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When a colourless compound X reacts with caustic soda, white precipitate of metal hydroxide is formed along with sodium nitrate. The precipitate formed is:

How do the rockets burn or ingnite fuel in it,in space and accelerate?

In a solution,there is homogeneity at the particle level..Means??With an example

A ball is floating in a liquid in a container with its 25% of volume outside the liquid. If the air of the container is pumped out then what % of volume of ball will be outside the liquid?

Is fire matter ?

Is ink a colloid or a solution?

importance of sublimation?

What is the correct dm definition of colloidal solution?

Which of the following terms are not related to colloids?

Among $K{O}_2,N{a}_{2}O$ and $Ba{O}_2$ unpaired electron(s) is/are present in:

Combustion is a reaction in which a substance reacts with-

valency of polyatomic ions

Germination of seed can be classified as__ change.

How can we separate the mixture of salt,sand and sulphur .

Burning of candle accompanies both physical and chemical changes identify the strangers give another example for familiar process in which both the chemical and physical changes take place

A material containing two or more substances is known as a mixture. Mixtures can be classified as homogeneous and heterogeneous depending upon the composition of substances present.

-A mixture is said to be homogeneous if its

Which solvent can be used to separate the mixture of salt and chalk powder?

The maximum number of electrons that can be accommodated in an orbit is given by the formula _______ where n is the number of orbit.

The formula weight of ________________ is 180u.

In laboratory preparation of hydrogen, impurities of arsine and phosphine can be removed by passing it through which of the following solution?

A wet handkerchief is placed on the forehead of a person suffering from high fever. Why? Why is alcohol preferred over water? [3 MARKS]

How many $H_{2}O$ should be added to the RHS of the following equation to balance number of oxygen atoms on the left ?

$6F{e}^{2+}+C{r}_2{O}_7^{2-}+14H^{+}⟶6F{e}^{3+}+2C{r}^{3+}+$ ___________

When atoms are bombarded with alpha particles, only a few in million suffer deflection, others pass out undeflected. This is because

Why was mole concept introduced in writing a chemical reaction equation? Does the number of grams differ from one mole to another mole?
[3 MARKS]

Identify X in the following reaction
X+ Acid - Salt + Water.

Difference Between electrovalent and covalent bonds

Which of the following chemicals cause ozone layer depletion?

When two ice cubes are pressed tightly we find that two ice cubes join together. Why? (5 marks) .

A sample containing 85g of NH₃ is decomposed into Nitrogen and Hydrogen. The total amount of Nitrogen and Hydrogen present in 85g of the sample respectively are:

What is colloidal solution

Give reason :the latent heat of vaporisation of steam is more than that of boiling point .explain

Read the following statements and choose the correct statements.

A) Hydrogen has high I.P like halogens.

B) Hydrogen atom tends to form gaseous $H^{+}$ ion like alkali metals easily.

C) Like halogens, Hydrogen gains an electron to acquire the nearest inert gas configuration.

D) In electrolysis, $H_2$ is always liberated at cathode.

What is the significance of the number of protons found in the atoms of different elements ?

Convert into mole 12 gram of Oxygen gas

Respected BYJUS faculty,

My name is VANDITA YADAV and I am student of BYJUS 9th grade I. C. S. E

How does ice at 0° C has greater cooling effect than water at 0°C?

Thank you.

Name a chemical fertilizer which can supply potassium as well as nitrogen.

Write the IUPAC name of the compound CH₂=CH-CN:

Explain

(a) diffusion in solids

(b) diffusion in liquid

(c) diffusion in gas

What are the causes of acid rain ?