Chemistry Questions

Q:

Which one phosphorylates ADP to make ATP?

Answer

ATP synthase Phosphorylates ADP to make ATP.

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Q:

After cleaning the thermometer should be placed in

A) Sanitizer B) Ice cold water
C) Mercury D) None of the above
 
Answer & Explanation Answer: A) Sanitizer

Explanation:
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Q:

Which substance contains metallic bonds?

A) C6H12O6 B) Hg
C) H2O D) NaCl
 
Answer & Explanation Answer: B) Hg

Explanation:

Metallic bond is a bond between two metal atoms. Here in the given option Hg is the only metal with metallic bond.

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Q:

The relationship between a cathode and an anode involves

A) Electrons B) Neutrons
C) Protons D) Diodes
 
Answer & Explanation Answer: A) Electrons

Explanation:

The relationship between a cathode and an anode involves the transfer of electric charge between them. The cathode is the negative terminal on the battery, which has zero electric potential. The anode is the positive terminal on the battery and has the battery's maximum electric potential. Current flows from the battery's anode (positive terminal) to the cathode (negative terminal). In electron flow, electrons leave the negative side of the battery and move towards the positive side of the battery.

 

Hence, The relationship between a cathode and an anode involves Electrons.

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Q:

Which is the best definition of activation energy?

A) the energy required to break the bonds of reactant molecules B) the energy required to end a chemical reaction
C) the energy required to bind a substrate to an active site D) the energy required to re-form bonds in product molecules
 
Answer & Explanation Answer: A) the energy required to break the bonds of reactant molecules

Explanation:

Activation energy is a minimum amount of energy that required for the chemical reaction to happen or to take place.

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Q:

The current atomic model would be revised if 

A) better microscopes are invented in the future B) a new element is discovered in the future
C) better microscopes were being used to study its structure D) new information about an atoms structure is discovered
 
Answer & Explanation Answer: D) new information about an atoms structure is discovered

Explanation:
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Q:

What are cathode rays made of?

Answer

Cathode rays made of beams of electrons.

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Q:

Which statement best describes the electronegativity of an element?

A) Electronegativity of an atom is it's ability to produce energy while losing an electron. B) Electronegativity of an atom is it's ability to attract electrons during bond formation.
C) Electronegativity of an atom is it's ability to lose electrons during cation formation. D) Electronegativity of an atom is it's ability to share electrons during a covalent bond formation.
 
Answer & Explanation Answer: B) Electronegativity of an atom is it's ability to attract electrons during bond formation.

Explanation:

Electronegativity, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons (or electron density) towards itself.

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