1251. Device used to measure atmospheric pressure is :

A. Stalagmometer
B. Barometer *
C. Viscometer
D. Pycnometer

1252. At certain pressure, the volume of gas at 25 degree centigrade is 20 L . If pressure and temperature are doubled the volume will be :

A. 20 L *
B. 40 L
C. 10 L
D. 5 L

1253. Under which conditions , the relationship between volumes and moles can be plotted :

A. Constant T and P *
B. Constant N and P
C. Constant V and P
D. Constant P an V

1254. 7.5 g of gas occupy 5.6 L of volume at STP .The gas is :

A. NO *
B. N2O
C. CO
D. CO2

1255. 56 g of N2, 44 g of CO2, and 16 g of CH4 make up a gaseous mixture, which has a total pressure of 720 mm of Hg. Methane has the partial pressure of:

A. 75 torr
B. 160 torr
C. 180 torr *
D. 220 torr

1256. If two moles of and ideal gas at 540 K has volume 44.8 L, Then its pressure will be approximately:

A. 1 ATM
B. 2 ATM *
C. 3 ATM
D. 4 ATM

1257. A gas diffuses four times quickly as oxygen gas .The molecular weight of gas is :

A. 2 *
B. 4
C. 6
D. 8

1258. Helium gas has _________ times high diffusion rate than SO2 gas:

A. Two
B. Four *
C. Eight
D. Sixteen

1259. The compressibility factor of an ideal gas is :

A. 1 *
B. 2
C. 3
D. 4

1260. The temperature below which a gas be liquefied by applying pressure is :

A. Inversion Temp
B. Critical Temp *
C. Normal Temp
D. Absolute Zero