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Chemistry

Chemistry
Interveinal necrotic spots on leaves appear due to

SO2injury
O3injury
NO2injury
HF injury

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Chemistry
Silver halides are used in photographic plates because they are

Reduced by light
Oxidised in air
Totally colourless
Soluble in hyposolution

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Chemistry
The buffer action of blood is due to the presence of

[HCO3]– and H2CO3
CI– and [CO3]2–
HCI and NaCI
CI– and [HCO3]–

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Chemistry
The unit to measure the flow of water is

Ohm meter
Cusecs
Micro Mho
Milli curie

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Chemistry
Who modified Bohr's theory by introducing elliptical orbits for electron path

Rutherford
Hund
Sommerfeld
Thomson

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Chemistry
The electronic configuration of an atom having atomic number ‘20’ is

2, 10, 8
2, 6, 8, 4
2, 8, 10
2, 8, 8, 2

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