What volume of hydrogen would be left over when 300cm³ of oxygen and 1000cm³ of hydrogen are exploded in a sealed tube?
2H2(g) + O2(g) → 2H2O(g) A. 200cm ³ B. 400cm ³ C. 600cm ³ D. 700cm ³ Correct Answer: Option B – 400cm ³
Which of the below can correctly be listed as evidences for the particulate nature of matter?
l . Evaporation. ll. Sublimation. lll. Diffusion. IV. Brownian motion. A. I and lll only B. ll and lV only C. l, ll and lll only D. l, ll, lll and lV Correct Answer: Option D – l, ll, lll and...
An increase in the pressure exerted on gas at a constant temperature results in?
A. a decrease in the number of effective collisions B. a decrease in volume C. an increase in the average intermolecular distance D. an increase in volume Correct Answer: Option B – a decrease in volume
Which of the following methods can be used to obtain pure water from a mixture of sand, water and methanoic acid?
A. netralization with NaOH, followed by filtration B. neutralization with NaOH, followed by distillation C. fractional distillation D. filtration followed by distillation Correct Answer: Option D = filtration followed by...Products
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