NCERT Class 11 Chemistry very short Questions & Answers
NCERT Class 11 Chemistry
QUESTIONS
NCERT Class 11 Chemistry very short Questions & Answers
31 In vulcanisation, natural rubber is heated with
A Sulphur
B Phosphorus
C carbon
D Silicon
32 What are soaps?
A Sodium, salts of heavier fatty acids
B Mixture of glycerol and alcohols
C Esters of heavy fatty acids
D Salts of silicates
Answer: Sodium, salts of heavier fatty acids
33 Which one of the following is an element ?
A Diamond
B Sapphire
C Topaz
D Ruby
34 Which one of the following is correct ? Butter is
A A super cooled oil
B an emulsion
C a molecular solid
D none of these
35 Quick silver is another name for
A Mercury
B Copper
C Silver
D Aluminium
36 Which one of the following contains maximum percentage of nitrogen by mass?
A Ammonium nitrate
B Ammonium carbonate
C Urea
D Ammonium cyanide
37 The National Chemical Laboratory(India) is located in
A Pune
B Hyderabad
C Bengaluru
D Mumbai
38 Camphor can easily be purified by the process of
A Sedimentation
B Sublimation
C Distillation
D Crystallization
39 Another name for mercurous chloride is
A Plaster of paris
B Blue vitriol
C Amalgam
D Calomel
40 Which metal is commonly used for making an electromagnet?
A Iron
B Nickel
C Cobalt
D Copper