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Chemistry

Chemistry
The chief constituent of vinegar is

Acetic acid
Salycylic acid
Formic acid
Oxalic acid

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Chemistry
The constituents of automobile exhaust that can cause cancer is/are :

Polycyclic hydrocarbons
Lead
Carbon monoxide
Oxides of nitrogen

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Chemistry
Threshold limit value of copper in the atmospheric air is

0.01 mg/m3
0.001 mg/m3
5.0 mg/m3
1.0 mg/m3

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Chemistry
The chemical name of quartz is

Calcium phosphate
Calcium oxide
Sodium phosphate
Sodium silicate

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Chemistry
Cement containing excess amount of lime

Becomes more strong
Is quick setting
Cracks during setting
Is slow setting

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Chemistry
Suspension particles have the size between

10–8 – 10–10cm
10–5 – 10–7cm
10–2 – 10–4 cm
10–1 – 10–2 cm

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