NCERT 11 Chemistry Entrance Exams Questions and Answers

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

Answer: Invar
72 Which one of the following materials is suitable for water purification?
A Zeolites
B Quartz
C Silicones
D Asbestos

Answer: Zeolites
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

Answer: Fluorine
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

Answer: carbolic acid
76 Which among the following is in liquid state at normal room temperature?
A Mercury
B Phosphorous
C Sodium
D Copper

Answer: Mercury
77 Which metal remains in the liquid form under normal conditions?
A uranium
B mercury
C zinc
D radium

Answer: mercury
78 Which one of the following non metals is not a poor conductor of electricity
A Selenium
B Phosphorus
C Sulphur
D Bromine

Answer: Selenium
79 What is the first element of periodic table?
A Hydrogen
B Neon
C Sodium
D Helium

Answer: Hydrogen
80 The chemical name of laughing gas is
A Nitrous oxide
B Nitrogen peroxide
C Nitric oxide
D Nitrogen dioxide

Answer: Nitrous oxide

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