[VSQ]Chemistry Q&A For All Competitive Exam||Set 12

 Chemistry Q&A For All Competitive Exam

✱✱Q1. 

Main ore of Mercury is? 

⇒Cinnabar

✱✱Q2. 

Egg shell is made up of? 

⇒Calcium Carbonate

✱✱Q3. 

Common preservative in food processing industry is? 

⇒Benzoic Acid

✱✱Q4. 

First organic compound synthesized in laboratory & by whom? 

⇒Urea by Friedrich Wöhler

✱✱Q5. 

What blackens silver’s shine? 

⇒Ozone Gas

✱✱Q6. 

Which metal is used in Photoelectric cell?

⇒Selenium

✱✱Q7. 

Barium Hydroxide is also known as? 

⇒Baryta Water

✱✱Q8.

 ______ elements are non-metal. 

⇒Electronegative

✱✱Q9.

 __________ is known as heavy water and used in nuclear reactor as moderator.

⇒Deuterium Oxide (D2O)

✱✱Q10. 

Deuterium is ______ of Hydrogen. 

⇒Isotope

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