Amorphous Forms of Carbon

Q. Dangling bonds are not present in .

1. diamond
2. graphite
3. fullerenes

Q.

Which one is called pseudo solid?

1. $Ca{F}_2$
2. Glass
3. $NaCl$
4. All of these

Q. Which of the following is not a characteristic of crystalline solids?

1. They have a regular geometry.
2. They have sharp melting points.
3. They are isotropic.
4. They undergo a clean cleavage

Q.

Why $\mathrm{LiCl}$ is more covalent than $\mathrm{KCl}$?

Q. Which of the following is true regarding amorphous solids?

1. posses sharp melting points
2. undergo clean cleavage when cut with knife
3. do not undergo clean cleavage when cut with a knife
4. posses orderly arrangement over long distances

Q. Choose the correct option.
Crystalline solids do not have/show:

1. a definite latent heat of fusion.
2. regular atomic arrangement
3. polymorphism
4. free movement of atoms or ions

Q.

Which of the following compound does have chiral carbon atom?

1. CH₃CH₂CH₂CH (Br)CH₃

2. CH₃CH₂CH(Br) CH₂CH₃

3. (CH₃)₂CHCH₂CH₂Br

4. CH₃CH₂CH₂ CH₂Br

Q. According to Fajan's rule, ionic character increases for:

1. Large cation and small anion
2. Small cation and small charge on cation
3. Small cation and large charge on cation
4. Large cation and no charge on cation

Q. Which of the following statement is correct regarding amorphous solids?

1. Amorphous solids are anisotropy
2. They have sharp melting point.
3. $SiC$ is an example of amorphous solid
4. None of the above

Q. Which of the following statement(s) is/are correct regarding amorphous solids:

1. Do not have sharp melting points
2. Are isotropic
3. Have same mechanical strength, electrical and optical properties in all directions
4. Lack of long range order

Q. Why carbon is so versatile in nature?

Q. At what temperature, zinc and carbon have equal affinity for oxygen?

1. ${1000}^{\circ }C$
2. ${1500}^{\circ }C$
3. ${500}^{\circ }C$
4. ${1200}^{\circ }C$

Q. Which of the following is/are amorphous solid(s)?

1. $SiC$
2. $Ca{F}_2$
3. Glass
4. Plastic

Q. Iodine molecules are held in the crystals lattice by __________.

1. london forces
2. covalent bonds
3. coulombic forces
4. dipole-dipole interactions

Q. Choose the correct option(s)
Crystalline solids do not have/show:

1. a definite latent heat of fusion.
2. irregular atomic arrangement
3. polymorphism
4. free movement of atoms or ions

Q. Amorphous solids:

1. do not have a definite geometrical shape.
2. are called supercooled liquids or pseudo solid
3. are isotropic
4. All of the above.

Q. Which of the following is amorphous solid?

1. Glass
2. $Ca{F}_2$
3. $SiC$
4. None of the above

Q.

No element exists with the chemical symbol Er.

1. True
2. False

Q.

Which of the following is a liquid non-metal?

1. chlorine

2. fluorine

3. bromine

4. iodine

Q.

The statement given below is incorrect. Write the correct statement.

The properties of a mixture are entirely different from the properties of its constituents.

Q.

Name the naturally occurring form of amorphous Carbon and briefly explain how it was formed.

Q. Which shows maximum catenation property?

1. Te
2. C
3. Se
4. O

Q. Assertion :Due to catenation a large number of carbon compounds are formed. Reason: Carbon compounds show the property of allotropy.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. There is no S-S bond in:

1. $S_2{O}_4^{2-}$
2. $S_2{O}_3^{-2}$
3. $S_2{O}_5^{2-}$
4. $S_2{O}_7^{-2}$

Q. Which is an example of amorphous carbon?

1. Charcoal
2. Coke
3. Lamp black
4. All of the above

Q. Which compounds of carbon are also studied in inorganic chemistry?

1. $C{O}_2$
2. $H_{2}C{O}_3$
3. $Ca{C}_2$
4. $(COOH{)}_2$

Q. Dangling bonds are not present in .

1. diamond
2. graphite
3. fullerenes

Q. Can you explain the importance of catenation in carbon?

Q. What is the unique ability of carbon atom?

Q.

C-C bond length is maximum in

1. acetylene

2. naphthalene

3. graphite

4. diamond