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प्रश्न
Write the missing reactants and products and balance the equations.
NaOH + ............... `→` NaCI + ...................
उत्तर
NaOH + HCI `→` NaCI + `H_2O`
APPEARS IN
संबंधित प्रश्न
How do the following help in bringing about a chemical change?
light.
Complete and balance the following chemical equations:
`"H"_2"S"` + `"CI"_2` `→`
Complete and balance the following chemical equations:
Zn + `"H"_2"SO"_4` `→`
(dil)
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Miscible liquids having slightly different boiling points can be separated by the
- evaporation
- distillation
- fractional distillation
- sedimentation
FILL IN THE BLANK
In a ............ change, new substances are formed.
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
How is precipitate formation in a chemical reaction indicated?
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State the conditions necessary for a chemical change or reaction.
Give an example of the following chemical change.
Two solids combine to form a liquid
Give an example of the following chemical change.
A reaction where colour change is noticed
State the original colour of the following substance and colour of residue obtained after heating.
Ammonium dichromate
State the original colour of the following substance and colour of residue obtained after heating.
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Give a chemical test to distinguish between the following gases.
NH3 and SO2
Give examples of exothermic reactions i.e. heat evolved in each of the following:
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(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.
Give a word equation for the following reaction.
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Give a word equation for the following reaction.
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Give balanced equation for the following conversion affected by heat alone on the substance:
Hydrated copper sulphate to sulphur dioxide
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\[\ce{Ag->Ag+}\]
State the following reaction represent oxidation or reduction.
\[\ce{H->H+}\]
Photosynthesis is a chemical reaction that takes place in the presence of ______.
Discuss how acid rain occurs due to emission of smoke from vehicles and industries?
Chemical change is a temporary change.
Which of the following statement is incorrect for a chemical reaction?
Give an example of a chemical reaction for each of the following situations:
A change in colour is observed.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
What changes do you expect?
Write the effects of chemical reactions.
