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प्रश्न
What do you observe? When
Barium chloride is added to sodium sulphate solution
उत्तर
A white insoluble precipitate of barium sulphate is formed.
APPEARS IN
संबंधित प्रश्न
Changes in which new substances are formed are called ______ changes.
Complete and balance the following chemical equations:
Fe `"SO"_4` + NaOH `→`
(aq.) (aq.)
Complete and balance the following chemical equations:
\[\ce{Pb(NO3)2->[heat]}\] _________
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction is a chemical reaction in which there is
- removal of hydrogen
- removal of oxygen
- addition of oxygen
- none of these
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
Write true or false :
Hydrogen sulphide has rotten egg smell .
State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .
Name the type of chemical reaction shown by the following equation:
NaOH + HCl → NaCl + H2O
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Water
Give an example of a reaction where the following are involved
Heat
Explain,giving one example of the following chemical changes:
Reversible reaction
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc nitrate to nitrogen dioxide
Circle the odd one out. Give reason for your choice
______ is not a chemical change.
Assertion: The formation of iron oxide from iron is a chemical change.
Reason: For the rust to form from iron, it must be exposed to air and water.
Which of the following is not an “element + element → compound” type reaction?
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 is ______.
Write a note on the following:
Curdling of milk
