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Chemistry

Chemistry
Which of the following molecules has a bond order of 2.5

CO
F2
HCL
NO

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Chemistry
The important ore of aluminium is

Haematite
Fluorspar
Bauxite
Cryolite

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Chemistry
The metal used to galvanise iron to protect it from rusting is

Lead
Zinc
Antimony
Chromium

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Chemistry
Match the List-I with List-II and select the correct answer using the codes given below the listsList-I (Green house gas)List-II(Major source)F.Carbondioxide1.Enteric fermentation in cattleG.Methane2.Burning of fossilH.Chloroflro carbons3.Mercury compounds in waste waterJ.Nitrous oxide4.Nylon production 5.Air conditioner and refrigeration unitsCodes :FGHJA.2154B.3421C.3241D.1234

D
B
C
A

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Chemistry
The new strain of bacteria produced by biotechnology in alcohol industry is

Saccharomyces cerevisiae
Escherichia coli
Pseudomonas putida
Bacillus subtilis

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Chemistry
Gobar gas contains mainly :

Methane
Acetylene
Propylene
Ethylene

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