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and are the c...

Question

_and are the chemicals stored in body of Bombardier Beetle that help in defence it from predators.

A

Hydrochloric acid and Nitric acid

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B

Hydroquinone and Hydrochloric acid

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C

Hydrogen peroxide and Sulphuric acid

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D

Hydroquinone and Hydrogen peroxide

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Solution

The correct option is D Hydroquinone and Hydrogen peroxide
Hydroquinone and Hydrogen peroxide are the chemicals stored in body of Bombardier Beetle that help in defence it from predators.Whenever the beetle feels threatened, these chemicals mix with some special enzymes and that heat up the liquids, which gives out bad smell from its body.

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Q. The African bombardier beetle stenaptinus insignis can emit a jet of defensive spray from the movable tip of its abdomen. The beetle's body has reservoirs of two different chemicals. When the beetle is disturbed, these chemicals are combined in a reaction chamber producing a compounds that is warmed from

20^{o}

100^{o}

C by the heat of reaction. The high pressure produced allows the compound to the sprayed out at speeds 19 ms

^{- 1}

scaring away predators of all kinds. Assume specific heat of two chemicals and the spray to be same as that of water

[4.19 \times 10^{3} J (k g K)^{- 1}]

and initial temperature of chemicals to be

20^{o}

C. How many times does the pressure increase?

The African bombardier beetle stenaptinus insignis can emit a jet of defensive spray from the movable tip of its abdomen. The beetle's body has reservoirs of two different chemicals. When the beetle is disturbed, these chemicals are combined in a reaction chamber producing a compounds that is warmed from

20^{o}

100^{o}

C by the heat of reaction. The high pressure produced allows the compound to the sprayed out at speeds 19 ms

^{- 1}

scaring away predators of all kinds. Assume specific heat of two chemicals and the spray to be same as that of water

[4.19 \times 10^{3} J / (k g K)^{- 1}]

and initial temperature of chemicals to be

20^{o}

C

Find the heat of reactions of two chemicals in J kg

^{- 1}

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