ٹھوس

Written by Dr. Ayesha Nadeem (Chemistry)

گیارہویں جماعت · کیمیا · 8 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
The smallest repeating unit of a crystal is the:
- A Molecule
- B Atom
- C Ion pair
- D Unit cell
Ice is an example of a:
- A Molecular solid
- B Metallic solid
- C Ionic solid
- D Covalent network solid
A substance that exists in more than one crystalline form is:
- A Isomeric
- B Isotopic
- C Polymorphic
- D Amorphous

جوابی کلید

1. C, 2. B, 3. C, 4. B, 5. D, 6. D, 7. A, 8. C

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.
The unit cell repeats in three dimensions.
Water molecules are held by hydrogen bonds.
For example, sulphur.