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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Write True Or False : When Iron and Sulphur Are Heated Together a Grey Mass is Formed Which is Attracted by a Magnet . - Chemistry

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प्रश्न

Write true or false :

When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .

पर्याय

  • True

  • False

MCQ
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उत्तर

False

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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 2.5

संबंधित प्रश्‍न

Complete and balance the following chemical equations

NaCI + `AgNO_3`  `→`


Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.

\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]


Write the missing reactants and products and balance the equations.

NaOH + ............... `→` NaCI + ...................


Give reason .

A person suffering from acidity is advised to take an antacid.


FILL IN THE BLANK

........... electrolytes dissociate completely in aqueous state and allow large amount of electricity to flow through it.


Fill in the blank.

Melting of ice is a _______ change.


Explain the following reaction with one suitable example of Decomposition reaction


Define a photochemical reaction.


Give an example of the following chemical change.

Two solids combine to form a liquid


Multiple choice:

Which of the following is not a characteristic of a chemical change?


Complete and balance the following reaction:

\[\ce{Pb(NO3)2 ->[\Delta]}\]


Name the following:

The type of change physical or chemical involved – ‘during respiration in human beings’.


State the following reaction represent oxidation or reduction.

\[\ce{Al->Al+++}\]


Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to sodium sulphite.


The chemical change is ______.


Chemists identify gypsum as a natural indicator.


Rusting of iron is  ______.


______ occurs in the absence of air and in the presence of micro-organisms such as yeast.


Write a note on the following:

Fermentation


Write the effects of chemical reactions.


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