Gaseous State

Gaseous State

The temperature at which H2 has same rms speed (at 1 atm) as that of O2 at NTP is

Q: The temperature at which H2 has same rms speed (at 1 atm) as that of O2 at NTP is

(A) 37 K

(B) 17 K

(C) 512 K

(D) 27 K

Ans: (B)

6 g each of the following gases at 87oC and 750 mm pressure are taken. Which of them will have the least volume

Q: 6 g each of the following gases at 87oC and 750 mm pressure are taken. Which of them will have the least volume

(A) HF

(B) HCl

(C) HBr

(D) HI

Ans: (D)

A sample of gas is at 0oC. The temperature at which its rms speed of the molecule will be doubled is

Q: A sample of gas is at 0oC. The temperature at which its rms speed of the molecule will be doubled is

(A) 103oC

(B) 273oC

(C) 723oC

(D) 818oC

Ans: (D)

A gas cylinder containing cooking gas can withstand a pressure of 14.9 atm. The pressure gauge of cylinder indicates 12 atm at 27°C. Due to sudden fire in building the temperature starts rising. The temperature at which the cylinder will explode is.

Q: A gas cylinder containing cooking gas can withstand a pressure of 14.9 atm. The pressure gauge of cylinder indicates 12 atm at 27°C. Due to sudden fire in building the temperature starts rising. The temperature at which the cylinder will explode is.

(A) 42.5°C

(B) 67.8°C

(C) 99.5°C

(D) 25.7°C

Ans: (C)

3.2g S is heated if occupy a volume of 780 ml at 450°C and 723 mm pressure. Formula of sulphur is

Q: 3.2g S is heated if occupy a volume of 780 ml at 450°C and 723 mm pressure. Formula of sulphur is

(A) S2                                                      

  (B) S

(C) S4                                                       

(D) S8

Ans: (D)