Download App

Solutions — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistrySolutions2 Marks
Question
State Henry’s law and write its two applications.
✓

Answer

Henry’s law states that “the partial pressure of the gas in vapour phase (p) is proportional to the mole fraction of the gas (x) in the solution”:
  1. To increase the solubility of CO2 in soft drinks.
  2. At high altitudes the partial pressure of oxygen is less than that at the ground level. This leads to low concentrations of oxygen in the blood and tissues of people living at high altitudes or climbers.
  3. Scuba divers must cope with high concentrations of dissolved gases while breathing air at high pressure underwater. Increased pressure increases the solubility of atmospheric gases in blood.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Short Answer Type Questions [2M]" from Solutions→Solutions — all question types→Chemistry STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

Explain the preparation of ketones from acyl chlorides.
→
The vapour pressure of water is 12.3 kPa at 300 K. Calculate vapour pressure of 1 molal solution of a non-volatile solute in it.
→
Lithium forms bcc crystals. Calculate the atomic radius of lithium if the length of the side of a unit cell of lithium is 351 pm.
→
Match the reactions given in Column I with the suitable reagents given in Column II. 
 
Column I
(Reactions)
 
Column II
(Reagents)
(i)
Benzophenone → Diphenylmethane
(a)
LiAlH4
(ii)
enzaldehyde → 1-Phenylethanol
(b)
DIBAL—H
(iii)
Cyclohexanone → Cyclohexanol
(c)
Zn(Hg)/Conc. HCl
(iv)
Phenyl benzoate → Benzaldehyde
(d)
CH3MgBr
→
Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL of water at 37°C.
→
How are vitamins classified? Name the vitamin responsible for the coagulation of blood.
→
Calculate the value of EMF for the cell reaction :
$
\begin{array}{l}
Cu_{(s)}+2 Ag_{(aq)}^{+} \rightarrow Cu_{(aq)}^{2+}+2 Ag_{(s)} \\
E_{Cu^{+2} / Cu}^{o}=0.34 V \text { and } E_{Ag^{+} / Ag}^{o}=0.80 V
\end{array}
$
→
What are nucleic acids? Mention their two important functions.
→
Accomplish the following conversion:
Chlorobenzene to p-chloroaniline.
→
Give the structures of A, B and C in the following reaction:
$\text{C}_6\text{H}_5\text{NO}_2\xrightarrow[]{\text{Fe}/\text{HCl}}\text{A}\xrightarrow[273\text{K}]{\text{HNO}_2}\text{B}\xrightarrow[]{\text{C}_6\text{H}_5\text{OH}}\text{C}$
→