NCERT 11 Chemistry Entrance Exams Questions and Answers
NCERT 11 Chemistry
QUESTIONS
NCERT 11 Chemistry Entrance Exams Questions and Answers
71 Which alloy contains nickel?
A Solder
B Invar
C Brass
D Bronze
72 Which one of the following materials is suitable for water purification?
A Zeolites
B Quartz
C Silicones
D Asbestos
73 Which one of the following is an element which never exhibits positive oxidation state in any of its compounds?
A Fluorine
B Carbon
C Oxygen
D Chlorine
74 Talc contains which one of the following ?
A magnesium,silicon,oxygen
B zinc,tin,sulphur
C calcium,oxygen,tin
D zinc,calcium,oxygen
Answer: magnesium,silicon,oxygen
75 Acid rain contains high levels of
A sulphuric and nitric acids
B carbolic acid
C acetic acid
D oxalic acid
76 Which among the following is in liquid state at normal room temperature?
A Mercury
B Phosphorous
C Sodium
D Copper
77 Which metal remains in the liquid form under normal conditions?
A uranium
B mercury
C zinc
D radium
78 Which one of the following non metals is not a poor conductor of electricity
A Selenium
B Phosphorus
C Sulphur
D Bromine
79 What is the first element of periodic table?
A Hydrogen
B Neon
C Sodium
D Helium
80 The chemical name of laughing gas is
A Nitrous oxide
B Nitrogen peroxide
C Nitric oxide
D Nitrogen dioxide