Which of the following will Increase the rate of reaction of Chips of a metal M as shown in the equation below?
M(s)+2HC1(aq) → MCI2 (aq) + H2(g) A. Adding some distilled water B. Decreasing the temperature C. Diluting the hydrochloric acid D. Grinding the metal into powder E. Increasing the pressure Correct Answer: Option D – Grinding the metal into...
What is the colour of phenolphthalein indicator in a basic medium?
A. Blue B. Colourless C. Orange D. Pink E. Yellow Correct Answer: Option D – Pink
Brain tumors can be located by using an isotope of?
A. carbon – 14 B. iodine 131 C. technetium 99 D. uranium235 E. uranium 238 Correct Answer: Option C – technetium 99
During the extraction of iron in the blast furnace; slag is produced using?
A. carbon B. crylite C. limestone D. oxygen E. sulphur Correct Answer: Option C – limestone
Which of the following gases is absorbed from the air during photosynthesis?
A. Carbon (II) oxide B. Carbon (IV) oxide C. Nitrogen D. Noble gases E. Oxygen Correct Answer: Option B – Carbon (IV) oxideProducts
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