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Standard XII

Chemistry

Reactivity with Halogens and Hydrogen (Group 2)

When boron ox...

Question

When boron oxide is reduced with carbon in an electric furnace, a disproportionation reaction takes place.

$2 B_{2} O_{3} + 7 C ⟶ A + B$

It is found that Compound $A$ is harder than diamond.
Which of the following statements is incorrect about compound $A$ ?

It is used in making bullet proof jacket.

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It reacts with haemoglobin.

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It can be used as abrasive.

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It is used as shield of radioactive..

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Solution

The correct option is B It reacts with haemoglobin.
We know that boron carbides are used in making bulletproofs and it can be used as abrasive.

$2 B_{2} O_{3} + 7 C ⟶ B_{4} C + 6 C O$
$↓$ $↓$
$(A)$ $(B)$

It is used as control rods in nuclear fission.

$C O$ reacts with haemoglobin to form a complex product which reduces oxygen in the blood.

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When boron oxide is reduced with carbon in an electric furnace, a disproportionation reaction takes place. 2B2O3+7C⟶A+BIt is found that Compound A is harder than diamond.Which of the following statements is incorrect about compound A?

When boron oxide is reduced with carbon in an electric furnace, a disproportionation reaction takes place.

$2 B_{2} O_{3} + 7 C ⟶ A + B$

It is found that Compound $A$ is harder than diamond.
Which of the following statements is incorrect about compound $A$ ?