The seasons are caused as the earth, tilted on its axis, travels in a loop around the sun each year
First question is D, condensation
Second is B, convection
The correct answer is -2 oxidation state.
Assume that the oxidation number of the sulfur atom in H2S S is x.Now, 2+x=0 ⇒ x=−2. As a result, the oxidation number of sulfur in H2S is -2. Various organosulfur compounds are produced by combining Hydrogen sulfide with sulfur. Sewer gas, swamp gas, stink damp, and sour damp all include Hydrogen sulphide, an invisible gas. It smells strongly of eggs, even in small amounts. It is extremely flammable and poisonous. While drilling for and producing crude oil and natural gas, gases like Hydrogen sulfide (H2S) are regularly found.
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Answer:
Option D (
)
Explanation:
Acids react with metal to form salt and hydrogen gas.
Metals which are more reactive than hydrogen evolve hydrogen gas on reaction with acid.
For example:
Magnesium reacts with hydrogen chloride to form magnesium chloride and hydrogen.
2HCl(aq) + Mg(s) → MgCl2(aq) + H2(g)
Al and Zn are more reactive than hydrogen, therefore, these metals evolve hydrogen gas on reaction with acid.
reacts with HCl to form NaCl and nitric oxide.
reacts with HCl to form potassium chloride, carbon dioxide and water.
As reaction of does not evolve any gas, therefore, the correct option is D.
