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10th CBSE
IMPORTANT
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Why cannot a chemical change be normally reversed?

Important Questions on Chemical Reactions And Equations

MEDIUM
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 1 - Chemical Reactions And Equations>EXERCISE>Q 10
Why it is necessary to balance a chemical equation ?
EASY
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 1 - Chemical Reactions And Equations>EXERCISE>Q 10
Why do diamond and graphite, the two allotropic forms of carbon, evolve different amounts of heat on combustion?
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 1 - Chemical Reactions And Equations>EXERCISE>Q 10
Why do milkiness disappear when carbon dioxide is passed through lime water in excess?
EASY
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 1 - Chemical Reactions And Equations>EXERCISE>Q 10
Can rusting of iron take place in distilled water?
EASY
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 1 - Chemical Reactions And Equations>EXERCISE>Q 1

C6H12O6aq+6O2g→XCO2g+6H2Ol+Energy

The value of X in the balance chemical equation is:

EASY
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 1 - Chemical Reactions And Equations>EXERCISE>Q 2
Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is:
EASY
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 1 - Chemical Reactions And Equations>EXERCISE>Q 3
In the given balanced equation, 2Als+6H+aq→2Al3+aq+3H2g, when two moles of Als completely react, then the total number of moles of electrons transferred from Als to H+aq is
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 1 - Chemical Reactions And Equations>EXERCISE>Q 4

Among the following, the number of underlined elements having +5 oxidation state are:

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