Everyday Science MCQs

5120 MCQs  (Page 335 of 512)

When water freezes at 0°C its density decreases due to_______________?
A. Change of bond angles
B. Cubic structure of ice
C. Empty space present in the structure of ice
D. Change of bond length
The boiling point increases down the zero group element due to_________________?
A. Ion dipole forces
B. London forces
C. Hydrogen bonding
D. Dipole dipole forces
Isomorphic substances have _______________?
A. Same physical and chemical properties
B. Same physical and different chemical properties
C. Different physical and same chemical properties
D. Different physical and chemical properties
The pressure during the molar heat of fusion is kept________________?
A. 0 atmosphere
B. One atmosphere
C. 2 atmosphere
D. 10 atmosphere
All the enthalpy changes are________________?
A. Negative
B. Positive
C. May or may not be a or b
D. None
Which has strongest bonding in the solid state ?
A. Hydrogen chloride (hci)
B. Chlorine (cl2)
C. Xenon(xe)
D. Sodium chloride (naci)
Table salt crystallizes with a______________________?
A. Face centered cubic lattice
B. Body centered cubic lattice
C. Simple cubic lattice
D. Othorhombic lattice