Chemistry Questions

Q:

Which among the following minerals is also known as Horn Silver?

A) Silver Chroride B) Zinc Phosphate
C) Silver Iodide D) Silver Sulphide
 
Answer & Explanation Answer: A) Silver Chroride

Explanation:

Silver chloride is a chemical compound with the chemical formula AgCl is also called as Horn Silver. It is also called as cerargyrite. It is a gray, very heavy halide mineral and an ore of silver.

Which_among_the_following_minerals_is_also_known_as_Horn_Silver1560942904.jpg image

 

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Q:

What are the Monomers that make up Proteins?

A) Amino acids B) Nucleotides
C) Disaccharides D) Chaperones
 
Answer & Explanation Answer: A) Amino acids

Explanation:

Proteins are long chains of Amino acids. That is in brief, Amino acids are the monomers of Proteins. Amino acids are compounds which contain both an amino group and a carboxylic group. Proteins are made up of 20 essential amino acids.

Monomer means a small molecule of an organic substance i.e, building block in general.

 

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Q:

ATP generally energizes a cellular process by

A) direct chemical transfer of a phosphate group B) becoming oxidized
C) releasing heat upon hydrolysis D) direct chemical transfer of a sugar group
 
Answer & Explanation Answer: A) direct chemical transfer of a phosphate group

Explanation:

ATP generally energizes a cellular process by direct chemical transfer of a phosphate group.

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Q:

Rank these compounds by boiling point- Pentane, Propane and Hexane.

A) Pentane > Propane > Hexane B) Propane > Pentane > Hexane
C) Hexane > Pentane > Propane D) Propane > Hexane > Pentane
 
Answer & Explanation Answer: C) Hexane > Pentane > Propane

Explanation:

The boiling point of the compounds depend on the number of carbons in them. Hexane has 6, Pentane has 5 and Propane has 3 carbons. As Hexane is with 6 carbons it has highest boiling point and next Pentane with 5 and lowest Propane with 3. 

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Q:

Which of the following can be used as lamp oil?

A) Lipids B) Carbohydrates
C) Proteins D) Nucleic acids
 
Answer & Explanation Answer: A) Lipids

Explanation:
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Q:

Technically, tempera is paint in which the vehicle is in

A) an emulsion B) a pigment
C) an impasto D) a ground
 
Answer & Explanation Answer: A) an emulsion

Explanation:
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Q:

Which of the following polysaccharides contains a modified monosaccharide?

A) starch B) chitin
C) glycogen D) cellulose
 
Answer & Explanation Answer: B) chitin

Explanation:

Many carbohydrates contain one or more modified monosaccharide units that have had one or more groups replaced or removed.

 

Chitin is one of many naturally occurring polymers. It is one of the most abundant natural materials in the world. Over time it is bio-degradable in the natural environment. Its breakdown may be catalyzed by enzymes called chitinases, secreted by microorganisms such as bacteria and fungi, and produced by some plants.

 

Chitin is composed of repeating units of N-acetylglucosamine, a nitrogen-containing form of glucose.

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Q:

PAS  is a drug used in the treatment of 

A) tuberculosis B) Cancer
C) typhoid D) malaria
 
Answer & Explanation Answer: A) tuberculosis

Explanation:

Para-amino salicyclic acid (PAS) is used in the treatment of Tuberculosis.

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