. The metal can be ____ .a. potassiumb. lithiumc. irond. magnesium

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