Why is it dangerous to have a coal fire burning with doors and windows closed ?2 5481
Why does a diamond cut glass?2 5439
Why is the sea water saline ?9 15654
Why it is advised to boil water before drinking ?1 4284
Why is the percentage of oxygen today the same as it was thousands years ago, even though the whole world inhals it?1 3935
Why would we all suffocate, if all the green plants were killed ?1 3357
Why are substances like caustic soda and calcium chloride called hygroscopic substances ?2 4753
Why is sodium preserved in kerosene oil ?3 14599
Why is a newly made quit warmer than an old one ?1 3359
What causes smoke to curl up into the air ?1 4361
Why does a dog hang out his tongue, when it is hot ?2 4628
Why dies thermos flask keep a hot liquid hot and a cold liquid cold ?1 3637
Why does oil thrown on rough sea make it calmer ?1 3278
Why is heat more oppressive on a damp hot day ?1 2992
Why is dew formed more readily on clear nights than on cloudy ones ?1 3906
can we Consider the Purity threshold and Purity angle in place of peak purity for the specificity test for method verification
Do all explosions produce carbon dioxide or carbon monoxide?
Why are the titration involving edta carried out slowly towards the end point?
Define what is oxidation and reduction reaction?
How many millilitre is equal to 1 litre and how many microliter is equal to litre?
What are the advantages of potentiometric titration?
which gas is used in preaparation of bit salt
What is the formula you will use to calculate how many millilitres of 5.5 m naoh are required to prepare 400 ml of 1.5m naoh?
How is hardness of water caused?
What is titration?
Which is the best conductor of electricity?
Why ph scale range is 14?
What is meant by ph of a solution?
How BIS Decedied the LSF value 0.66-1.02 with calculation.
explain sour gas?