Exercises
Jharkhand Board Science Solutions for Exercises
Simple step-by-step solutions to Exercises questions of Combustion and Flame from SCIENCE : CLASS VIII. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from Exercises with Hints & Solutions
Burning of wood and coal causes _____ of air. (purification/ pollution)
A liquid fuel used in home is _____. (glycerine / kerosene)
Fuel must be heated to its _____ before it starts burning.
Fire produced by oil cannot be controlled by _____. (sand/water)
Which zone of a flame does a goldsmith use for melting gold and silver and why?
In an experiment 4.5 kg of a fuel was completely burnt. The heat produced was measured to be 180,000 kJ. Calculate the calorific value of the fuel.
Can the process of rusting be called combustion? Discuss.
Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?
