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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Write True Or False : When Potassium Iodide Solution is Added to Lead Acetate Solution a Red Precipitate is Formed. - Chemistry

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प्रश्न

Write true or false :

When potassium iodide solution is added to lead acetate solution a red precipitate is formed.

पर्याय

  • True

  • False

MCQ
चूक किंवा बरोबर

उत्तर

False

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Language of Chemistry - Objective type questions

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 5 Language of Chemistry
Objective type questions | Q 2.3

संबंधित प्रश्‍न

State whether the following statement is true or false. In case a statement is false, write the corrected statement.

Iron pipes coated with zinc do not get rusted easily.


How do the following help in bringing about a chemical change?

light.


Define; catalyst.


Fill in the blanK

 A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.


FILL IN THE BLANK

The new substances formed during a chemical reaction are called the ..................


Write true or false  :
No new substance is formed during a chemical reaction.


Balancing a chemical equation is based on


Name the type of chemical reaction shown by the following equation:

2Mg + O2 → 2MgO


Name the type of chemical reaction shown by the following equation:

Fe + CuSO4 → FeSO4 + Cu


A solution of a substance ‘X’ is used for white washing Name the substance ‘X’ and write its formula.


Out of sodium and sulphur which is a metal? Explain its reaction with the oxygen.


Complete the statement by filling the gaps using 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)

The spoiling of food is a chemical change which is recognized from the generation of certain ______ due to it.


Give an example of a reaction where the following are involved

Electricity


Give an example of a reaction where the following are involved:

Close contact


What do you observe when Cl2 is passed through potassium iodide (KI) solution.


Give a chemical test to distinguish between the following gases. 

CO2 and SO2


Distinguish by heating the following in dry test tubs.

Zinc nitrate and copper nitrate.


Give a word equation for the following reaction.

A compound which on heating shows – colour change from brown to yellow.


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 on strong heating a black residue and evolves two colourless gases one of which is acidic and the other neutral.


Give balanced equation for the following conversion affected by heat alone on the substance:

Hydrated copper sulphate to sulphur dioxide


Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.


Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Zinc carbonate.


What happens when cane sugar is strongly heated? Mention any two changes in it.


Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.


Silver articles turning black: ______:: Boiling of H2O: physical change ______.


Melting of wax is a change where a solid changes to a liquid state. Give one more such change which you observe in your surroundings


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.

Write a word equation for the chemical change, if any.


Which is used as a catalyst during the process of hydrogenation of oils?


How would you show that the settling of curd is a chemical change?


Write the effects of chemical reactions.


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