Gases Test 2

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Gases A test from chapter 3 i.e Gases of Chemsitry part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.


1. The order of the rate of diffusion of gases NH3, SO2, Cl2 and CO2 is:
    A) NH3 > SO2 > Cl2 > CO2
    B) NH3 > CO2 > SO2 > Cl2
    C) Cl2> SO2 > CO2 > NH3
    D) none


2. Pressure remaining constant at which temperature the volume of gas will become twice of what it is at 0C.

    A) 546 C
    B) 200 C
    C) 546 K
    D) 273 K


3. 22.414 dm3 of various ideal gases at STP will have Avogadro’s number of molecules

    A) 6.02 x 10^23
    B) 6.02 x 10^24
    C) 0.602 x 10^23
    D) 6.02 x 10^22


4. Which of the following of will have the same number of molecules at STP?

    A) 280 cm3 of CO2 and 280 cm3 of N2O
    B) 11.2 dm3 of O2 and 32 g of O2
    C) 44g of CO2 and 11.2 dm3 of CO
    D) 28g of N2 and 5.6 dm3 of oxygen


5. Most ideal gas at room temperature is

    A) CO2
    B) NH3
    C) SO2
    D) N2


6. If absolute temperature of a gas is doubled and the pressure is reduced to one half the volume of gas will.

    A) remain unchanged
    B) increases four times
    C) reduce to
    D) be double


7. How should the conditions be changed to prevent the volume of a given mass of gas from expanding when its mass is increased

    A) temperature is lowered and pressure is increased
    B) temperature is increased and the pressure is lowered
    C) temperature and pressure both are lowered
    D) temperature and pressure both are increased


8. The molar volume of CO2 is maximum at

    A) STP
    B) 127 oC and 1 atm
    C) 0 oC and 2 atm
    D) 273 oC and 2 atm


9. Gases deviate from ideal behaviour at high pressure. Which of the following is correct for non–ideality?

    A) At high pressure, the gas molecules move in one direction only
    B) At high pressure, the collisions between, the gas molecules are increased manifold
    C) At high pressure, the volume of gas becomes insignificant
    D) AT high pressure, the intermolecular attractions, become significant


10. The deviation of a gas from ideal behaviour is maximum at,

    A) – 10 oC and 5.0 atm
    B) – 10 oC and 2.0 atm
    C) 100 oC and 2.0 atm
    D) 0 oC and 2.0 atm

I am Mechatronics and Control Engineer from UET, Lahore. Helping Engineering students gives me pleasure.

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