Question

help me please answer it fast please ​

Answer 1

Answer:

here is your answer

Explanation:

i -  corvert to red  , nochange , nochange , red , red , red , nochange , nochange

ii-  nochange , blue  , blue , nochange , nochange ,nochange, blue ,blue

iii- red  , yellow , yellow, red , red , red , yellow , yellow

iv - colorless , pink ,pink , colorless , colorless , colorless , pink , pink

Answer 2

1) when blue litmus paper is dipped in a solution and it remains blue it show that the solution is either basic or neutral in nature

2) when a red litmus paper is dipped in an acidic solution it does not have any effect on it

3) Lactic acid and hydrochloric acid will give a pale pink colour when tested with methyl orange indicator whereas sodium hydroxide and caustic soda will give a pale yellow colour

4) Phenolphthalein indicator turns pink in a basic solution. As the aqueous solution of K2CO3 produces KOH (strong base), therefore, the solution becomes alkaline in nature and changes the colour of phenolphthalein to pink