Chemistry MCQ's test 5

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Here is another test for entry test preparation for NUST, PIEAS, UHS, LUMS, GIKI, FAST, AIR, UET, Medical Colleges and Engineering Universities. These are also very helpful for annual exams.

1. The number of moles of CH4 which contains 3.0g of Carbon

A) 1.0
B) 0.75
C) 0.5
D) 0.25

2. Chemical reactions involve

A) Electron
B) Proton
C) Neutron
D) Nucleus

3. Which of the following is not matching pair

A) Residue, filtrate
B) Stationary phase, mobile phase
C) Sublimand, sublimate
D) Crystal, solution

4. In dempster mass spectrometer, the deflection of positive ions of isotopes of an element on the ion collector is not based upon

A) m/e ratio
B) strength of electric field
C) strength of magnetic field
D) e/m ratio

5. Which one of the following gasses shows more deviation from ideal behavior

A) He
B) N2
C) H2
D) CO2

6. The correct set of quantum numbers for unpaired electron in sodium atom is

A) n=2, l=1, m=0
B) n=3, l=0, m=0
C) n=2, l=1, m=1
D) n=3, l=1, m=1

7. The SI unit of a and b constant in vander Waals gas equation is

A) Atm dm6 mol-2 and m3 mol-1
B) Dm-3 mol-1 and Nm4 mol-2
C) Nm4 mol-2 and m3 mol-1
D) All of these

8. The original volume of a gas at 0 C is 273 cm3 at constant pressure. Its volume at 273 C becomes

A) zero cm3
B) 546 cm
C) 446m3
D) 346 cm3

9. When slow moving neutrons hit the Cu-metal the following nuclear reaction takes place. 65 65 1 66 Cu+ n‡ Cu+______ then what type of radiations are emitted 29 0 29

A) alpha rays
B) beta rays
C) gamma rays
D) radiowave

10. when electron of H-atom falls from all the possible higher levels to n=1, then photons of radiation emitted in the region of

A) UV
B) Visible
C) IR
D) Radio wave