What is iron ore consists of?
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Why is it more efficient for a labourer to raise bricks up to a brick layer by the use of a rope and pully than by carrying them up a ladder ?
Explain the Mixture?
What is the acidity of a base
What is the composition of air ?
Why does milk turn sour ?
Why can?t snowballs be made in very cold weather ?
What is Catalysis ?
Why are the titration involving edta carried out slowly towards the end point?
What is meant by transmittance?
Why is the bottom of a kettle blackened and top polished?
What is Distillation ?
What is the prime constituents of cement?