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प्रश्न
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
पर्याय
True
False
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उत्तर
False
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संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Iron and rust are the same substances.
Complete and balance the following chemical equations:
N2 + O2 →
Fill in the blank.
The formation of gas bubbles in a liquid during a reaction is called ......................
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
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
Define chemical reaction.
State four conditions necessary for a chemical reaction to take place.
State what you would observe when the following substance is heated in a glass test tube red lead.
State the type of reactions for the following represent and balance the ones that are not balanced.
NaOH + HCl → NaCl + H2O
Give an example of the following chemical changes.
A reaction involving
(i) Change of state
(ii) formation of precipitate
What do you observe when H2S is passed through a lead nitrate solution.
Give a chemical test to distinguish between the following gases.
HCl and H2S
Give a chemical test to distinguish between the following gases.
SO2 and Cl2
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A coloured substance which leaves a black residue and evolves two gases one of which is acidic and coloured and the other neutral and colourless.
State the following reaction represent oxidation or reduction.
\[\ce{Cu++->Cu}\]
Give a balanced equation for the conversion of an ammonium salt to a basic gas.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Lead nitrate.
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
Which of the following is/are true when milk changes into curd?
- Its state is changed from liquid to semi solid.
- It changes colour.
- It changes taste.
- The change cannot be reversed.
Choose the correct option from below:
Galvanization is a process in which ______ is coated as a layer of iron.
