Chemistry
Complete the table given below:
| Sl. No. | Column 1 | Column 2 | Column 3 |
|---|---|---|---|
| 1. | Heat on copper nitrate | Colour of acidic gas evolved | …………… |
| 2. | Heat on iodine crystals | Colours of vapours evolved | …………… |
| 3. | Heat on ammonium dichromate | Name of neutral gas evolved | …………… |
| 4. | Heat on copper carbonate | Test for gas evolved | …………… |
| 5. | Heat on zinc nitrate | Colour of residue | …………… |
| 6. | Addition of dil. H2SO4 to FeS | Odour of gas evolved | …………… |
| 7. | Addition of dil. H2SO4 to KHCO3 | Name of residue obtained | …………… |
| 8. | Addition of H2SO4 to zinc | Test for gas evolved | …………… |
| 9. | Heat on sodium chloride | Colour imparted to flame dring flame test. | |
| 10. | Flame test for calcium chloride | Acid used for flame test | …………… |
Practical Chemistry
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Answer
| Sl. No. | Column 1 | Column 2 | Column 3 |
|---|---|---|---|
| 1. | Heat on copper nitrate | Colour of acidic gas evolved | Reddish brown (Nitrogen dioxide) |
| 2. | Heat on iodine crystals | Colours of vapours evolved | Violet (Iodine vapours) |
| 3. | Heat on ammonium dichromate | Name of neutral gas evolved | Nitrogen gas |
| 4. | Heat on copper carbonate | Test for gas evolved | Colourless carbon dioxide gas is evolved which turns lime water milky and has no effect on KMnO4 |
| 5. | Heat on zinc nitrate | Colour of residue | Yellow when hot, White when cold (Zinc Oxide) |
| 6. | Addition of dil. H2SO4 to FeS | Odour of gas evolved | Rotten eggs smell (Hydrogen sulphide) |
| 7. | Addition of dil. H2SO4 to KHCO3 | Name of residue obtained | Residue of Potassium Sulphate |
| 8. | Addition of H2SO4 to zinc | Test for gas evolved | Burns with a pale blue flame producing pop sound. (Hydrogen Gas) |
| 9. | Heat on sodium chloride | Colour imparted to flame during flame test | Golden yellow (Na1+) |
| 10. | Flame test for calcium chloride | Acid used for flame test | Conc. HCl |
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Related Questions
Select the correct gas from A to F which matches with the description 1 to 5.
A: CO2
B: SO2
C: NH3
D: Water vapour
E: Cl2
F: H2S- Turns moist blue litmus red and then bleaches it.
- Turns moist red litmus paper blue.
- Turns lime water milky and blue litmus paper slightly pink.
- Turns cobalt chloride paper from blue to pink.
- Turns lead acetate paper from white to silvery black.
Select the correct salt from list II which on thermal decomposition exhibits the change in colour from list I - 1 to 5
List I List II 1. Light green to black A: Copper carbonate 2. White to yellow [heated state] B: Hydrated copper sulphate 3. Blue to black C: Copper nitrate 4. Orange to green D: Ammonium dichromate 5. Blue to white E: Zinc nitrate State which of the substances given below evolves oxygen gas on thermal decomposition.
- Zinc carbonate
- Washing Soda
- Lead nitrate
- Ammonium dichromate
- Trilead tetroxide
- Zinc nitrate
- Mercury [II] oxide
- Anhydrous copper sulphate
Select the correct answer from the words in bracket
- Hard and soft water can be distinguished using …………… [dil. acid / ordinary soap / detergent].
- Household detergents contain mainly …………… [carbonates/phosphates] and pollute water bodies.
- The type of water softened by addition of washing soda is …………… [permanent / temporary / both types].
- Unpolluted water has …………… [high/low] amount of dissolved oxygen.
- The sample of hard water which lathers with soap after boiling and filtration contains …………… [calcium chloride / calcium bicarbonate]