Answer:
Explanation:
a ) false.
NH₃ is more polar molecule than PH₃ so inter-molucular attraction is greater in NH₃ ( hydrogen bond ) . Hence vapour pressure is low for NH₃ .
b ) false .
The average kinetic energy of boiling water molecules is lower on a mountaintop than it is at sea level. It is so because water boils at lower temperture on mountain and kinetic energy of molecules depends upon temperature .
c ) false
vapour pressure depends upon temperature .
d ) True
CCl4 is more volatile than CBr4
e ) false
vapour pressure increases as temperature increases.
Answer:
A liquid evaporated slow at higher temperature bz the vapour pressure of the is higher so few molecule can escape the surface
Options:
A reverse phase TLC plate because the nonpolar stationary phase will interact with polar compounds more strongly.
A normal phase TLC plate because the polar stationary phase will interact with polar compounds more strongly.
A reverse phase TLC plate because the polar stationary phase will interact with polar compounds more strongly.
A normal phase TLC plate because the nonpolar stationary phase will interact with nonpolar compounds more strongly.
Answer:A normal phase TLC plate because the polar stationary phase will interact with polar compounds more strongly.
Explanation:TLC(THIN LAYER CHROMATOGRAPHY) is a solid (stationary phase) and a liquid(mobile phase) technique of separation and purity determination that uses the principle of that different compounds have different adsorption rate and different solubility rate to the two phases between which they are partitioned.
ON A DEVELOPED THIN LAYER CHROMATOGRAPHIC PLATE A PURE COMPOUND WILL APPEAR ONLY ON ONE SPOT.
With TLC one can analyse multiple samples at the same time.
Answer:
n = 0.005 mol
Explanation:
Given data:
Volume = 115 mL
Temperature = 21°C
Pressure = 746 mmHg
Number of moles = ?
Solution:
746 mmHg = 746 /760 = 0.98 atm
21°C = 21+273 = 294 K
115 mL /1000 = 0.115 L
PV = nRT
n = PV/RT
n = 0.98 atm × 0.115 L / 0.0821 atm. L. mol⁻¹. K⁻¹ ×294 K
n = 0.1127 atm. L /24.14 atm. L. mol⁻¹
n = 0.005 mol
