Chemistry - MOST IMPORTANT UPSC CSE Previous Year Questions
Practice real questions from previous year exams of UPSC CSE.
Which one of the following is used for dating archaeological specimens in wood, bones and shells?
Acid precipitation is now regarded as a serious problem in some European and Asian countries. Its major cause or source is:
Which one of the following colloidal systems is represented by fog?
The Government of India has totally banned the export of ‘Burnt Coal' (Jhama), because it contains recoverable amount of a metal/element used in transistors. Which one is the element?
Assertions (A): A mixture of salt and ice gives temperature below 0°C.
Reason (R): The salt raises the freezing point of ice.
In the context of the above two statements, which one of the following is correct?
Vinegar is an aqueous solution of:
Monazite is an ore of
Galvanised iron sheets are protected from rusting due to the presence of a layer of
Which one of the following fuels causes minimum environmental pollution?
The chemical used as a 'fixer' in photography is:
Which one of the following polymers is widely used for making bullet proof material?
Which one of the following is a mixed fertilizer?
Which one of the following statements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance?
Which one of the following is an active component of oil clove?
Which one of the following is paramagnetic in nature?
The most reactive among the halogens is
Match List-I with List-II and select the correct answer using the codes given below the lists:
List-I
A. Potassium bromide
B. Potassium nitrate
C. Potassium sulphate
D. Monopotassium Tartarate
List-II
- Fertilizer
- Photography
- Bakery
- Gun-power
Consider the following statements about acetylene:
- It is used in welding industry.
- It is a raw material for preparing plastics.
- It is easily obtained by mixing silicon carbide and water.
Of these statements
Which one of the following elements is essential for the construction of nuclear reactors?
Assertion (A): Sodium metal is stored under Kerosene.
Reason (R): Metallic sodium melts when exposed to air.