Please select a subject first
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Identify the substance underlined, in the following case
A solid formed by reaction of two gases, one of which is acidic and the other basic in nature
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State what would you observe when Washing Soda Crystals are exposed to the atmosphere
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From the list of the following salts choose the salt that most appropriately fits the
description is given in the following:
[AgCl, MgCl2, NaHSO4, PbCO3, ZnCO3, KNO3, Ca(NO3)2]
On heating, this salt gives a yellow residue when hot and white when cold
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From the list of the following salts choose the salt that most appropriately fits the
description is given in the following:
[AgCl, MgCl2, NaHSO4, PbCO3, ZnCO3, KNO3, Ca(NO3)2]
On heating this salt, a brown colored gas is evolved.
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State modern periodic law.
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Give one word or a phrase:
The property by which certain hydrated salts, when left exposed to atmosphere, lose their water of crystallization and crumble into powder.
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Write a balanced chemical equation for the following:
Action of dilute hydrochloric acid on magnesium sulphite.
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State one relevant observation for the following:
Anhydrous calcium chloride is exposed to air for some time.
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Give a reason for the following:
Alkali metals are good reducing agents.
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The salt prepared by the method of direct combination is _______.
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Write a balanced equation for the preparation of the following salts:
Copper sulphate from copper carbonate.
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Write a balanced equation for the preparation of the following salt:
Zinc carbonate from zinc sulphate.
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Name an alloy of lead and tin.
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Name the scientist who stated the modern periodic law.
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How many groups and periods does the modern periodic table have?
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What are horizontal rows and vertical columns in a periodic table known as?
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Correct the statement.
Copper and zinc are representative elements.
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Correct the statement.
Transition elements are placed at extreme right of the periodic table.
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Name two elements in Alkali metals.
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Name two elements in Alkaline earth metals.
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