RRB GROUP D Chemistry Quiz - 26

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Question 1:

Tooth enamel is made up of which one of the following calcium compounds ?

Question 2:

First ionization enthalpy of aluminium is lower than that of magnesium. Which of the following reason is correct?

Question 3:

Which of the following statement is incorrect about electrical conductance?

Question 4:

16 g of oxygen gas has same number of moles as 

Question 5:

Which one of the following represents the correct order of electron releasing tendency of metals?