Which combination of the below is evidence of the molecular nature of matter?
I. Melting II. Boiling III. Refraction IV. Conduction A. II, III and IV only B. I, II and IV only C. I, III and IV only D. I, II and III only Correct Answer: Option B – I, II and IV only
The process whereby a liquid turns spontaneously into vapour is called?
A. regelation B. sublimation C. boiling D. evaporation Correct Answer: Option D – evaporation
The quantities of a good thermometer include?
I. reproducibility II. Sensibility III. High terminal capacity iv. High accuracy A. I, II and IV only B. I, III and IV only C. I, II and III only D. II, III and IV only Correct Answer: Option D – II, III and IV...
The process whereby the molecules of different substances move randomly is called?
A. capillarity B. surface tension C. osmosis D. diffusion Correct Answer: Option D – diffusion
A body of mass 36kg falls through a viscous liquid which offers a drag force of 260N on the body. The upthrust on the body at terminal velocity is? [g = 10ms−²]
A. 100N B. 620N C. 50N D. 310N Correct Answer: Option A – 100N Explanation For anybody falling through a viscous liquid, at its terminal velocity. the resultant force acting on its is zero. from the equation: Mg – v – u = 0. where v = viscous drag U...Products
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