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प्रश्न
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
विकल्प
True
False
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उत्तर
False
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संबंधित प्रश्न
Complete and balance the following chemical equations:
Zn + `"H"_2"SO"_4` `→`
(dil)
Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.
\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]
What do you observe when iron nail is kept in copper sulphate solution for sometime.
Explain the type of reactions on the basis of the direction of reaction.
Balancing a chemical equation is based on
Complete the statement by filling the gap using an appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
Multiple choice:
Which of the following is not a characteristic of a chemical change?
Give one example electrochemical reaction.
Complete and balance the following reaction:
NaCl(aq) + AgNO3(aq) →
What is observed in performing the following :
| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | ||||
| Apply a burning splint to the gas | ||||
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas |
Give a chemical test to distinguish between the following gases.
HCl and Cl2
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium dichromate.
Give balanced equation for the following conversion affected by heat alone on the substance:
Ammonium dichromate to nitrogen
______ gas causes tears in our eyes while cutting onions.
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
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.
Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.
Vanaspati is obtained from vegetable oils by the addition of ______ to the oils.
Heat may evolve or be absorbed during a ______ change.
Why is spoiling food a chemical change?
