ICSE − Q & A

For hydration of ethene can I write this equation?? 
C²H⁴+H²O------> C²H5OH
In the presence of h2so4 at 170°c

Whats the Color of a strontium flame and how cqn we differentiate it with the flame of calcium

Does someone has difficult and tricky numerical of mole. plz do send!🙏🙏thnx in advance 😊😇😇

TIP FOR ALL-----
U CAN USE 6*10^23 AS AVOGADRO NUMBER INSTEAD OF THE COMPLICATED ONE
PS----if u already know this i only wrote this as i saw many people use 6.023*10^23

Why is alumina added to cryolite in the electrolytic reduction of
aluminium?

Any economics student in the house?

Name the hydrocarbon which :
1.is a tetrahedral molecule
2.is a planar molecule
3.is a linear molecule
4.forms a red ppt with ammonical copper chloride
5.known as paraffin
6.known as oleum
7.which will give acetylene when treated with water

roasting is carried out on sulphide ores and not carbonate ores. Why?

do we have diagram drawing for electrolysis?? :O
specimen paper q

magnesium is burnt in nitrogen. 
what do we have to add in this statement?

which solutions have ions as well as molecules- PbBr2, NaCl, CuCl2, NaHCO3