Fill in the blanks by choosing an appropriate option.
`ul(" W ")` is a very reactive metal, reacts vigorously with oxygen and water therefore, stored in `ul(" (1) ")`.
`ul(" X ")` is a non-metal, soft and dull and forms `ul(" (2) ")` oxides with oxygen.
`ul(" Y ")` is very reactive `ul(" (3) ")`, catches fire if exposed to air therefore, stored in water.
`ul(" Z ")` does not react with dilute hydrochloric acid even on heating but it reacts with sulphuric acid. When it is exposed to moist air for long, it acquires a dull `ul(" (4) ")` coating.
Fill in the blanks by choosing an appropriate option.
`ul(" W ")` is a very reactive metal, reacts vigorously with oxygen and water therefore, stored in `ul(" (1) ")`.
`ul(" X ")` is a non-metal, soft and dull and forms `ul(" (2) ")` oxides with oxygen.
`ul(" Y ")` is very reactive `ul(" (3) ")`, catches fire if exposed to air therefore, stored in water.
`ul(" Z ")` does not react with dilute hydrochloric acid even on heating but it reacts with sulphuric acid. When it is exposed to moist air for long, it acquires a dull `ul(" (4) ")` coating.
`ul(" W ")` is a very reactive metal, reacts vigorously with oxygen and water therefore, stored in `ul(" (1) ")`.
`ul(" X ")` is a non-metal, soft and dull and forms `ul(" (2) ")` oxides with oxygen.
`ul(" Y ")` is very reactive `ul(" (3) ")`, catches fire if exposed to air therefore, stored in water.
`ul(" Z ")` does not react with dilute hydrochloric acid even on heating but it reacts with sulphuric acid. When it is exposed to moist air for long, it acquires a dull `ul(" (4) ")` coating.
A
W-Na, 1-Water, X-S, 2-Basic, Y-P, 3-Metal, Z-Cu, 4-Reddish brown
B
W-Mg, 1-Kerosene, X-P, 2-Acidic, Y-Si, 3-Metal, Z-Ag, 4-Reddish brown
C
W-Na, 1-Kerosene, X-S, 2-Acidic, Y-P, 3-Non-metal, Z-Cu, 4-Green
D
W-Al, 1-Water, X-Zn, 2-Amphoteric, Y-P, 3-Non-metal, Z-Cu, 4-Green
Text Solution
AI Generated Solution
The correct Answer is:
To fill in the blanks for the given question, we can analyze each part of the statement step by step.
### Step 1: Identify W
- **Statement**: `ul(" W ")` is a very reactive metal, reacts vigorously with oxygen and water therefore, stored in `ul(" (1) ")`.
- **Analysis**: The metal that is very reactive and reacts vigorously with oxygen and water is sodium (Na). Sodium is an alkali metal known for its high reactivity.
- **Conclusion**: W = Sodium
- **Storage**: Sodium is stored in kerosene to prevent it from reacting with moisture and oxygen in the air.
**Fill in the blank (1)**: Kerosene
### Step 2: Identify X
- **Statement**: `ul(" X ")` is a non-metal, soft and dull and forms `ul(" (2) ")` oxides with oxygen.
- **Analysis**: The non-metal that is soft and dull and forms acidic oxides is sulfur (S). Sulfur is known for forming sulfur dioxide (SO2) when it reacts with oxygen.
- **Conclusion**: X = Sulfur
- **Type of oxides**: Sulfur forms acidic oxides.
**Fill in the blank (2)**: Acidic
### Step 3: Identify Y
- **Statement**: `ul(" Y ")` is very reactive `ul(" (3) ")`, catches fire if exposed to air therefore, stored in water.
- **Analysis**: The non-metal that is very reactive and catches fire when exposed to air is phosphorus (P). Phosphorus is known to ignite spontaneously in air.
- **Conclusion**: Y = Phosphorus
- **Type of reactivity**: Phosphorus is very reactive.
**Fill in the blank (3)**: Non-metal
### Step 4: Identify Z
- **Statement**: `ul(" Z ")` does not react with dilute hydrochloric acid even on heating but it reacts with sulphuric acid. When it is exposed to moist air for long, it acquires a dull `ul(" (4) ")` coating.
- **Analysis**: The metal that does not react with dilute hydrochloric acid but reacts with sulfuric acid is copper (Cu). When copper is exposed to moist air, it forms a greenish coating of copper carbonate or copper oxide.
- **Conclusion**: Z = Copper
- **Coating**: The dull coating formed is green.
**Fill in the blank (4)**: Green
### Final Answers:
1. Kerosene
2. Acidic
3. Non-metal
4. Green
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