Chemistry Questions

Q:

Which base is present in soap?

A) Sodium hydroxide B) Silicon dioxide
C) Calcium hydroxide D) Ammonium hydroxide
 
Answer & Explanation Answer: A) Sodium hydroxide

Explanation:
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Q:

Which element has the lowest ionization energy?

A) He B) Ne
C) Fr D) Rb
 
Answer & Explanation Answer: C) Fr

Explanation:

Ionisation energy is the energy required to remove one mole of electrons from one mole of gaseous atoms. Atoms are more stable when they have full valence shells.


The ionization energy decreases from top to bottom in groups, and increases from left to right across a period.

 

HGence, in this trend Francium (Fr) has the lowest ionization energy.

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Q:

Ethane gas has a slightly ______ taste.

A) sweet B) bitter
C) sour D) salty
 
Answer & Explanation Answer: A) sweet

Explanation:
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Q:

Which element is not a part of a nitrogenous base?

A) Carbon B) Oxygen
C) Phosphorous D) Nitrogen
 
Answer & Explanation Answer: C) Phosphorous

Explanation:

A nitrogenous base is an element that contains nitrogen that have same chemical properties of the base.

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Q:

What types of atoms form covalent bonds?

A) metal and metal B) metal and non metal
C) non metal and non metal D) All of the above
 
Answer & Explanation Answer: C) non metal and non metal

Explanation:

Covalent bonds are bonds formed between two non metals by sharing of electrons in their outer most orbits for stable.

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Q:

During which change is energy absorbed?

A) Exothermic B) Endothermic
C) Both A & B D) Neither A nor B
 
Answer & Explanation Answer: B) Endothermic

Explanation:

Endothermic reaction is the reaction in which energy is obserbed for the change.

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Q:

Synthetic detergents are prepared from

A) potassium salts of higher fatty­acids B) sodium salts of higher fatty­acids
C) hydrocarbons of petroleum D) glycerides
 
Answer & Explanation Answer: C) hydrocarbons of petroleum

Explanation:
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Q:

SO2 Polar or Nonpolar?

Answer

SO2 has a net dipole moment and has a bent shape in its structure as water molecule. Hence it is a polar molecule.

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