मराठी
सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

Indicate which of the following statement is true and which is false: Nitric acid cannot be used to prepare hydrogen by its action on active metals.

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प्रश्न

Indicate which of the following statement is true and which is false:

Nitric acid cannot be used to prepare hydrogen by its action on active metals.

पर्याय

  • True

  • False

MCQ
चूक किंवा बरोबर
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उत्तर

This statement is True.

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Recognition and Identification of Gases
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पाठ 7: Hydrogen - Exercise [पृष्ठ ९८]

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सेलिना Concise Chemistry [English] Class 8 ICSE
पाठ 7 Hydrogen
Exercise | Q 2.3 | पृष्ठ ९८

संबंधित प्रश्‍न

Indicate which of the following statement is true and which is false: 

Zinc can liberate hydrogen from water, acid and alkali solution.


 Name the following:

 A metallic oxide which can be reduced into metal by hydrogen.


Name the chemicals required to prepare hydrogen gas in the laboratory.


Draw a neat and well-labelled diagram for the laboratory preparation of hydrogen.


How is hydrogen gas collected? Why?


Multiple Choice Question

 In metal activity series the more reactive metals are at


FILL IN THE BLANK

Sodium liberates hydrogen when treated with cold .............


TRUE \ FALSE

Lead reacts briskly with dilute hydrochloric acid to form hydrogen.


Give reason:

Apparatus for laboratory preparation of hydrogen should be airtight and away from a naked flame.


Give reason for the following:

Copper does not displace hydrogen from dilute hydrochloric acid, but zinc does.


Complete and balance the equation:

[Laboratory method]

By action of dilute acid on zinc

Zinc - Zn + 2HCl → _____ + _____ [g]


In the laboratory preparation of hydrogen from zinc and dil. acid. Give a reason for the following:

Hydrogen is not collected over air.


Name the following.

A gaseous reducing agent which is basic in nature.


Select the correct answer from the symbol in the bracket.

The element which forms a diatomic molecule.


The diagram represent the preparation and collection of hydrogen by a standard

laboratory method.


State what is added through the thistle funnel ‘Y’


The diagram represent the preparation and collection of hydrogen by a standard laboratory method.


State what difference will be seen if pure zinc is added in the distillation flask ‘X’ instead of granulated zinc.


The diagram represent the preparation and collection of hydrogen by a standard laboratory method.


Name a solution which absorbs the impurity – `"H"_2"S"`


The diagram represent the preparation and collection of hydrogen by a standard laboratory method.


State, why hydrogen is collected after all the air in the apparatus, is allowed to escape.


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