Guess Paper – 2011
CBSE Class – XI
(Chemistry)
(States Of Matter)
Q1. A vessel of 120 ml capacity contains a certain amount of gas at 35
°C and 1.2 bar pressure. The gas is transferred to another vessel of volume 180
ml at 35 °C. What would be its pressure?
Q2. What will be the pressure of the gaseous mixture when 0.5 L of H2 at
0.8 bar and 2.0 L of dioxygen at 0.7 bar are introduced in a 1L vessel at 27°C?
Q3. A student forgot to add the reaction mixture to the round bottomed
flask at 27 °C but instead he/she placed the flask on the flame. After a lapse
of time, he realized his mistake, and using a pyrometer he found the temperature
of the flask was 477 °C. What fraction of air would have been expelled out?
Q4. What will be the pressure exerted by a mixture of 3.2 g of methane
and 4.4 g of carbon dioxide contained in a 9 dm3 flask at 27 °C ?
Q5. At 0°C, the density of a certain oxide of a gas at 2 bar is same as
that of dinitrogen at 5 bar. What is the molecular mass of the oxide?
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