Question

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Answer 1

Answer:

1) An efflorescent decahydrate salt is washing soda

(Na2CO3 . 10H2O)

2) what is latin name of mercury

Hg is the modern chemical symbol for mercury. It comes from hydrargyrum, a Latinized form of the Greek word ὑδράργυρος (hydrargyros), which is a compound word meaning "water-silver" (from ὑδρ- hydr-, the root of ὕδωρ, "water," and ἄργυρος argyros "silver") – since it is liquid like water and shiny like silver.

3) name a liquid hygroscopic substance

A hygroscopic substance is one that readily attracts water from its surroundings, through either absorption or adsorption. Examples include honey, glycerin, ethanol, methanol, concentrated sulfuric acid, and concentrated sodium hydroxide (lye).

4) state valency of calcium in calcium nitride

valency of calcium in calcium nitride is 2

5) The gas which has no effect on acidified potassium dichromate or potassium permanganate solution is carbon dioxide.

Explanation:

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