Quiz1:chapter2 chemical analysis

<a href="https://gogoacademy.net/science-for-primary-4th-final-revision-for-primary-4/">chemical</a> analysis is useful in etraction iron from its ores because it ….

Analysis of inorganic compounds included detection of ……

To identify <a href="https://gogoacademy.net/science-for-primary-4th-final-revision-for-primary-4/">chemical</a> formula of a compound we should identify ……

To identify a substance by measuring its molar <a href="https://gogoacademy.net/science-prep-1-final-revision/">mass</a> or melting point  it should be …

    The most stable acid is ….

7)The most stable acid is ….

Dil. HCl  can detect all the following except ….

Anion (A) from dil. HCl groups ……

Acid form which  nitrate ion is derived from is ….

Dil. HCl is used to detect CO3^2-  because …

If A=K2CO3 , B=CaCO3 and C=(NH4)2CO3

Ca(HCO3)2  and Al(HCO3)3 are two salts :

Which of the following pairs of ions forms ppt. when mixed with a dilute aqueous medium ?

All carbonate of  Na+ ,Mg2+, Ca2+ are soluble in ….

All bicarbonate of  Na+ ,Mg2+, Ca2+ are soluble in ….

which of the following may give a white ppt. 

By adding dil. HCl to salts of unstable acids it can replace them in the form of …..

All of thes unstable acids replaced by dil. HCl  then decoplosed except …

By adding dil. HCl to ……… salt it gives a bad smell gas

By adding dil. HCl to ……… salt it gives gas turbid lime water

By adding dil. HCl to ……… salt it gives  an irritating smell gas

By adding dil. HCl to a solid ……… salt  it gives  colorless gas turns into reddish brown gas at the mouth of the tube

By adding MgSO4 to ……… salts solutions it gives  white ppt on cold

By adding MgSO4 to ……… salts solutions it gives  white ppt after heating

By adding AgNO3 to ……… salt solutions it gives  black ppt directly

By adding AgNO3 to ……… salt solutions it gives  balck ppt after heating

By adding I2 solution to ……… salt solutions it removes the brown color of I2

By adding acidified KmnO4 solution to ……… salt solutions it removes the brown color of I2

By adding AgNO3 to ……… salt solutions it gives  white ppt. that turns into balck ppt after heating

By adding dil. HCl  to ……… solid salt  it gives  irritating smell gas and a yellow ppt of an element

By adding dil. HCl  to ……… solid salt  it gives  irritating smell gas ,and changes a pape wet with acidified potsium dicromate from orange to green yellow ppt of an element