मराठी

A White Solid Which Evolves Two Colourless Gases Which on Cooling Combine and Condense on the Cooler Parts of the Test Tube. - Chemistry

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प्रश्न

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 white solid which evolves two colourless gases which on cooling combine and condense on the cooler parts of the test tube.

एका वाक्यात उत्तर

उत्तर

Ammonium chloride [NH4Cl].

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पाठ 9: Practical Chemistry - Additional Questions

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विराफ जे. दलाल Simplified ICSE Chemistry [English] Class 9
पाठ 9 Practical Chemistry
Additional Questions | Q 2.3

संबंधित प्रश्‍न

Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.


State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .


Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.

Sodium chloride


Give reason for the following:

Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.


When hydrogen burns in oxygen, water is formed; when electricity is passed through water, hydrogen and oxygen are given out. Name the type of chemical change involved in the two cases.


What do you understand by 'chemical reaction'?


Name: Gas with rotten egg smell. 


State the original colour of the following substance and colour of residue obtained after heating.

Lead nitrate


What do you observe when Cobalt chloride paper is introduced in water vapour.


Write your observation and a balanced equation in the case of the following substances being heated.

Ammonium dichromate.


Give a word equation for the following reaction.

Two solids which combine on heating, to give a liquid.


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.


Give a balanced equation for the conversion of an ammonium salt to a basic gas.


Explain with the help of balanced equations, how precipitation reactions are used for identifying the positive radicals in three different salts, each having a different cation [positive ion].


The percentage composition of Nitrogen in Ureas is ______.


Iron benches kept in lawns and gardens get____________. It is a _________ change because a new _________ is formed.


If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

Do you think the formation of rust from iron is a chemical change?


______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.


Iron and rust are the same substances.


Write a note on the following:

Curdling of milk


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