| 1 |
One of the following liquids has lowest vapour pressure at 32°C. Indicate that liquid |
- A. Ether
- B. Chloroform
- C. Ethanol
- D. Water
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| 2 |
London dispersion forces are the only forces present among the |
- A. Molecules of water in liquid state
- B. Atoms of helium in gaseous state at high temperature
- C. Molecules of solid iodine
- D. Molecules of hydrogen chloride gas
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| 3 |
Existence of an element in more than one crystalline form is known as. |
- A. Anisotropy
- B. Allotropy
- C. Isomorphism
- D. Unit cell
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| 4 |
Acetone and chloroform are soluble in each other due to. |
- A. Intermolecular hydrogen bonding
- B. Dipole dipole interaction
- C. Instantaneous dipoles
- D. All of the above
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| 5 |
The long chains of amino acids are coiled about one another onto a spiral by |
- A. Ionic bond
- B. Van der walls forces
- C. Hydrogen bonding
- D. Overlapping of orbitals
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| 6 |
In triclinic unit cell |
- A. All axial lengths are equal
- B. All internals lengths and angles are equal
- C. Both axial lengths and angles are equal
- D. Both axial lengths and angles are unequal
|
| 7 |
Long chains of amino acids are coiled about one another into a spiral by |
- A. Covalent bond
- B. Ionic bond
- C. Hydrogen bond
- D. Van Der Waal's forces
|
| 8 |
On which factor boiling point of a liquid depends. |
- A. Amount of the liquid
- B. Shape of the container of the liquid
- C. Type of burner used for boiling
- D. External pressure
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| 9 |
Which of the given has hydrogen bonding. |
- A. CH4
- B. CCl4
- C. NH3
- D. NaCl
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| 10 |
NH3 shows a maximum boiling point among the hydrides of the group V elements due to. |
- A. Very small size of nitrogen
- B. Long pair of electrons present on nitrogen
- C. Enhanced electronegative character of nitrogen
- D. Pyramidal structure of NH3
|