Chemistry Fully solved questions with complete explanation for written test, interview, competitive exams and entrance test. This section is very useful for those who are preparing for competitive exams such as Written test of IT companies,Bank Exams, CAT Exams, GATE Exams, Railway Exams, SSC, UPSC, Defence and many more.

Q. Goldsmiths uses aqua regia, which is prepared by mixing

  • A) Nitric acid and Sulphuric acid 
  • B) Nitric acid and Hydrochloric acid 
  • C) Sulphuric acid and Hydrochloric acid 
  • D) Citric acid and Benzoic acid 
Q. Which is not a Lewis acid?

  • A) AlCl3
  • B) BF3
  • C) NH3
  • D) FeCl3
Q. Sodawater-obtained by passing carbon dioxide in water is

  • A) An oxidising agent  
  • B) Basic in nature
  • C) Acidic in nature
  • D) A reducing agent
Q. What is Nila thotha?

  • A) Copper Sulphate
  • B)  Calcium Sulphate
  • C)  Iron Sulphate 
  • D) Sodium Sulphate
Q. Which acid is used in photography

  • A) Formic acid 
  • B) Oxalic acid
  • C) Citric acid
  • D) Acetic acid
Today's Challenging Question
Q. Ajay & Bimal can do a price of work in 10 days, Bimal & Chetan can do in 15 days and Chetan and Ajay in 20 days. They work together for 6 days and then Ajay leaves and now Bimal & Chetan work together for 4 more days. If Bimal leaves, how long will Chetan take to finish the work?
A) 12 days
B) 10 days
C) 16 days
D) none
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