Chemistry Questions

Q:

Which type of molecules polar or nonpolar dissolves in water?

Answer

In general, polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes.
As water molecules are polar, polar molecules dissolves in water.

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Q:

Which is the most malleable metal?

A) Gold B) Silver
C) Both A & B D) Bronze
 
Answer & Explanation Answer: A) Gold

Explanation:

The most malleable metal is Gold.

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Q:

The chemical name of common salt is

A) Sodium Chloride B) Potassium Nitrate
C) Sodium Nitrate D) Potassium Chloride
 
Answer & Explanation Answer: A) Sodium Chloride

Explanation:

The chemical name of common salt is Sodium Chloride with a chemical formula NaCl.

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Q:

Which two atoms form an ionic bond?

Answer

Ionic bonding is a type of chemical bond in which valence electrons are lost from one atom and gained by another.. This bond generates two oppositely charged ions.


In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.


 


Example ::


One example of an ionic bond is the formation of sodium fluoride, NaF, from a sodium atom and a fluorine atom. In this reaction, the sodium atom loses its single valence electron to the fluorine atom, which has just enough space to accept it. The ions produced are oppositely charged and are attracted to one another due to electrostatic forces.

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Q:

The commonly used coolant in refrigerators is

A) Ammonia B) Nitrogen
C) Freon D) Oxygen
 
Answer & Explanation Answer: C) Freon

Explanation:
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Q:

The chemical name of common salt is

A) Calcium Chloride B) Potassium Chloride
C) Sodium Chloride D) Magnesium Chloride
 
Answer & Explanation Answer: C) Sodium Chloride

Explanation:

The chemical name of common is sodium chloride. Its chemical formula is NaCl.

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Q:

Anaerobic glycolysis occurs without

A) water B) glucose
C) oxygen D) All of the above
 
Answer & Explanation Answer: C) oxygen

Explanation:

Anaerobic glycolysis is the transformation of glucose to lactate when limited amounts of oxygen (O2) are available. 

 

Hence, Anaerobic glycolysis occurs without oxygen.

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Q:

A feature of catabolic reactions is that they

A) occur only in mitochondria B) occur only during loss of body weight
C) involve release of energy D) involve consumption of energy
 
Answer & Explanation Answer: C) involve release of energy

Explanation:
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