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प्रश्न
Give a reason why –
Ozone is considered triatomic, but phosphorus a tetratomic molecule.
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उत्तर
Ozone is considered triatomic because it is composed of three atoms while phosphorous is composed of four elements therefore it considered as tetratomic molecule.
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संबंधित प्रश्न
Write down the name of a compound represented by the following formula:
K2SO4
Write down the name of a compound represented by the following formula:
CaCl2
Write down the name of a compound represented by the following formula:
KNO3
Write down the name of a compound represented by the following formula:
CaCO3
State the term.
The number of atoms present in a molecule of an element _________
Define: Atomic number
What is meant by atomicity ? Explain with two examples.
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
One of the forms of a naturally occurring solid compound P is usually used for making the floors of houses. On adding a few drops of dilute hydrochloric acid to P, brisk effervescence are produced. When 50 g of reactant P was heated strongly, than 22 g of a gas Q and 28 g of a solid R were produced as products. Gas Q is the same which produced brisk effervescence on adding dilute HCl to P. Gas Q is said to cause global warming whereas solid R is used for white-washing.
- What is (i) solid P (ii) gas Q, and (iii) solid R.
- What is the total mass of Q and R obtained from 50 g of P ?
- How does the total mass of Q and R formed compare with the mass of P taken ?
- What conclusion do you get from the comparison of masses of products and reactant ?
- Which law of chemical combination is illustrated by the example given in this problem ?
Molecular compounds are usually formed by the combination between :
An element X forms the following compounds with hydrogen, carbon and oxygen :
H2X, CX2, XO2, XO3
State the three valencies of element X which are illustrated by these compounds.
Correct the following statement:
A molecule of sulphur is monoatomic.
Give one example of a polyatomic molecule.
Give a reason why –
Helium is considered monoatomic, but hydrogen a diatomic molecule.
State the atomicity of the following:
Oxygen
State the atomicity of the following:
Chlorine
The Atomicity of phosphorous is ______
Give any two examples for heterodiatomic molecules.
Derive the relationship between Relative molecular mass and Vapour density.
Which of the following contains maximum number of molecules?
Write any two classifications of a molecule.
