Chemistry Questions

Q:

Glycolysis is the conversion of

A) Glucose to pyruvate B) Glucose to proteins
C) Pyruvate to glucose D) All of the above
 
Answer & Explanation Answer: A) Glucose to pyruvate

Explanation:

Glycolysis is the metabolic process of converting 1 molecule of glucose to 2 molecules of pyruvate through a series of 10 enzyme catalyzed reactions.

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Q:

Which of the following is an Inert Gas?

A) Hydrogen B) Nitrogen
C) Oxygen D) Argon
 
Answer & Explanation Answer: D) Argon

Explanation:
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Q:

Brownish film formed on iron when left in open is called?

A) Dust B) Shovel
C) Spade D) Rust
 
Answer & Explanation Answer: D) Rust

Explanation:
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Q:

An atom that loses or gains electrons is called

A) Proton B) Ion
C) Isotope D) Neutron
 
Answer & Explanation Answer: B) Ion

Explanation:

An atom that loses or gains electrons is called as ion. Gaining of electron is negative charge and is called as Anion and lossing of eectron is called Cation.

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Q:

The principal quantum number indicates what property of an electron?

A) energy of electron B) distance of electron from nucleus
C) both a & b D) number of subshells
 
Answer & Explanation Answer: C) both a & b

Explanation:

The principal quantum number is the property of an electron which determines the energy of electron and the distance of electron from the nucleus of an atom.

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Q:

Which formula represents a polar molecule?

A) C - O B) C - N
C) H - N D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

A chemical bond in which the electrons are not shared equally due to differences in the electronegativity of the atoms.

 

The polarity of a covalent bond is measured using its dipole moment.

 Large dipole moment = more polar

 Small dipole moment = more nonpolar.

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Q:

Which one of the following elements does not form solid hydrogen carbonate?

A) Sodium B) Potassium
C) Caesium D) Lithium
 
Answer & Explanation Answer: D) Lithium

Explanation:

Potassium bicarbonate (also known as potassium hydrogen carbonate or potassium acid carbonate) is the inorganic compound with the chemical formula KHCO3. It is a white solid

Sodium bicarbonate is a white solid that is crystalline, but often appears as a fine powder.

LiHCO3 is found in solution form while rest alkali metals hydrogen carbonates are solid due to the anomalous properties of Li and its diagonal relationship with the Mg.

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Q:

Which of the following is a property of sodium hydroxide?

A) It is insoluble in ether and other Non-polar solvents B) It is slowly soluble in water
C) It has an odor of rotten egg smell D) All the above
 
Answer & Explanation Answer: A) It is insoluble in ether and other Non-polar solvents

Explanation:

Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na+ and hydroxide anions OH−.

Properties:

1. It is highly soluble in water, and readily absorbs moisture and carbon dioxide from the air.

2. NaOH is insoluble in ether and other non-polar solvents.

3. It is an odorless compound.

 

Uses:

Sodium hydroxide is used in many industries: in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents, and as a drain cleaner.

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