tests

Question 1

test for SO4^2-

Answer 1

IS H+/Ba^2+
BaSO4 (s) present

Question 2

OH test

Answer 2

AgNO3 = brown ppt

Question 3

test for NH4+

Answer 3

warm with NaOH
NH3 released
turns damp red litmus paper blue

Question 4

CO3^2- test

Answer 4

add dilute acid
see effervescence
= test in co2

Question 5

alcohol test

Answer 5

Na2CO3 - no fizz
then oxidise K2Cr2O7/H+

Question 6

carboxylic acid test

Answer 6

add Na2CO3 = fizz

Question 7

alkenes test

Answer 7

add Br2(aq) = orange turns colourless

Question 8

halogenoalkane test

Answer 8

heat NaOH(aq)
xs HNO3
AgNO3 (aq)
= ppt forms

Question 9

aldehyde test

Answer 9

tollens = red
silver mirror = formed

Question 10

carbonyl test

Answer 10

2,4-DNPH = yellow ppt

Question 11

COCH3 test

Answer 11

iodoform (iodine and sodium hydroxide)
= yellow ppt