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प्रश्न
Two elements sometimes can form more than one compound.
विकल्प
True
False
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उत्तर
True
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संबंधित प्रश्न
Write down the name of a compound represented by the following formula:
Al2(SO4)3
Write down the name of a compound represented by the following formula:
CaCO3
Give the name of the element present in the following compound:
Hydrogen bromide
Give the name of the element present in the following compound:
Baking powder
Give the name of the element present in the following compound:
Potassium sulphate
Calculate the number of molecules of sulphur (S8) present in 16 g of solid sulphur.
State the term.
The number of atoms present in a molecule of an element _________
Define: Atomic number
Define: Atomic number
What is the atomicity of the following ?
- Oxygen
- Ozone
- Neon
- Sulphur
- Phosphorus
- Sodium
Write the formulae of the following compounds. Also name the elements present in them.
- Water
- Ammonia
- Methane
- Sulphur dioxide
- Ethanol
In what form does oxygen gas occur in nature ?
In what form do noble gases occur in nature?
What do the following denote ?
- N
- 2N
- N2
- 2N2
What is the difference between the molecule of an element and the molecule of a compound? Give one example of each.
Molecular compounds are usually formed by the combination between :
An element A forms an oxide A2O5.
What is the valency of element A ?
Calculate the mass of 3.011 × 1024 atoms of carbon.
State the main points of the contradiction of Dalton’s atomic theory by the Modern Atomic Theory.
State the atomicity of the following:
Chlorine
State true of false. If false, give the correct statement.
NaCl represents one molecule of sodium chloride.
Which of the following is a triatomic molecule?
Define: Atomicity.
Give any two examples for heterodiatomic molecules.
