Chemistry
A dry test tube containing lead nitrate is heated. Which of the following would be observed?
P. Brown fumes are given out.
Q. White coloured residue with yellow fumes are seen.
R. Yellow coloured residue is seen.
- Only P
- Only Q
- Only R and Q
- Both P and R
Related Questions
An amphoteric hydroxide having gelatinous white precipitate is ……………
- zinc hydroxide
- sodium hydroxide
- copper (II) hydroxide
- None of the above
The element with the least electronegativity is :
- Lithium
- Carbon
- Boron
- Fluorine
The energy required to remove an electron from a neutral isolated gaseous atom is called
- Ionisation Potential
- Electronegativity
- Electron Affinity
- Valency
Complete the following by choosing the correct answer from the bracket.
(a) The number of electrons present in valence shell of a halogen is …………… (5/7).
(b) The degree of ionisation of an acid in an aqueous solution is called its ……………(strength/concentration)
(c) Pure nitric acid decomposes to give yellow solution on exposure to heat due to the formation of …………… (nitrogen dioxide/nitrogen trioxide)
(d) Hydrocarbon having triple bond is called …………… (alkene/alkynes)
(e) The commonly used catalyst for the conversion of ethene to ethane is …………… (nickel/iron).