MCQ
The most common element used as fire extinguisher is:
- ✓$CO_2$
- BOxygen
- CPhosphorous
- DOxygen
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Manures
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Fertilisers
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$(i)$
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They are not soluble in water. So they are not easily absorbed by the roots of the plants.
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They are soluble in water and are absorbed by the plants easily.
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$(ii)$
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These are inorganic substances.
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These are organic substances.
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$(iii)$
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Excessive use does not harm the soil texture, they provide humus to the soil.
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Excessive use can change the chemical composition of the soil and also pollutes water.
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$(iv)$
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They restore the soil texture and help in water retention.
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They may damage the soil texture.
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$(v)$
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These are nutrient specific.
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These are not nutrient specific.
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| (a) Viviparous Animals | Oviparous Animals |
| $\quad~$Frog, dog, lizard | Cow, cat, hen |
| (b) Viviparous Animals | Oviparous Animals |
| $\quad~$Frog, dog, lizard | Dog, hen, cow |
| (c) Viviparous Animals | Oviparous Animals |
| $\quad~$Frog, dog, lizard | Frog, hen, lizard |
| (d) Viviparous Animals | Oviparous Animals |
| $\quad~$Frog, dog, lizard | Lizard, dog, cat |