An allene is a compound in which one carbon atom has double bonds with each of its two adjacent carbon centres. Allenes are classified as polyenes with cumulated dienes. The parent compound of allene is propadiene. Compounds with an allene-type structure but with more than three carbon atoms are called cumulenes. Allenes are much more reactive than most other alkenes. For example, their reactivity with gaseous chlorine is more like the reactivity of alkynes than that of alkenes.

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can two double bonds be next to each other?

A: yes

Phyllomedusine treefrogs are arboreal, meaning they spend a majority of their lives in trees; they are excellent jumpers. Red-eyed treefrogs are not poisonous and rely on camouflage to protect themselves. During the day, they remain motionless, cover their blue sides with their back legs, tuck their bright feet under their bellies, and shut their red eyes. Thus, they appear almost completely green, and well hidden among the foliage. The large red eyes serve as a defensive adaptation through deimatic behaviour. When a red-eyed treefrog detects an approaching predator, it abruptly opens its eyes and stares at the predator. The sudden appearance of the red eyes may startle the predator, giving the frog a chance to flee.

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is the red-eyed tree frog poisonous?

A: no

Although the seashore is most commonly associated with the word beach, beaches are also found by lakes and alongside large rivers.

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does a beach have to be by the ocean?

A: no

A ham hock (or hough) or pork knuckle is the joint between the tibia/fibula and the metatarsals of the foot of a pig, where the foot was attached to the hog's leg. It is the portion of the leg that is neither part of the ham proper nor the ankle or foot (trotter), but rather the extreme shank end of the leg bone.

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is ham hock the same as bacon hock?

A:
no