When moist starch iodide paper is introduced into chlorine gas.

Subject

Chemistry

Class

ICSE Class 10

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 Multiple Choice QuestionsShort Answer Type

41.

Name the following:
A compound added to lower the fusion temperature of electrolytic bath in the extraction of aluminium.

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42.

Name the following:

The ore of zinc-containing its sulphide.

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43.

Write a balanced equation for the following:

The action of dilute hydrochloric acid on sodium sulphide.

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44.

State your observation in each of the following cases:

When dilute hydrochloric acid is added to sodium carbonate crystal

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45.

When moist starch iodide paper is introduced into chlorine gas.


Moist starch iodide paper turns blue black.

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46.

Write balanced equation for the following:

The action of warm water on magnesium nitride.

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47.

State your observation in the following case:

When calcium hydroxide is heated with ammonium chloride crystal.

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48.

Name the other ion formed when ammonia dissolves in water.

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49.

Give one test that can be used to detect the presence of the ion produced

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50.

Write balanced equation for the following:

Action of heat on a mixture  of copper and concentrated nitric acid.

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