A student took some lead nitrate compound in a boiling tube and heated it strongly. The gas/gases evolved on heating this compound is/are :(1) NO₂(2) NO₂ + CO₂(3) NO₂ + O₂(4) N₂ + O₂

Academic Chemistry NCERT Class 9

Correct Answer: (3) NO2 + O2

Explanation: On heating lead nitrate, it decomposes into simpler substances, they impart different colour to the solution.

$2Pb(NO_3)_2 → 2PbO + 4NO_2 + O_2$

colourless yellow ppt brown fumes

Tutorialspoint

Updated on: 10-Oct-2022

24 Views

A student while heating solid lead nitrate taken in a test-tube would observe :(1) white residue of PbO2(2) green residue of NO2(3) yellow residue of PbO(4)brown residue of NO
When a student heated a colourless solid compound, then brown fumes of a gas are evolved. The colourless solid is most likely to be :(1) ferrous sulphate (2) lead carbonate(3) lead nitrate (4) lead sulphate
Balance the following reactions:a. Na + HCl → NaCl + H2b. KClO3 → KCl + O2c. Al + Fe2O3 → Al2O3 + Fed. Na2SO4 + BaCl2 → NaCl + BaSO4e. Pb(NO3)2 → PbO +NO2 + O2
The colour of residue left behind on heating lead nitrate when it is still hot is:(1) green (2) yellow(3) black (4) reddish brown
On heating blue coloured powder of copper (II) nitrate in a boiling tube, black copper oxide, O2 and a brown gas X is formed.(a) Identify the type of reaction and gas X.(b) Write the balanced chemical equation of the reaction.(c) Write the pH range of the aqueous solution of the gas X.
Give the characteristic tests for the following gases(a) CO2(b) SO2(c) O2(d) H2
A student heats calculated amounts of iron filings and sulphur powder together in a boiling tube. He will obtain :(1) a homogeneous mixture of Fe and S(2) a heterogeneous compound of Fe and S(3) a homogeneous compound of FeS(4) a heterogeneous mixture of FeS, Fe and S
What is the molecular mass of-1. H2, 2. O2, 3. Cl2, 4. CO2, 5. CH2, 6. C2H6, 7. C2H4, 8. NH3, 9. CH3OH.
Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over the burning sulphur.What will be the action of this gas on:Dry litmus paper?Moist litmus paper?Write a balanced chemical equation for the reaction taking place.
Balance the following equations:1. Mg + H2SO4 --------> MgSO4 + H22. CaCO3 + HCl --------> CaCl2 + H2O + CO23. Ag + HNO3 --------> AgNO3 + H2O + NO2
When zinc metal is heated with caustic soda solution, the gas evolved is:(1)hydrogen(2)carbon dioxide(3) oxygen(4)hydrogen choride
What happens when ferrous sulphate crystals are heated?(a) A gas having the smell of burning sulphur is evolved(b) No gas is evolved(c) Brown coloured gas is evolved(d) Colourless and odourless gas is evolved.
A neutral organic compound is warmed with some ethanoic acid and a little of conc. H2SO4. Vapours having sweet smell (fruity smell) are evolved. What type of functional group is present in this organic compound?
An organic compound A on heating with concentrated H2SO4 forms a compound B which on addition of one mole of hydrogen in presence of Ni forms a compound C. One mole of compound C on combustion forms two moles of CO2 and 3 moles of H2O. Identify the compounds A, B and C and write the chemical equations of the reactions involved.

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements