Which of the following will not affect the degree of hardness in a sample of temporarily hard water?
A. Addition of washing soda B. Adding of soap C. Treatment with carbon exchange resin D. Filtration E. Distillation Correct Answer: Option D – FiltrationThe component of air that removed when air is bubbled into alkaline pyrogallol solution is?
A. carbon(lV) oxide B. oxygen C. water vapour D. nitrogen E. helium Correct Answer: Option B – oxygenWhich of the following substances is a peroxide?
A. Na2O2 B. CuO C. PbO4 D. Fe2O E. AI2O3 Correct Answer: Option A – Na2O2
Which of the following indicates the correct increasing order of oxidizing power of the halogens?
A. F < CI < Br < l B. l < Br < CI < F C. I < CI < Br < F D. Br < I < CI < F E. CI < F < I < Br Correct Answer: Option B – l < Br < CI < FProducts
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