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گیارہویں جماعت · کیمیا · 5 سوالات

نام: ____________________ تاریخ: ____________

A solid with a regular repeating arrangement is:
- A A gas
- B A colloid
- C Crystalline
- D Amorphous
Glass is an example of an:
- A Molecular crystal
- B Amorphous solid
- C Ionic crystal
- D Metallic crystal
Diamond and graphite are:
- A Isotopes
- B Isomers
- C Allotropes of carbon
- D Compounds
Metals conduct electricity because of:
- A Covalent bonds
- B Free electrons
- C Ions in a lattice only
- D Hydrogen bonds
Sodium chloride has a:
- A Metallic structure
- B Simple molecular structure
- C Network covalent structure
- D Face centred cubic arrangement of ions

جوابی کلید

1. C, 2. B, 3. C, 4. B, 5. D

Crystalline solids have long range order.
Glass has no long range order.
They are different forms of the same element, carbon.
A sea of delocalised electrons carries current.
It has an ionic lattice, with each ion surrounded by six of the opposite charge.