Question

card is
Of red color
ii. A queen
A face card
ini.
3
13. 8 men and 12 boys can finish a piece of work in 10 days while 6 men and 8 boys can finish it 3
14 days. Find the time taken by I man alone and 1 boy alone to finish the work.​

Answer 1

Answer:

Acid, any substance that in water solution tastes sour, changes the colour of certain indicators (e.g., reddens blue litmus paper), reacts with some metals (e.g., iron) to liberate hydrogen, reacts with bases to form salts, and promotes certain chemical reactions (acid catalysis).

An acid is a molecule or ion capable of donating a proton (hydrogen ion H+) (a Brønsted–Lowry acid), or, alternatively, capable of forming a covalent bond with an electron pair (a Lewis acid). ... A lower pH means a higher acidity, and thus a higher concentration of positive hydrogen ions in the solution.