ICSE − Q & A

For sums regarding Gay-Lussacs law......if volume is given in dm^3 then do we leave final answer in dm^3 or write in litres coz 1 litre = 1 dm^3

+ 2 more questions by theodore  

What is the colour of neutral litmus solution??
asked by Theodore Coelho (theodore) 6 years ago
2

1. What do u observe when HCl is added to ZnS? ? Do v write answer directly as: A gas is evolved which smells like rotten eggs OR we write as When HCl is added to ZnS, a gas is evolved which smells like rotten eggs 2. Do we need to write percentage of each metal in an alloy...if asked or just names of metal is enough. 3. Two hydrocarbons X and Y containing carbon and hydrogen only have vapour density 13 and 39 respectively. Find the molecular formula of X and Y. (Plz send the working also...)
asked by Theodore Coelho (theodore) 6 years ago
3

What is the use of cotton wool in buring of ammonia in oxygen and what is the use of quartz in ostwalds process ?

hi, plzz answer,
  use for fuse metal and solder??
 both same use??

How will you convert sodium oxide and copper oxide to their respective chloride?
Give equations only.

+ 1 more questions by thejtthomas  

The ratio of the number of moles in 2 gram of hydrogen and 32 gram of oxygen is
asked by Tiara Elizabeth (thejtthomas) 6 years ago
2

Which gas turns feso4 soln brown?Is it NO or NO2?

just 9 chapters left.what about yours?

colour of FeCl3 solution?

Will any marks are deducted if we write the answer starting from because for reasoning Questions ??

Hi when will economics, commercial applications and evs specimen paper 2018 be uploaded? thanks

Guys since I use the Viraf dalal book, I have finally decided that I will tear out and make pape planes or burn all the foolish reviews and comments of teachers. I don't know about you all, its honestly a waste of paper