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⁞ Chemistry

General Science ➤ Chemistry ➤ 2
Question 6
Q6.  What does a catalyst do in a reaction?
 

Answer :  Speeds up chemical reaction


A catalyst is an agent or compound that increases the rate of a reaction without itself being consumed. Enzymes are naturally occurring catalysts responsible for many essential biochemical reactions. Most solid catalysts are metals or the oxides, sulfides, and halides of metallic elements and of the semi-metallic elements boron, aluminum, and silicon.
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Question 7
Q7.  What is Zeolite?
 

Answer :  Hydrated Aluminosilicate


Zeolites are hydrated aluminosilicate minerals made from interlinked tetrahedra of alumina (AlO4) and silica (SiO4). In simpler words, they’re solids with a relatively open, three-dimensional crystal structure built from the elements aluminium, oxygen, and silicon, with alkali or alkaline-Earth metals (such as sodium, potassium, and magnesium) plus water molecules trapped in the gaps between them.
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Question 8
Q8.  What do you understand by the term Espuma?
 

Answer :  Foam


Espuma is a Spanish term for froth or foam, and one that is created specifically with the use of a siphon bottle. Espuma is created mainly with liquid that has air incorporated in it to create froth. This is a specific term, since culinary foams may be attained through other means.
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Question 9
Q9.  Brine refers to:
 

Answer :  Salt water


Brine is a solution of salt in water.
In different contexts, brine may refer to salt solutions ranging from about 3.5% up to about 26%. Other levels of concentration are called in different names.
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Question 10
Q10.  What is the more common name for solid carbon dioxide?
 

Answer :  Dry Ice


Dry ice is just cooled condensed and solid form of carbon dioxide.

  • It turns directly into carbon dioxide gas rather than a liquid.
  • It is used primarily as a cooling agent.

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