| 1 |
Calcium has isotopes |
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| 2 |
The smallest collection of ions in an ionic compound is called. |
- A. Formula unit
- B. Chemical formula
- C. Formula mass
- D. Molecular formula
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| 3 |
Which statement is incorrect about Dempster's mass spectrometer. |
- A. Solid sample can be used in this mass spectrometer
- B. Ions are detected on the basis of mass to charge ratio
- C. Atoms or molecules are ionized with beam of electron.
- D. This spectrometer work at one atmospheric pressure.
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| 4 |
Isotopes differ in |
- A. Properties which depend upon mass
- B. Arrangement of electrons in orbital
- C. Chemical properties which depend upon weight
- D. Atomic number
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| 5 |
During combustion analysis, CO2 produced is absorbed in |
- A. Mg (CLO4)2
- B. 50% KOH
- C. CaCl2
- D. P2O5
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| 6 |
The total number of protons and neutrons present in the nucleus of an atom is called. |
- A. Mass number
- B. Atomic number
- C. Molecular mass
- D. Relative atomic mass
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| 7 |
CO+ is an example of. |
- A. Free radical
- B. Cationic molecular ion
- C. Anionic molecular ion
- D. Stable molecule
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| 8 |
The largest number of molecule are present. |
- A. 3.6 g of H2O
- B. 4.6 g of C2H5OH
- C. 2.8 g of CO
- D. 5.4 g of N2O5
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| 9 |
Which one of the following substances is used as water absorber in combustion analysis. |
- A. Mg(CIO4)2
- B. 50% KOH
- C. Lime water
- D. Dilute solution of NaOH
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| 10 |
I molar volume of a gas at S.T.P is occupied by |
- A. 1 g of gas
- B. 6 x 10<sup>23</sup>g of gas
- C. 22.4 m<sup>3</sup>of gas
- D. 1 gram molecular mass of gas
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