Basic Concepts Set 1 - ilmijazeera

Results

#1. Isotopes when even atomic masses are a comparatively abundant

demper’s spectrograph is superior to that of Aston’s

0.1 mg of H2O has greater number of molecules then 0.1 mg of CH4

the number of H+ and PO–3 ions are not equal but the number of positive and negative charges

are equal when 100 molecules of H3PO4 are thrown in excess of water

#2. A molecule having two atoms is called

monoatomic molecules

diatomic molecules

Polyatomic molecules

homoatomic molecule

#3. An ordinary microscope is used to measure the object of size

upto 500 nm

upto 1000 nm

upto 1200 nm

#4. 1 atomic masses unit (amu) is equation

1.66 x 10–27 kg

1.56 x 10–27 kg

1.76 x 10–21 kg

1.8 x 10–27 kg

#5. Nickel has isotopes

#6. Cadmium has isotopes

#7. The pressure of vapours in the separating isotopes by mass spectrometry is kept at

10–6 torr

10–4 torr

10–3 torr

10–5 torr

#8. Number of gram atoms in 0.1 gm of Na is

0.0043

0.0403

0.403

None of these

#9. Molecule of hemoglobin contains atoms

15,000

12,000

10,000

8,000

#10. Haemoglobin is heavier than a hydrogen atom

65,000

68,000

62,000

60,000

Finish