मराठी

State of the following formula of a compound is incorrect. Incorrectly write the correct formula. NaCO3

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प्रश्न

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

NaCO3

एका वाक्यात उत्तर
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उत्तर

NaCO3

Correct formula – Na2CO3

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पाठ 1: The Language of Chemistry - For Additional High Order Thinking Questions [पृष्ठ १८]

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विराफ जे. दलाल Simplified ICSE Chemistry [English] Class 9
पाठ 1 The Language of Chemistry
For Additional High Order Thinking Questions | Q 3. 2. D. | पृष्ठ १८

संबंधित प्रश्‍न

Write the chemical formula of the Copper nitrate.


What is meant by a chemical formula ? Write the formulae of one element and one compound.


The element having atomicity 'four' is most likely to be :


Name the elements water is made of. What are the valencies of these elements ? Work out the chemical
formula for water.


Work out the formula for sulphur dioxide. (Valencies : S = 4 ; O = 2)


Give the formulae of the compounds formed from the following sets of elements :

  1. calcium and fluorine
  2. hydrogen and sulphur
  3. nitrogen and hydrogen
  4. carbon and chlorine
  5. sodium and oxygen
  6. carbon and oxygen

An element Y has a valency of 4. Write the formula for its :

  1. chloride
  2. oxide
  3. sulphate
  4. carbonate
  5. nitrate

The formula of the nitride of a metal X is XN, state the formula of its hydroxide.


Write the formula of the following compound:

Calcium nitrate


Write the formula of the following compound:

Magnesium oxide


Write the formula of the following compound:

Zinc nitrate


Write the formula of the following compound:

Zinc oxide


Write the formula of the following compound:

Copper [I] oxide


Write the formula of the following compound:

Iron [II] oxide


Write the formula of the following compound:

Iron [III] hydroxide


Define the term Relative atomic mass. State why indirect methods are utilised to determine the absolute mass of an atom. Explain in brief the indirect method used.


State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

Mg(SO4)2


Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (You may use appendix-III).

  1. Ammonia
  2. Carbon monoxide
  3. (Hydrogen chloride
  4. Aluminium fluoride
  5. Magnesium sulphide

There are ______ hydrogen atoms in water molecule.


Play a game for writing formula.

Example 1: Make placards with symbols and valencies of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should criss-cross their valencies to form the formula of a compound.


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