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प्रश्न
Explain the term reactant and product giving examples.
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उत्तर
Product: the substance which forms as a result of chemical reaction is called products.
The new substance produced as a result of chemical reaction is called products.
For example: When two sodium atoms react with two chlorine atoms(reactants), they give a completely new compound (product) i.e. sodium chloride (two atoms).
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संबंधित प्रश्न
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
Complete and balance the following chemical equations:
`"H"_2"S"` + `"CI"_2` `→`
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Compounds, which in their molten state allow an electric current to pass through them are called
- electrolytes
- non-electrolytes
- non-conductors
- none of these
FILL IN THE BLANK
Distillation is a method of obtaining pure ............. from a solution.
How is a strong electrolyte different from a weak electrolyte?
State what you would observe when the following substance is heated in a glass test tube red lead.
Complete and balance the following reaction:
Pb(NO3)2 + KI →
State the original colour of the following substance and colour of residue obtained after heating.
Zinc carbonate
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
Give a word equation for the following reaction.
Two solids which combine on heating, to give a liquid.
Give balanced equation for the following conversion affected by heat alone on the substance:
Hydrated copper sulphate to sulphur dioxide
Complete the table given below.
| Addition of dil. H2SO4 to zinc | Test for gas evolved |
Photosynthesis is a chemical reaction that takes place in the presence of ______.
Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.
Two chemical species X and Y combine together to form a product P which contains both X and Y
\[\ce{X + Y -> P}\]
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
(iv) P has a fixed composition
Beating an egg to make a cake is a ______.
When magnesium is burnt in the air, a new substance is formed which is ______.
Explain how the painting of an iron gate prevents it from rusting.
Photosynthesis is a chemical charge. Justify your answer.
______ is the chemical name of rust.
