Symbols of Elements and Their Valencies
Trending Questions
Q.
The valency of calcium in calcium hydroxide is
3
1
4
2
Q.
The valency of calcium in calcium hydroxide is
Q. The chemical formula of aluminium chloride is:
- Al2Cl
- AlCl3
- Al3Cl
- Al2Cl3
Q. The valency of calcium in calcium hydroxide is ___ .
Q. The arrow pointing downwards (↓) along with a product represents a gaseous product, whereas the arrow pointing upwards (↑) represents the precipitate in a reaction.
- True
- False
Q. Write the following reaction in the form of a word equation:
Sodium hydroxide reacts with calcium bromide to form calcium hydroxide and sodium bromide.
In CaBr2 , determine the valency of calcium.
Sodium hydroxide reacts with calcium bromide to form calcium hydroxide and sodium bromide.
In CaBr2 , determine the valency of calcium.
- Sodium hydroxide + calcium bromide = Calcium hydroxide + sodium bromide; calcium; 1
- Sodium hydroxide + calcium bromide ↔ Calcium hydroxide + sodium bromide; calcium; 2
- Sodium hydroxide + calcium bromide → Calcium hydroxide + sodium bromide; calcium; 2
- Sodium hydroxide + calcium bromide → Calcium hydroxide + sodium bromide; potassium; 2
Q.
Which of the following are correct with respect to stability of an atom?
Fully filled outer orbit
Octet configuration
Fully filled outer orbit and octet configuration
None of these
Q. A word equation of a chemical reaction is a way to describe chemical reactions using the names of substances involved.
- True
- False
Q.
The valencies of aluminium and chlorine in the compound AlCl3 respectively are ______ and _____.
3, 1
3, 3
1, 3
1, 1
Q. Number of valence electrons present in a HClO4, HClO3, HClO2 respectively are:
- 26, 20, 14
- 32, 26, 20
- 36, 30, 24
- 28, 22, 16