what is the indicator used?
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what is the valence of nitrogen?
Why are wires used to carry electricity ?
What test will you use to distinguish cotton from wool ?
Why does water boil above 100 o C in mines ?
The heat of the sun reaches us and the intervening air is not heated up Why ?
What is produced, when carbon is burnt ?
Explain the Hydrogen and its Compounds ?
What are the names of the three different rays emitted by radioactive substances ?
What is the min constitutes of haematite ore?
Acid value definition is number milligrams of koh required to nuetralise the acid present in one gram oil & fats but why not use naoh for nuetralisation?
Explain the following ? Matter, Element, Atom, Compound, Molecule, Mixture, Physical change, Chemical change
Does domestic/household used kerosene oil which is available in blue color (In India) can change its color over the due course of time say 8-10 years if keeping in plastic bottle? If so, in which color it will be turned to change, yellow or transparent or any other color. Please provide me the reply with strong technical approach. Since it has been asked during an interview. Please reply fast. I will be thankful to you if anyone can provide the supporting journals/write-ups/reference to favour of response.