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Chemistry

Chemistry
Which among the following is used as a catalyst in the production of high octane fuels?

HNO3
HF
HCl
H2SO4

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Chemistry
Atoms having the same number of protons but different number of neutrons are called :

Isotopes
Higgs-boson
Cations
Anions

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Chemistry
Suspension particles have the size between

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

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Chemistry
The chief source for the production of nitrogeneous fertilizers is :

Ammonia
Nitric acid
Nitrogen dioxide
Nitrogen

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Chemistry
Stalactites and Stalagmites form due to the precipitation of :

CaCO3
MgCl2
MgCO3
CaCl2

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Chemistry
The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is

4.84 x 1017
6.023 x 1023
1.568 x 103
6.023 x 1019

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