Why is it dangerous to have a coal fire burning with doors and windows closed ?2 4731
Why does a diamond cut glass?2 4715
Why is the sea water saline ?9 13828
Why it is advised to boil water before drinking ?1 3650
Why is the percentage of oxygen today the same as it was thousands years ago, even though the whole world inhals it?1 3370
Why would we all suffocate, if all the green plants were killed ?1 2844
Why are substances like caustic soda and calcium chloride called hygroscopic substances ?2 4072
Why is sodium preserved in kerosene oil ?3 13423
Why is a newly made quit warmer than an old one ?1 2837
What causes smoke to curl up into the air ?1 3769
Why does a dog hang out his tongue, when it is hot ?2 3962
Why dies thermos flask keep a hot liquid hot and a cold liquid cold ?1 3151
Why does oil thrown on rough sea make it calmer ?1 2710
Why is heat more oppressive on a damp hot day ?1 2455
Why is dew formed more readily on clear nights than on cloudy ones ?1 3351
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?
What is fluidity of a liquid?
Give the principle of potentiometer titration.
Write the structural formula for edta.
Why is glass electrode called an ion selective electrode?
What is the composition of ferroin?
What is weak acid?
What happens when the excess of stannous chloride is not removed
Explain the term aliquot and diluent?
Why is sulphuric acid added during the preparation of standard fas solution?
How will you calculate how many moles of glucose present in 320 ml of 5.0 m of glucose solution?
Why is the indicator eriochrome black(ebt) shows wine red color at the beginning and blue color at the end?
What general group of organic compounds are not oxidesied in the cod test?
What is protein - according to chemistry?
What is mineral water?