Q.4 Which of the following of will have the same number of

Size: px

Start display at page:

Download "Q.4 Which of the following of will have the same number of"

Rosamond Sherman
6 years ago
Views:

1 year n0te chemitry new t Chapter 3rd GASES MCQ Q.1 The order of the rate of diffuion of gae NH3, SO2, Cl2 and CO2 i: (a) NH3 > SO2 > Cl2 > CO2 (b) NH3 > CO2 > SO2 > Cl2 Cl2> SO2 > CO2 > NH3 None of thee Q.2 Preure remaining contant at which temperature the volume of ga will become twice of what it i at 0C. (a) 546 oc (b) 200 oc 546 K 273 K Q.3 Equal mae of methane and oxygen are mixed in an empty container at 25oC. The fraction of the total preure exerted by the oxygen i: (a) (b) Q.4 Which of the following of will have the ame number of molecule at STP? (a) 280 cm3 of CO2 and 280 cm3 of N2O (b) 11.2 dm3 of O2 and 32 g of O2 1

2 year n0te chemitry new t 44g of CO2 and 11.2 dm3 of CO 28g of N2 and 5.6 dm3 of oxygen 2

3 year n0te chemitry new t Q.5 Number of molecule in one dm3 of water i cloe to: (a) x 1023 (b) x 1023 x x 6.02 x 1023 Q.6 If abolute temperature of a ga i doubled and the preure i reduced to one half the volume of ga will. (a) remain unchanged (b) increae four time reduce to be double Q.7 How hould the condition be changed to prevent the volume of a given ma of ga from expanding when it ma i increaed (a) temperature i lowered and preure i increaed (b) temperature i increaed and the preure i lowered temperature and preure both are lowered temperature and preure both are increaed Q.8 The molar volume of CO2 i maximum at (a) STP (b) 127 oc and 1 atm 0 oc and 2 atm 273 oc and 2 atm Q.9 Gae deviate from ideal behaviour at high preure. Which of the following i correct for non ideality? (a) At high preure, the ga molecule move in one direction only (b) At high preure, the colliion between, the ga molecule are increaed manifold At high preure, the volume of ga become inignificant AT high preure, the intermolecular attraction, become ignificant Q.10 The deviation of a ga from ideal behaviour i maximum at, (a) 10 oc and 5.0 atm (b) 10 oc and 2.0 atm 100 oc and 2.0 atm 0 oc and 2.0 atm 3

4 year n0te chemitry new t Q.11 At high temperature iotherm move away from both the axi becaue of increae in, (a) preure (b) volume no. of mole all above Q.12 Value of Charle law contant K depend upon. (a) ma of ga (b) preure ga no. of mole of ga all above Q.13 Equal volume of H2 and He are inerted in the ame veel. The preure exerted by H2 and He are in the ratio: (a) 1:1 (b) 2:1 1:2 all above Q.14 Which of the following have ame no. of molecule at STP (a) 1000 cm3 of N2H4 and O2 (b) 200 cm3 of CO2 and N2O 50 cm3 each of CO and N2 all above Q.15 If abolute temperature i doubled and the preure i increaed 4 time. The volume i (a) half (b) double four time remain the changed Q.16 Denity of a ga i uually expreed in (a) kg m3 (b) kg dm3 g dm 3 g cm 3 Q.17 Unit of ga contant R in SI ytem i: (a) dm3 atm k 1 mol 1 (b) 82.1 cm3 atm k Nm k 1 mol cal k 1 mol 1 Q.18 Concept of ditribution of velocitie among the ga molecule wa developed by (a) Claudiu (b) Maxwell Boltzman Vanderwaal Q.19 Abolute temperature of ga i proportional to 4

5 year n0te chemitry new t (a) tranlational kinetic energy (b) rotational kinetic energy vibrational kinetic energy potential energy Q.20 Deviation a ga from ideal behaviour i maximum at (a) low temperature, low preure (b) low temperature, high preure high temperature, low preure high temperature high preure Q.21 Mot ideal ga at room temperature i: (a) CO2 (b) NH3 SO2 N2 Q dm3 of variou ideal gae at STP will have Avogadro number of molecule (a) 6.02 x 1023 (b) 6.02 x x x 1022 Q.23 Gae are ideal at (a) low preure and high temperature (b) low temperature and high preure high preure and high temperature low preure and low temperature Q.24 The value of compreibility factor for an ideal ga i equal to: (a) 1 (b) Q.25 An ideal ga obey (a) Boyle law (b) Charle law Avogadro law all above Q.26 A real ga obeying Vander Waal equation will reemble ideal ga if: (a) (b) both a and b are large both a and b are mall a i mall and b i large a i large and b i mall 5

6 year n0te chemitry new t Q.27 Deep ea diver breath mixture of nitrogen and oxygen in a ratio of: (a) 96% N2 and 4% O2 (b) 4% and N2 and 96% O2 80% N2 and 20% O2 20% N2 and 80% O2 Q.28 One mole of any ga at STP occupie volume (a) 2.24 dm3 (b) 22.4 dm dm dm3 Q.29 K.E. of ga molecule i equal to: (a) (b) m v2 Q.30 All gae olidify before reaching at (a) 373 ok (b) 273 oc 473 oc 0 ok Q.31 Kinetic equation i equal to (a) P V = n R T (b) P V = R T PV = m n c2 PV = m n c2 Q.32 Root mean quare velocity i equal to (a) (b) Q.33 Kinetic energy aociated with one molecule of a ga due to tranlational motion i given by (a) EK = (b) Ek = m v2 Ek = m n c2 Ek = Q.34 Denity of ga i uually expreed a (a) kg m 3 (b) kg dm 3 g dm 3 g cm 3 Q.35 Weight of one dm3 of O2 at STP i (a) gm (b) gm gm gm ANSWERS Quetion

7 year n0te chemitry new t Anwer b c a a a Quetion Anwer b a b d a Quetion Anwer b d a d a Quetion Anwer c c b a b Quetion Anwer d a a a d Quetion Anwer b a b d d Quetion Anwer c a a c a 7

Chapter 10 Gases. Measurement of pressure: Barometer Manometer Units. Relationship of pressure and volume (Boyle s Law)

Chapter 10 Gases. Measurement of pressure: Barometer Manometer Units. Relationship of pressure and volume (Boyle s Law) Chapter 10 Gases Conditions of ideal gases: Ideal gases have no attractive forces between the molecules. the atoms volume taken into account when looking at the volume a gas occupies. Low pressure and