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Standard IX

Biology

Soil Testing and Its Significance

The harmful s...

Question

The harmful substance to the plants is _______.

Urea

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H N O_{3}

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C O_{2}

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N_{2}

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Solution

The correct option is B $H N O_{3}$
Urea $\to$ Fertilizers.
$C O_{2} \to$ Plants take in $C O_{2}$ .
$N_{2} \to$ No harm.
$H N O_{3} \to$ Acts as a fertilizers in very small concentration but can affect soil and growth of the plant.

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Similar questions

Q. Urea

(N H_{2} C O N H_{2})

is formed when

C O_{2}

reacts with

N H_{3}

C O_{2} + 2 N H_{3} ⟶ N H_{2} C O N H_{2} + H_{2} O

N H_{3}

and

C O_{2}

are obtained in the following steps:

I

N_{2} + 3 H_{2} 90 % - - \to 2 N H_{3}

I I

C a C O_{3} 50 % - - \to C a O + C O_{2}

Amount of

N_{2}

and

C a C O_{3}

required to produce

60

kg of urea are

X

kg and

Y

kg respectively. The value of

X + Y

(nearest integer value ) is :

Assertion (A): Jatropha plant Bio - fuel is less toxic as it does not emit harmful gases and also less expensive.
Reason (R): Indian Scientists made Neem Coated urea which released nitrogen gradualy and helps the plants to absorb maximum nitrogen.

Which of the following plants is considered harmful to other plants?

Q. The harmful substance present in deodorant is ________ compounds.

Q. ______ is the contamination of water by substances harmful to life.

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The harmful substance to the plants is _______.

The correct option is B HNO3Urea → Fertilizers.CO2→ Plants take in CO2.N2→ No harm.HNO3→ Acts as a fertilizers in very small concentration but can affect soil and growth of the plant.

The correct option is B $H N O_{3}$
Urea $\to$ Fertilizers.
$C O_{2} \to$ Plants take in $C O_{2}$ .
$N_{2} \to$ No harm.
$H N O_{3} \to$ Acts as a fertilizers in very small concentration but can affect soil and growth of the plant.