Question

Which of the following is alkaline in nature ?
(i) MgCO3
(ii) HCl
(iii) CuO
(iv) Ca(OH)2

Answer 1

Answer:

alkaline-earth metal, any of the six chemical elements that comprise Group 2 (IIa) of the periodic table. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They are harder and less reactive than the alkali metals of Group 1A.

The alkaline earth metals are shiny, silvery-white, and somewhat reactive metals at standard temperature and pressure. All the alkaline earth metals readily lose their two outermost electrons to form cations with a 2+ charge.

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Answer 2

Explanation:

Among the various options given in question statement the correct option is the first one.

Magnisium belongs to the category of alkaline metals. . However, this element is mainly found in the form of compounds in our nature. Reactive metals on reaction with steam(water) form corresponding oxide, which are alkaline in nature as they turn red litmus paper into blue coloured paper. Liberate on reaction with acid, such metals produce gas