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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Select the Correct Answer for the Following Options: the Gas Which Reacts with Oxygen to Give a Neutral Liquid. - Chemistry

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प्रश्न

Select the correct answer for the following options:

The gas which reacts with oxygen to give a neutral liquid.

पर्याय

  • Hydrogen 

  • Copper [II] oxide 

  • Oxygen

  • Copper [II] hydroxide 

  • Ammonia

MCQ

उत्तर

Ammonia

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पाठ 5: Language of Chemistry - Objective Type Questions

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विराफ जे. दलाल New Simplified Middle School Chemistry [English] Class 7
पाठ 5 Language of Chemistry
Objective Type Questions | Q 1.5

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. 


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

Condensation of steam is not a chemical change.


Define; catalyst.


FILL IN THE BLANK

In a double decomposition precipitation reaction both the reactants must be ............ soluble.


Define electrolysis.


True or false 

New substances are formed in a chemical change.


Define chemical reaction.


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

2Mg + O2 → 2MgO


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)

Electron ______ is complete in each hydrogen in a hydrogen molecule.


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

Water


Write the chemical reaction where the following changes are observed.

Precipitate is formed


Give reason for the following:

Silver nitrate solution is kept in coloured bottles.


Give reason for the following:

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


Give reason for the following:

Colourless concentrated sulphuric acid in a test tube changes to blue on adding a small piece of copper to it.


State the type of reactions for the following represent and balance the ones that are not balanced.

NaOH + HCl → NaCl + H2O


State the main characteristics of chemical reactions. Give at least one example in each case.


Define:
Electrochemical reaction
Give one example


Name the gases which Turn moist red litmus blue.


Name: A brown gas 


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

Zinc carbonate


Complete the table given below.

Addition of dil. H2SO4 to zinc  Test for gas evolved  

Give a suitable example with an equation to show the representation of a chemical reaction.


Complete the statement by filling in the blank with the correct word:

The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.


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


Give two examples for each of the following cases:

Chemical changes.


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.

Are these changes chemical in nature?


Vanaspati is obtained from vegetable oils by the addition of ______ to the oils.


Match the following:

  Column I   Column II
1. Burning of coal a. Rusting
2. Painting of a surface b. Evaporation
3. Dipping iron in the water c. Chemical change
4. Salt from seawater d. Prevention of rusting

______ is the chemical name of slaked lime.


Acid rain is a result of ______.


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