Tin
Zinc
Copper
Lead
Aluminium
Correct answer is C
No explanation has been provided for this answer.
9.3 sec
14 sec
21 sec
28 sec
30.3 sec
Correct answer is C
The rate of diffusion of a gas is proportional to the square root of the density.
7/
7/4 x 6
But volume of chlorine is twice that of oxygen. The rate of escape of chlorine is
2/1 x 7/4 x 6/1 = 7 x 3; = 21 sec
The IUPAC names of the compounds CH3COOH and CH2=CH2 are respectively;
acetic acid and ethene
methanoic acid and ethene
methanoic acid and ethylene
ethanol and ethene
acetic acid and ethylene
Correct answer is A
The IUPAC id for \(CH_{3}COOH\) is Acetic acid, while for \(C_{2}H_{4}\) is ethene.
The reaction between an organic acid and an alcohol in the presence of an acid catalyst is known as;
saponification
dehydration
esterification
hydrolysis
hydration
Correct answer is C
Esterification, a reaction in which a carboxylic acid and an alcohol, heated in the presence of a mineral acid catalyst, form an ester and water:
the litmus turns blue but no gas is evolved
the litmus turns blue and oxygen is evolved
the litmus turns blue and hydrogen is evolved
the litmus turns red and oxygen is evolved
the litmus turns red and then becomes colourless
Correct answer is D
Cu\(^+\) is discharged preferentially at the cathode
OH\(^-\) is discharged preferentially at the anode
The presence of SO\(_4\)\(^2-\) and H\(^+\) makes the medium acidic
Which makes the litmus turns red and oxygen is evolved