Chapter-4 - 11th - Liquids and Solids Preparation Multiple Questions and Answers.




6.When water freezes at 0°C, its density decreases due to
A. Cubic structure of ice
B. Empty spaces present in the structure of ice
C. Change of bond lengths
D. Change of bond angles

7.Existence of an element in more than one crystalline form is known as.
A. Anisotropy
B. Allotropy
C. Isomorphism
D. Unit cell

8.The polarizabilities of elements mostly increase down the group due to the reason that
A. The atomic numbers increase
B. Number of protons increase
C. Number of shells increase along, with increase of shielding effect
D. The behavior of the elements remain the same

9.Polymorphic substances have
A. Same physical and chemical properties
B. Different physical and chemical properties.
C. Same physical but different chemical properties
D. Different physical and same chemical properties.

10.Which of the following can form H-bonds
A. NH3
B. C2H6
C. NaCI
D. CHCI3

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