Chemistry - MOST IMPORTANT RPSC RAS Previous Year Questions
Practice real questions from previous year exams of RPSC RAS.
📘 Structure of Atom📚 Misc
Q1
Which of the following statement is correct regarding atomic structure?
🎯 RPSC RAS /RTS (Pre) G.S. 1992
📘 Carbon Allotropes📚 Carbon Allotrope (Crystalline)
Q2
Which of the following is lubricant for heavy machines?
🎯 RPSC RAS /RTS (Pre) G.S. Re-Exam. 1999-2000
📘 Important Chemical Compounds📚 Misc
Q3
When eno salt is poured into water, bubbles formed which is due to-
🎯 RPSC RAS /RTS (Pre) G.S. 1999
📘 Chemistry in Everyday Life📚 Medicines (Antacids, Analgesics, etc.)
Q4
Halogen which is used as a painkiller is:
🎯 RPSC RAS /RTS (Pre) G.S. 2012
📘 Chemistry in Everyday Life📚 Common Gases used in daily life (LPG, CNG, etc.)
Q5
Match List-I (Fuel Gases) with List-II (Major Constituents) and select the correct answer using the codes given below:
List I (Fuel Gases)
A. CNG
B. Coal gas
C. LPG
D. Water gas
List II (Major Constituents)
1. Carbon monoxide, Hydrogen
2. Butane, Propane
3. Methane, Ethane
4. Hydrogen, Methane, Carbon monoxide
🎯 RPSC RAS /RTS (Pre) G.S. 2013
📘 Chemistry in Everyday Life📚 Common Gases used in daily life (LPG, CNG, etc.)
Q6
Liquefied petroleum gas (LPG) is the mixture of the following-
🎯 RPSC RAS /RTS(Pre) G.S. 1992
📘 Organic Chemistry📚 Hydrocarbons
Q7
Petrol contains-
🎯 RPSC RAS /RTS (PRE) GS 2009
📘 Acids, Bases and Salts📚 Name of Acid present in compounds
Q8
Which one of the following acid is formed while making yogurt from milk?
🎯 RPSC RAS /RTS (Pre) G.S., 2008
📘 Organic Chemistry📚 Misc
Q9
The artificial structure of first biological chemical in laboratory is:
🎯 RPSC RAS /RTS (PRE) GS 2009
📘 Organic Chemistry📚 Alcohol
Q10
Ethyl alcohol is made unfit for drinking by the addition of the following?
🎯 RPSC RAS /RTS(Pre) G.S. Re-Exam. 1999-2000
📘 Organic Chemistry📚 Alcohol
Q11
Wine is sold in market as degree under proof or over proof. Proof spirit is 57 percent alcohol in volume. Percentage of alcohol in 20 degree under proof wine will approximately-
🎯 RPSC RAS /RTS (Pre) G.S. 1999
📘 Organic Chemistry📚 Aldehyde, Ketone and Carboxylic Acid
Q12
Which of the following statements are correct? A. Sugarcane juice is fermented to form vinegar. B. Vinegar has acetic acid. C. Benzoic acid is the acid present in vinegar. D. Vinegar is used as a preservative.
🎯 RPSC RAS /RTS (Pre) G.S., 2016
📘 Acids, Bases and Salts📚 Physical Properties of Acids
Q13
Which one of the following is organic acid?
🎯 RPSC RAS /RTS (PRE) GS 2009
📘 Chemical Reactions📚 Chemical change
Q14
Which of the following is an example of chemical change?
🎯 RPSC RAS /RTS (Pre) G.S., 2003
📘 Atomic Models📚 Rutherford Atomic Model
Q15
Who discovered atomic nucleus?
🎯 RPSC RAS /RTS (Pre) G.S., 2003
📘 Acids, Bases and Salts📚 Name of Acid present in compounds
Q16
Which of the following acid does not contain oxygen?
🎯 RPSC RAS /RTS(Pre) G.S. 1992
📘 Radioactivity📚 Half-life
Q17
Half life of a radioactive substance is 10 days. It means that-
🎯 RPSC RAS /RTS (Pre), 2006-07
📘 Important Chemical Compounds📚 Baking Soda
Q18
The chemical formula of baking soda is
🎯 RPSC RAS /RTS (Pre) G.S., 2016
📘 Important Chemical Compounds📚 Baking Soda
Q19
Which one of the following is the chemical name for baking soda?
🎯 RPSC RAS /RTS (Pre) G.S. 1993
📘 Important Chemical Compounds📚 Plaster of Paris
Q20
Chemical formula of plaster of paris is
🎯 RPSC RAS /RTS (Pre), 2006-07