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1
JEE Main 2019 (Online) 10th January Evening Slot
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Haemoglobin and gold sol are examples of :
A
positively charged sols
B
negatively charged sols
C
Positively and negatively charged sols, respectively
D
negatively and positively charged sols, respectively
2
JEE Main 2019 (Online) 10th January Morning Slot
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Which of the following is not an example of heterogenous catalytic reaction?
A
Ostwald's process
B
Combustion of coal
C
Hydrogenation of vegetable oils
D
Haber's process
3
JEE Main 2019 (Online) 9th January Evening Slot
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For coagulation of arsenious sulphate sol, which one of the following salt solution will be most effective ?
A
BaCl2
B
AlCl3
C
NaCl
D
Na3PO4
4
JEE Main 2019 (Online) 9th January Morning Slot
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Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, x is the mass of the gas adsorbed on mass m of the adsorbent at pressure P. $${x \over m}$$ is proportional to :

JEE Main 2019 (Online) 9th January Morning Slot Chemistry - Surface Chemistry Question 95 English
A
P2
B
P$${^{{1 \over 4}}}$$
C
P$${^{{1 \over 2}}}$$
D
P
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