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प्रश्न
Which among the following are physical or chemical change?
Burning of Liquefied Petroleum Gas (LPG)
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उत्तर
Chemical
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संबंधित प्रश्न
A shiny brown-coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black-colored compound formed.
Identify in the following reaction (a) the substance oxidised, and (b) the substance reduced:
\[\ce{ZnO + C -> Zn + CO}\]
The addition of oxygen to a substance is called ______ whereas removal of oxygen is called ______.
The addition of hydrogen to a substance is called ______ whereas removal of hydrogen is called ______.
Give one example of an oxidation-reduction reaction which is also a displacement reaction.
Identify the substances that are oxidised and the substances that are reduced in the following reaction.
\[\ce{CuO_{(s)} + H2_{(g)} -> Cu_{(s)} + H2O_{(l)}}\]
Give the general group study of hydrogen with reference to
reducing power
Compare hydrogen and halogens on the basis of:
reaction with oxygen
Describe briefly the ionic concept of oxidation and reduction. Give an equation to illustrate.
State whether the following conversion is oxidation or reduction:
2Cl- - e-→ Cl2
Complete and balance the following equation:
\[\ce{K + H2O -> }\]________+ ________
State the condition and give balanced equation for the conversion of coke to water gas.
Identify the reducing agent in the following reactions
`2"H"_2 + "O"_2 -> 2"H"_2"O"`
Identify the oxidising agent (oxidant) in the following reactions
`3"Fe" + 4"H"_2"O" -> "Fe"_3"O"_4 + 4"H"_2`
The tendency of atoms to have eight electrons in the outer shell is known as ______.
The tarnishing of metals is due to the formation of ______.
What are redox reactions? Give examples.
Find the oxidation number of the element in the following compound.
Zn in ZnSO4
Metals are good ______.
