Molecular Formula

Q. What is the molecular formula of sodium chloride?

1. Ncl
2. nacl
3. Nacl
4. NaCl

Q. What is the difference between symbol and formula?

Q. Covalent compounds are generally :

1. Ionize in water
2. Hydrolyze in water
3. Soluble in water
4. Insoluble in water

Q. (i) What are the types of molecules? Explain with examples.
(ii) Write the names of any five compounds that are used in our daily life.

Q. Statement I: Chemical formula represents the elements present in a compound.

Statement II: The chemical symbol $\text{CO}$ and $\text{Co}$ represent the same substance.

1. Statement I is true but II is false
2. Statement I is false but II is true
3. Both statements are true
4. Both statements are false

Q.

chemical formula of alum?

Q. Write the chemical formula of the following:
(i) Sulphuric Acid (ii) Sodium Carbonate (iii) Nitric Acid (iv) Phosphoric Acid (v) Silver Nitrate (vi) Aluminium Hydroxide (vii) Sodium Bicarbonate
(viii) Ammonium Chloride (ix) Hydrochloric Acid (x) Calcium Hydroxide (xi) Milk of Magnesia (Magnesium Hydroxide)

Q.

Which is more hard acids or bases

Q. what is the formula for sodium borate, sodium meta borate? and how to decide the formula of of any meta compound and a normal compound

Q. Write down symbols or formulae for the following:
(a) an atom of sodium
(b) a molecule of nitrogen
(c) a molecule of oxygen
(d) a molecule of water
(e) a molecule of iron oxide
(f) a molecule of carbon dioxide
(g) a molecule of copper sulphide
(h) a molecule of calcium oxide
(i) a molecule of calcium chloride

Q.

If the chemical formula of Water is H2O which is in the liquid form what is chemical formula for Water Vapour which is in the Gas form?

Q. Fill in the blanks.
H₂O is the _______________ of water. It also represents _______________ molecule of water. There are ________________ atoms of hydrogen and _______________ atom of oxygen in H₂O. 2H₂O represents _________________ molecules of water. There are _____________ atoms of hydrogen and _______________ atoms of oxygen in 2H₂O.

Q. Fill in the blanks choosing the correct word from those given below.
one, two, carbon, oxygen, compound(s), element(s), gas, symbol, formula, atom(s), molecule(s)
CO₂ is the _______________ of a gas called carbon dioxide, It represents one ___________ of the _______________. This compound is made up of ______________and _______________. Each molecule contains one ______________ of carbon and _________________of _______________. The _____________ C represents one ______________ of while the _______________ O represents one ________________ of ______________.

Q. can anyone provide chemical formula of uric acid

Q. Match the compounds in column I to their formulae in column II.

Column I	Column II
A. sodium sulphide	i. Na2SO4
B. magnesium sulphide	ii. MgSO4
C. sodium sulphate	iii. Na2S
D. magnesium sulphate	iv. MgS

(a) A-i; B-ii; C-iii; D-iv
(b) A-iii; B-iv; C-i; D-ii
(c) A-iv; B-iii; C-ii; D-i
(d) A-ii; B-i; C-iv; D-iii