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Question
Name the following:
An acid whose formula is ‘H2CO3’.
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Solution
Carbonic acid
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RELATED QUESTIONS
The symbol of a metal element which is used in making thermometers is :
The Latin language name of an element is natrium. The English name of this element is :
Match the non-metallic elements – with their correct symbols. Non-metallic elements are:
| Non-Metallic elements | Symbol |
| (a) Carbon | (1) O |
| (b) Chlorine | (2) I |
| (c) Oxygen | (3) Si |
| (d) Phosphorus | (4) C |
| (e) Hydrogen | (5) Cl |
| (f) Nitrogen | (6) P |
| (g) Iodine | (7) F |
| (h) Bromine | (8) H |
| (i) Fluorine | (9) S |
| (j) Silicon | (10) Br |
| (k) Sulphur | (11) N |
Give the names and symbols of the first twenty elements of the periodic table.
State the type of element for the following:
potassium
Give the symbol of the following element:
Boron
State the type of element for the following:
Sodium
Write the chemical formula of the following:
calcium sulphide
State the valency of the following metallic element and write symbol with the valency
Potassium
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Nitrate
