The metal calcium upon reaction with water forms bubbles of hydrogen gas. These gas bubbles stick to the surface of the metal making the metal to ___ on the water.

produce flames

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float

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melt

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vigorously react

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Solution

The correct option is B
float

A metal reacts with water to give metal hydroxide and hydrogen gas. In this case, calcium reacts less vigorously with water to form hydrogen gas. The metals starts floating because the bubbles of hydrogen gas formed, stick to the surface of the metal.

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Similar questions

Q. The metal Calcium upon reaction with water forms bubbles of hydrogen gas. These gas bubbles stick to the surface of the metal making the metal to

___

on water. Identify the correct option to fill in the blank.

The metal calcium upon reaction with water forms bubbles of hydrogen gas. These gas bubbles stick to the surface of the metal making the metal to ___ on the water. Identify the correct option to fill in the bank.

Q. Assertion :Calcium floats over water during the reaction with water. Reason: Calcium reacts with water less vigorously so that the heat evolved is not sufficient for the hydrogen formed, to catch fire. The bubbles of hydrogen gas formed stick to the surface of the water calcium

Q. What happens when calcium is treated with water?
(i) It does not react with water
(ii) It reacts violently with water
(iii) It reacts less violently with water
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium

	Appearance	Reaction with dilute $H C l$	Reaction with dilute $H N O_{3}$
Unknown metal #1	Dull gray solid with white oxide coating	Dissolved with bubbles of clear gas	Dissolved with bubbles of clear gas
Unknown metal #2	Solid; lustrous, smooth silver-gray surface	No reaction	Dissolved with bubbles of orange gas

Identify the orange gas produced on the addition of dilute

H N O_{3}

to unknown metal #2.

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The metal calcium upon reaction with water forms bubbles of hydrogen gas. These gas bubbles stick to the surface of the metal making the metal to ___ on the water.

The correct option is B float A metal reacts with water to give metal hydroxide and hydrogen gas. In this case, calcium reacts less vigorously with water to form hydrogen gas. The metals starts floating because the bubbles of hydrogen gas formed, stick to the surface of the metal.

The correct option is B
float

A metal reacts with water to give metal hydroxide and hydrogen gas. In this case, calcium reacts less vigorously with water to form hydrogen gas. The metals starts floating because the bubbles of hydrogen gas formed, stick to the surface of the metal.