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Chemistry

Chemistry
Interveinal necrotic spots on leaves appear due to

NO2injury
O3injury
HF injury
SO2injury

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Chemistry
The material used in the manufacture of lead pencil is

Mica
Graphite
Carbon
Lead

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Chemistry
Which of the following is the maximum number of electrons that can be present in M-shell?

18
32
8
2

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Chemistry
The chemical name of 'Hypo' commonly used in photography is

Silver nitrate
Sodium nitrate
Silver iodide
Sodium thiosulphate

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Chemistry
Which of the following partial miscible liquid pairs has both lower and upper critical solution temperature

Water and Phenol
Glycerine and m-toluene
Aniline and n-hexane
Water and diethyl aniline

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Chemistry
The iron ore which contains 72% of iron is :

Haematite
Siderite
Limonite
Magnetite

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