acid and alkali

Question 1

neutralisation

Answer 1

hydrogen + hydroxide = water

Question 2

physical properties of acid

Answer 2

sour, turns blue litmus red, pH<7
produce H+ ions

Question 3

chemical properties of acid

Answer 3

acid+metal -> salt+hydrogen
acid+carbonate -> salt+carbon dioxide+water
acid+base -> salt+water

Question 4

physical properties of base

Answer 4

bitter, turns red litmus blue, pH>7
produce OH- ions

Question 5

oxides

Answer 5

amphoteric oxide
basic oxide
acidic oxide
neutral oxide

Question 6

acidic oxide

Answer 6

non-metals (grp VI to VII), can dissolve in water, react with bases to form salt and water

Question 7

basic oxide

Answer 7

metal (grpI, II), dissolve in water to give alkali, react with acid to form salt and water

Question 8

amphoteric oxide

Answer 8

some metals ( near the staircase), display both acidic and basic properties, react with both acid and bases eg. aluminum, zinc, lead

Question 9

neutral oxide

Answer 9

some non-metals, display neither acidic or basic properties eg. water

Question 10

how to neutralise acidic soil

Answer 10

add quicklime to neutralise excess H+ ions