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What is the role of activated charcoal in gas mask?

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The role of the activation charcoal in gas mask used coal mine is

Charcoal is activated

The pressure of the gas was found to decrease from 720 to 480 mm. When 5g of sample of activated charcoal was kept in a flask of one litre capacity maintained at 27^(@)C . If the density of charcoal is 1.25 gm//mL . The volume of gas adsorbed per gm of charcoal at 480 mm of Hg is :

CBSE COMPLEMENTARY MATERIAL-PRACTICE PAPER 3-Section C
  1. Give one example each of associated colloid and multimolecular colloid...

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  2. Out of BaCl(2) and KCl, which is more effective in causing coagulation...

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  3. What is the role of activated charcoal in gas mask?

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  4. The following data were abtained during the first order thermal decomp...

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  5. Following compounds are given to you. 2-Bromopentane, 2-Bromo-2-methy...

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  6. Give reason for the following SN1 reaction is accompanied by racemis...

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  7. Give reason The dipole moment of chlorobonzene is lower than that of...

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  8. Give reason for the following When NO2 group is present at ortho po...

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  9. Draw geometrical isomer of [Pt (NH3)2 Cl2].

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  10. On the basis of crystal field theory, write the electronic configurati...

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  11. Write hybridisation and magnetic behaviour of the complex [Ni(CO)(4)].

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  12. Which of the following is more stable complex and why? [CO(NH3)6]^(3+...

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  13. A Co-ordination compound CrCl3.6H2O is mixed with AgNO3, 2 moles of Ag...

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  14. Why a solution of [Ni(CN)4]^(2-) is colourless?

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  15. Identify A in the following reactions : (C6H5CH2)2 Cd + 2CH3COCl to ...

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  16. (A), (B) and (C ) are three non-cylic funtional isomers of a carbonyl ...

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  17. (a) Prepare benzoic acid from Ethylbenzene. (c) Why pka" of "F-CH2- ...

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  18. Calculate the e.m.f. of the following cell at 298K: 2Cr(s)+3Fe^(2+)(...

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  19. Why conductivity of electrolyte decreases with decreases in concentrat...

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  20. State Faraday's first law of electrolysis.

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