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Chemistry

Chemistry
The cathode of a lead storage battery is made up of

Zinc
Lead
Manganese dioxide
Lead oxide

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Chemistry
Ethylene is a ________ molecule.

Covalent
Nonpolar
Polar
Ionic

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Chemistry
The nuclear particles which are assumed to hold the nucleons together are

mesons
neutrons
positrons
electrons

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Chemistry
High concentration hydrocarbon pollutants in atmospheric air causes

Respiratory diseases (e.g.asthma)
Cancer
Reduced crop yield
Silicosis

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Chemistry
Gobar gas mainly contains

Methane
Carbon dioxide
Carbon monoxide
Hydrogen sulphide

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

Escherichia coli
Pseudomonas putida
Bacillus subtilis
Saccharomyces cerevisiae

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