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 Chemistry Questions

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Q:

Which is known as carbolic acid?

A) Phenol B) Ethanol
C) Acetic acid D) Oxalic acid
 
Answer & Explanation Answer: A) Phenol

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Q:

What is formed when Carbon Dioxide is passed through Lime Water?

A) Copper Sulphate B) Calcium Carbonate
C) Magnesium Oxide D) Baking Soda
 
Answer & Explanation Answer: B) Calcium Carbonate

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Q:

Among chemical properties, Mendeleev concentrated on the compounds formed by the elements with

A) Hydrogen and Oxygen B) Hydrogen and Sodium
C) Carbon and Hydrogen D) Carbon and Sodium
 
Answer & Explanation Answer: A) Hydrogen and Oxygen

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Q:

Atomic number of which of the following elements is greater than that of Magnesium

A) Neon B) Fluorine
C) Sodium D) Aluminium
 
Answer & Explanation Answer: D) Aluminium

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Q:

Which one of the following triad represents Dobereiner's Triad?

A) Li, Na, K B) Na, Sr, Br
C) Li, K, Na D) Li, Ca, C1
 
Answer & Explanation Answer: A) Li, Na, K

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Q:

What  is  the  number  of  atoms  in  46  g  of sodium-23 (N = Avogadro constant)?

A) N/2 B) N
C) 2N D) 23 N
 
Answer & Explanation Answer: C) 2N

Explanation:
Number of atoms in 46 grams of sodium - 23 will be 2N.
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Q:

Which of the following is not a Halon gas ?

A) methane B) Carbon tetra chloride
C) iodomethane D) bromomethane
 
Answer & Explanation Answer: A) methane

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Q:

The element with the highest electron affinity among halogens is

A) F B) I
C) Cl D) Br
 
Answer & Explanation Answer: C) Cl

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