Write the chemical formula of Sodium hydrogen carbonate ${\mathrm{Na}}_{\mathrm{X}}{\mathrm{HCO}}_{\mathrm{y}}$.

The value of x and y in the formula can be-

A. x = 1, y = 3

B. x = 1, y = 2

C. x = 2, y = 3

"Enter your correct answer as A, B or C."

Write the chemical formula of the following compound Ammonium sulphate ${\left({\mathrm{NH}}_4\right)}_{\mathrm{x}}{\mathrm{SO}}_{\mathrm{y}}$

The value of x and y in the formula can be-

A. x = 1, y = 2

B. x = 2, y = 4

C. x = 4, y = 2

"Enter your correct answer as A, B or C."

Write the chemical formula of Aluminium chloride ${\mathrm{Al}}_{\mathrm{x}}{\mathrm{Cl}}_{\mathrm{y}}$.

The value of x and y in the formula can be-

A. x = 1, y = 2

B. x = 2, y = 3

C. x = 1, y = 3

"Enter your correct answer as A, B or C."

Write the chemical formula of the following compound Zinc sulphate ${\mathrm{Zn}}_{\mathrm{x}}{\mathrm{SO}}_{\mathrm{y}}$.

The value of x and y in the formula can be-

A. x = 1, y = 2

B. x = 2, y = 4

C. x = 1, y = 4

"Enter your correct answer as A, B or C."

Explain the following term:

Symbol 

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Compound  

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Chemical Equation

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Limitation of a chemical equation.

Explain the following term:

Law of conservation of mass