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प्रश्न
Which among the following are physical or chemical change?
Sublimation of solid ammonium chloride
उत्तर
Physical
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संबंधित प्रश्न
The chemical formula for rust is.............. .
The process of respiration is:
(a) an oxidation reaction which is endothermic
(b) a reduction reaction which is exothermic
(c) a combination reaction which is endothermic
(d) an oxidation reaction which is exothermic
Why zinc and aluminium are considered to have a unique nature. Give balanced equations to support your answer.
Is it essential that oxidation and reduction must occur side by side in a chemical reaction? Explain
State, giving reason, whether the substances printed in bold letters have been oxidized or reduced.
Cl2 + H2S → 2HCl + S
Name:
a liquid that is an oxidizing agent as well as a reducing agent.
Oxidising agents are also called as ______ because they remove electrons form other substances.
Identify the oxidising agent (oxidant) in the following reactions
`"V"_2"O"_5 + 5"Ca" -> 2"V" + 5"CaO"`
The tendency of atoms to have eight electrons in the outer shell is known as ______.
Find the oxidation number of the element in the following compound.
Ca in CaH2
