Examples of polymers include the following except
starch
nylon
wool
perspex
glass
Correct answer is E
No explanation has been provided for this answer.
Which of the following will not affect the degree of hardness in a sample of temporarily hard water?
Addition of washing soda
Adding of soap
Treatment with carbon exchange resin
Filtration
Distillation
Correct answer is D
No explanation has been provided for this answer.
The component of air that removed when air is bubbled into alkaline pyrogallol solution is
carbon(lV) oxide
oxgyen
water vapour
nitrogen
helium
Correct answer is B
No explanation has been provided for this answer.
Which of the following substances is a peroxide?
Na2O2
CuO
Pb
Fe2O
AI2O
Correct answer is A
No explanation has been provided for this answer.
Which of the following indicates the correct increasing order of oxidizing power of the halogens?
F < CI < Br < l
l < Br < CI < F
I < CI < Br < F
Br < I < CI < F
CI < F < I < Br
Correct answer is B
No explanation has been provided for this answer.