Which one of the following gases burn with pop sound?
Hydrogen
Nitrogen dioxide
Sulphur dioxide
Oxygen
Which scientist discovered the radioactive element radium?
Albert Einstein
Benjamin Franklin
Isaac Newton
Marie Curie
The gas used in artificial ripening of green fruits is
ethane
hydrogen
acetylene
nitrogen
C.
acetylene
Acetylene is a gas used in artificial ripening of green fruits. It is a hydrocarbon having two triple bonded carbon atoms and two hydrogen atoms attached to each one of them. It is also used in the welding of metal combine with oxygen.
Brine' is
Common name of bleaching powder
aqueous solution of chlorine
saturated solution of NaCl
aqueous solution of Na2SO4
In laboratory, ethylene and acetylene can be distinguished by
Br2/H2O
KMnO4/OH/H2O
Tollens' reagent
Fehling solution