Please select a subject first
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From the following list of substances, choose one substance in each case which matches the description given below:
Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate.
A nitrate which gives off oxygen and nitrogen dioxide when heated.
Concept: undefined >> undefined
Fill in the blank:
Aqua regia is a mixture of 3 parts ------------ and one part ------------.
Concept: undefined >> undefined
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Fill in the blank:
The catalytic oxidation of ammonia to nitric oxide is ------------. (exothermic / endothermic)
process.
Concept: undefined >> undefined
Give reasons for the following:
Sulphuric acid forms two types of salts with NaOH.
Concept: undefined >> undefined
Fill in the blank :
Magnesium gives ------------(O2, H2, NO) with very dilute nitric acid.
Concept: undefined >> undefined
Fill in the blank:
------------ (iron / copper) become passive in concentrated nitric acid
Concept: undefined >> undefined
Give reason for the following:
Red brown vapours are produced when concentrated sulphuric acid is added to hydrogen bromide.
Concept: undefined >> undefined
Give reasons for the following:
A piece of wood becomes black when concentrated sulphuric acid is poured on it.
Concept: undefined >> undefined
Give reasons for the following:
Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.
Concept: undefined >> undefined
Copy and complete the following table:
| Column 1 | Column 2 | Column 3 |
| Substance reacted with acid | Dilute or concentrated acid | Gas |
| Hydrogen | ||
| Carbon dioxide | ||
| Only chlorine |
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Why are alkali metals kept in kerosene oil?
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Write a balanced chemical equation for each of the following reactions :
Action of dilute sulphuric acid on sodium hydroxide.
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Write a balanced chemical equation for each of the following reactions :
Action of dilute sulphuric acid on zinc sulphide.
Concept: undefined >> undefined
Write a balanced chemical equation for each of the following reactions :
Ammonium hydroxide is added to ferrous sulphate solution.
Concept: undefined >> undefined
State one observation for the following:
Concentrated nitric acid is reacted with sulphur.
Concept: undefined >> undefined
State one observation for each of the following :
Lead nitric is heated strongly in a test tube.
Concept: undefined >> undefined
The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
Which solution will have no effect on litmus solution?
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The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
Which solution will liberate CO2 when reacted with sodium carbonate?
Concept: undefined >> undefined
Name the particles present in :
Strong electrolyte
Concept: undefined >> undefined
Distinguish between the following pairs of compounds using the reagent given in the bracket.
Mangenese dioxide and copper (II) oxide. (using concentrated HCl)
Concept: undefined >> undefined
