QQuestion
The nitrate which on thermal decomposition leaves behind a residue which is yellow when hot and white when cold: [1]
- Lead nitrate
- Ammonium nitrate
- Copper nitrate
- Zinc nitrate
✓Answer
d. Zinc nitrate
Explanation:
On heating, zinc nitrate decomposes to form zinc oxide, nitrogen dioxide, and oxygen.
2\mathrm{Zn(NO_3)_2} \xrightarrow{\Delta} 2\mathrm{ZnO} + 4\mathrm{NO_2} + \mathrm{O_2}The solid residue is zinc oxide (ZnO), which is yellow when hot and white when cold.
Related Questions
More ICSE Easy level questions
The salt formed when concentrated sulphuric acid reacts with KNO3 above 200°C: [1]K2SO4K2SO3KHSO4KHSO3
The metallic hydroxide which forms a deep inky blue solution with excess ammonium hydroxide solution is: [1]Fe(OH)2Cu(OH)2Ca(OH)2Fe(OH)3
In the laboratory preparation, HCl gas is dried by passing through: [1]Dilute nitric acidConcentrated sulphuric acidDilute sulphuric acidAcidified water
The acid which does not form acid salt by a basic radical: [1]H2CO3H3PO4H2SO4CH3COOH
An example of a cyclic organic compound is: [1]PropenePenteneButeneBenzene
The property exhibited by concentrated sulphuric acid when it is used to prepare hydrogen chloride gas from potassium chloride: [1]Dehydrating propertyDrying propertyOxidizing propertyNon-volatile acid property
The hydrocarbon formed when sodium propanoate and soda lime are heated together: [1]MethaneEthaneEthenePropane
The indicator which changes to pink colour in an alkaline solution is: [1]Blue LitmusMethyl OrangeRed LitmusPhenolphthalein
The general formula of hydrocarbons with single covalent bonds is: [1]CnH2n+2CnH2nCnH2n−2CnH2n−6
Which of the following reactions takes place at the anode during the electroplating of an article with silver? [1]Ag − 1e− ⟶ Ag1+Ag + 1e− ⟶ Ag1−Ag − 1e− ⟶ AgNone of the above
An element with the largest atomic radius among the following is: [1] Carbon Nitrogen Lithium Beryllium
The vapour density of CH₃OH is ............... (At. Wt. C=12, H=1, O=16) [1] 32 18 16 34