Science Chemistry questions from IAS 2000.
Most of the explosions in mines occur due to the mixing of
Match List I with List II and select the correct answer using the codes given below the Lists: List I | List II I. German Silver | A) Tin II. Solder | B) Nickel III. Bleaching Powder | C) Sodium IV. Hypo | D) Chlorine
Aluminium surfaces are often ‘anodized’. This means the deposition of a layer of
Assertion (A): Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluorocarbons. Reason (R): Ammonia can be liquified at ambient temperatures at low pressures.
Soft drinks such as colas contain significant quantities of
Consider the following statements: Hard water is not suitable for 1. drinking. 2. washing clothes with soap. 3. use in boilers. 4. irrigating crops. Which of these statements are correct?
Match List I (Industrial processes) with List II (Industry with which associated) and select the correct answer using the codes given below the Lists: List I | List II I. Cracking | A) Rubber II. Smelting | B) Petroleum III. Hydrogenation | C) Copper IV. Vulcanization | D) Edible fats Codes:
A small pouch containing silica gel is often found in bottles of medicine in tablet or powder form because silica gel
Which one of the following materials is very hard and very ductile?