Why is it dangerous to have a coal fire burning with doors and windows closed ?2 4647
Why does a diamond cut glass?2 4650
Why is the sea water saline ?9 13628
Why it is advised to boil water before drinking ?1 3595
Why is the percentage of oxygen today the same as it was thousands years ago, even though the whole world inhals it?1 3324
Why would we all suffocate, if all the green plants were killed ?1 2799
Why are substances like caustic soda and calcium chloride called hygroscopic substances ?2 3973
Why is sodium preserved in kerosene oil ?3 13307
Why is a newly made quit warmer than an old one ?1 2779
What causes smoke to curl up into the air ?1 3696
Why does a dog hang out his tongue, when it is hot ?2 3906
Why dies thermos flask keep a hot liquid hot and a cold liquid cold ?1 3098
Why does oil thrown on rough sea make it calmer ?1 2625
Why is heat more oppressive on a damp hot day ?1 2407
Why is dew formed more readily on clear nights than on cloudy ones ?1 3311
Why do you require laboratory temperature for viscosity determination?
Why ph scale range is 14? Why it is not less or not greater than 14? Solution of hcl or hydrogen containing liquid has a ph. But if the solution is kmno4 here nothydrogen power does it ph?
What are the advantages of conductometric titration over visual or potentiometric titration?
How many millilitre is equal to 1 litre and how many microliter is equal to litre?
describe the lewis dot structure of Mg2+?
Differentiate between modern periodic table and mendeleevs table?
How is temporary hardness be removed?
Why is disodium salt of edta preferred to edta?
What is the white precipitate produced at the end of point?
What is the difference between volumetric solutions and test solutions
What is fluidity of a liquid?
What is equivalent conductivity?
What are the electrodes used in the measurement of ph for the determination of pka?
What is wave number?
State lambert’s law.