SINDH MDCAT 2017 PAPER MDCAT 2017 ( PART 5 ) 1. A correct formula must: Always have subscripts Always conform to the valency rules Be balanced with proper coefficients Always conforms to the law of multiple proportions 2. A compound was found to contain nitrogen and oxygen in the ratio 28 g: 80 g. The formula of the compound Is: N2O5 NO N2O3 N2O4 3. When ß-particle are sent through a thin metal foil, most of them go straight through the foil as: Most part of the atom is empty space ß-particles move with high velocity ß-particles are positively charged ß-particles are much heavier than electrons 4. Electronic Configuration of M^2+ Ion is 2, 8, 14 and Its atomic weight is 56 amu. The number of neutrons In Its nucleus are: 30 32 52 42 5. The quantum numbers +1/2 and -1/2 for the electron spin represent: Magnetic movement of the electron pointing up and down respectively Rotation or the electron In anticlockwise and clockwise direction respectively Two quantum mechanical spin states which have no classical analogue Rotation of the electron In clockwise and anticlockwise direction respectively 6. 1 liter of a gas weighs 2 g at 300 K and 1 atm pressure_ If the pressure is made 75 atm, at which of the following temperatures will 1 L of the same gas weigh 1 g? 600 K 450 K 800 K 900 K 7. Which of the following pairs of gases has same rate of diffusion? CO2 and N20 CO2 and N204 CO2 and CO NO2 and CO2 8. For the equilibrium reaction 2NO2 ⇔ N204(g) + 61KJ, increase of temperature would Favour the decomposition of N204 Favour the formation of N204 No effect on equilibrium Stop the reaction 9. What would be the major product of the following reaction ? 10. The value K for H2 (g)+ CO2 (g)____ H20 (g) +CO2 (g) is 1.80 at 1000°C. If 1.0 mole of each H2 and CO2 are place in 1 litre flask, the final equilibrium concentration of CO at 1000°C will be: 0.473 M 0.295 M 0.531 M 0.385 M Loading … Pages: 1 2 3 4 5 6 7 8 9 10
