activation energy of the reaction
rate of the reaction
rate of the reverse reaction
heat of reaction
Correct answer is D
No explanation has been provided for this answer.
Which of the following reagents could be used to distinguish between propan-1-ol and propan-2-ol
H+ / K2Cr2O7
I\(_2\) / OH-
CH\(_3\)COOH
NaCl
Correct answer is A
when a primary alcohol like ethanol is warmed with excess of an oxidizing reagent, such as acidified Potassium permanganate( KMnO₄) or acidified Potassium dichromate(VI) ( K2Cr2O7 ), it is oxidized first to ethanal then to ethanoic acid, WHILE
Secondary alcohols like butan-2-ol will be oxidized to alkanones
propan-1-ol - primary alcohol,
propan-2-ol- secondary alcohol
- The Lucas test in alcohols is a test to differentiate between primary, secondary, and tertiary alcohols. It is based on the difference in reactivity of the three classes of alcohols with hydrogen halides
When excess chlorine is mixed with ethane at room temperature, the product formed is?
1,2-dichloroethane
1,2-dichloroethene
1,1-dichloroethane
1,1-dichloroethene
Correct answer is A
- The chemical compound 1,2-dichloroethane, commonly known as ethylene dichloride (EDC), is a chlorinated hydrocarbon
C\(_3\)H\(_8\)O
C\(_6\)H\(_12\)O
C\(_6\)H\(_12\)O\(_2\)
C\(_12\)H\(_12\)O\(_11\)
Correct answer is B
C = 72 / 12 H = 12 / 1 O = 16 / 16
C = 6 H = 12 O = 1
: EMPIRICAL FORMULA
C\(_6\)H\(_12\)O
What is the name of the gas liberated when diluted hydrochloric acid is added to iron(ii)sulphide?
turns lime water milky
decolorizes bromine water
gives a pop sound
turns lead(ii)ethanoate paper black
Correct answer is D
- Iron sulfide reacts with hydrochloric acid, releasing hydrogen sulfide: FeS + 2HCl → FeCl\(_2\) + H\(_2\)S.
- Hydrogen sulfide reacts with lead acetate to form lead sulfide and thus produces a coloration on the paper which will vary from yellow to black, depending upon the amount of hydrogen sulfide present.