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 Chemistry Questions

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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:

Which base is present in soap?

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

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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

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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:

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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2 2077
Q:

What is the value of triple point (solid, liquid and gas) of Water?

A) 273.16° C B) -273.16 K
C) 273.16 K D) 0° C
 
Answer & Explanation Answer: C) 273.16 K

Explanation:

The temperature at which a substance can exist in equilibrium in the liquid, solid, and gaseous states. The triple point of pure water is at 0.01°C (273.16K, 32.01°F).

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