Which on mixing with water gives a hissing sound and becomes very hard?

Whenever we add quicklime

quicklime

Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room temperature.

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Calcium oxide - Wikipedia

or calcium oxide in water a hissing sound is produced. The chemical reaction can be written as : CaO+H2O→Ca(OH)2. We can see that calcium hydroxide is formed in this reaction. Calcium hydroxide is also known as slaked lime.

When dissolved in water what is the hissing sound?

Lime stone gives hissing sound when dissolved in HO. hope it helps you.

Does calcium make a hissing sound in water?

WHY IS THERE A HISSING SOUND WHEN CALCIUM OXIDE REACTS WITH WATER? Reaction of calcium oxide and water yields calcium hydroxide and energy. The reaction is exothermic in nature. That is why a hissing sound is produced due to the release of considerable amount of energy.

Which gas makes a hissing sound?

Answer is Carbon dioxide gas. During a chemical reaction, carbon dioxide is released which escapes through bubbles making a hissing sound.

What hissing sound comes out in which reaction?

The reaction between calcium oxide and water is highly exothermic in nature dur to which heat is produced and thus hissing sound we hear. Answer: This reaction is a highly exothermic reaction.

Repair a Toilet that continuously runs water (makes a "Hissing" sound)

Does sodium make a hissing sound in water?

Sodium reacts with water forming Sodium hydroxide and liberates hydrogen gas producing a hissing sound.

What happens when quick lime react with water?

What happens when quicklime is added to water? When quicklime is added to water, it forms slaked lime along with the evolution of heat. There will be a rise in the temperature of the bucket. Calcium oxide reacts with water to form calcium hydroxide, also called slaked lime.

Why does sodium produce a hissing sound?

Answer Text:

- A hissing sound is produced; due to production of hydrogen gas; - It vigorously melts into a silvery ball then disappears because reaction between water and sodium is exothermic (produces heat).

What produces when sodium reacts with water?

Reason : Sodium reacts with water and produces hydrogen gas.

When sodium reacts with water what does it produce?

In what way and in what form does sodium react with water? A colourless solution is formed, consisting of strongly alkalic sodium hydroxide (caustic soda) and hydrogen gas. This is an exothermic reaction. Sodium metal is heated and may ignite and burn with a characteristic orange flame.

How does copper react with water?

A high level of copper in your drinking water will leave a metallic or bitter taste. This water may not be safe to drink and you should contact your drinking water provider or have the water professionally tested. A low level of copper usually leaves a green/blue stain on taps, hand basins showers etc.

Which among the following gives hissing sound when dissolved into H2O?

Whenever we add quicklime or calcium oxide in water a hissing sound is produced. The chemical reaction can be written as : CaO+H2O→Ca(OH)2. We can see that calcium hydroxide is formed in this reaction. Calcium hydroxide is also known as slaked lime.

Why do we observe hissing sound when quicklime react with water?

Reaction of calcium oxide and water yields calcium hydroxide and energy. The reaction is exothermic in nature. That is why a hissing sound is produced due to the release of considerable amount of energy.

How does calcium react with water?

In the following demonstration, a chunk of calcium metal is dropped into a beaker of distilled water. After a second or so, the calcium metal begins to bubble vigorously as it reacts with the water, producing hydrogen gas, and a cloudy white precipitate of calcium hydroxide.

How does Sulphur react with water?

BUT, SO2 + H2O ---> H2SO3.

Does iron react with water?

(i) Iron does not react with water directly. Red hot iron reacts with steam to produce triferric tetra-oxide and hydrogen gas.

Which element reacts with water?

The alkali metals (Li, Na, K, Rb, Cs, and Fr) are the most reactive metals in the periodic table - they all react vigorously or even explosively with cold water, resulting in the displacement of hydrogen.

What is the reaction of lithium with water?

Lithium reacts intensely with water, forming lithium hydroxide and highly flammable hydrogen. The colourless solution is highly alkalic.

What happens when Cesium reacts with water?

When caesium makes contact with water, it reacts very rapidly, and forms a colourless solution of caesium hydroxide (CsOH) and hydrogen gas (H2). This reaction is so fast, that if you tried pouring water into a test tube containing caesium (don't do it), the glass container would shatter all over the place.

What happens when you mix calcium oxide with water?

Calcium oxide reacts vigorously with water to produce slaked lime (calcium hydroxide) releasing a large amount of heat. In this reaction, calcium oxide and water combine to form a single product, calcium hydroxide.

How does limestone react with water?

Limestone (CaCO₃) reacts with hydrogen ions in water. These are always present in water, since water undergoes autoprotolysis: H₂O(l) = H⁺(aq) + OH^-(aq) The more acidic the water is, the more limestone will react, and erode.

Is slaked lime a precipitate?

From the above reaction we can say that, when quick lime is added to water then, formation of slaked lime precipitate takes place. Hence, we can now conclude that option B is the correct option.

Does Zinc react with water?

Zinc does not react directly with water. It depends on the temperature of both, the zinc metal and the water. Under normal conditions, zinc does not react with water. When zinc reacts with steam it produces zinc oxide and releases hydrogen gas.