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Chemistry

Chemistry
Two moles of an ideal gas expand freely into vacuum. The work done by the gas is

4J
2J
Infinity

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Chemistry
The minimum energy required for an effective collision is

Internal energy
Activation energy
Threshold energy
Free energy

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Chemistry
Milk tastes sour when kept in the open for sometime due to the formation of

Citric acid
Carbonic acid
Lactic acid
Acetic acid

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Chemistry
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

s-electrons in Mg(Z = 12)
p-electrons in Ne(Z = 10)
d-electrons in Fe(Z = 26)
p-electrons in CI(Z = 17)

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Chemistry
Sulphur dioxide present in the industrial chimney exhaust causes

Respiratory and lung disease
Reduction in plant's productivity owing to acid rain
Corrosion building materials
All of these

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Chemistry
Plastic is a type of

Polymer
Acrylic
Polyester
None of these

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