Introduction to Carbon Family

Q.

What is the purest form of carbon?

Fullerene or diamond?

Q.

Is Chlorine a metal or a non-metal?

Q.

Name the liquid elements in the Periodic Table.

Q.

Which is better silicon or germanium?

Q.

Is sulfur a metal, metalloid, or nonmetal? What is its family name?

Q. Which one of the following chemical agent is not being used for dry–cleaning of clothes?

1. $H_2{O}_2$
2. $CC{l}_4$
3. Liquid $C{O}_2$
4. $C{l}_{2}C=CC{l}_2$

Q. The correct electronic configuration for $E{u}^{2+}$ is

1. $\left[Xe\right]4f^6$
2. $\left[Xe\right]4f^7$
3. $\left[Xe\right]4f^5$
4. $\left[Xe\right]4f^{7}5d^1$

Q. Why is $P{b}^{4+}$ less stable than $P{b}^{2+}$ ?

1. Due to poor shieding of $6s^2$electron by inner d and f electron
2. Due to poor shieding of $6p^2$electron by inner s and f electron
3. Due to poor shieding of $6f^{14}$electron by inner electron
4. Due to poor shieding of $5d^{10}$electron by inner f electron

Q.

Write the name of a liquid metal?

Q. Which one of the following elements is/are non-metal?

1. C
2. Ge
3. Sn
4. Si

Q.

According to the periodic table, how many elements are metalloids?

Q.

Which of the following is NOT true for solid crystals?

1. Solid crystals have fixed positions of the constituent particles.

2. Solid crystals have large intermolecular distances.

3. Solid crystals have definite mass and volume.

4. Solid crystals have strong intermolecular forces.

Q.

Metals are generally solid. Which of the following metals is in the liquid state at room temperature?

1. Mercury

2. Silver

3. Aluminum

4. Sodium

Q.

Does ${\mathrm{CO}}_2$ has delocalized pi bonds?

Q.

Why some of the physical properties of solids show different values when measured along different directions in the same crystals?

1. Because solid crystals are isotropic.

2. Because solid crystals have short bond distances.

3. Because solid crystals are rigid.

4. Because solid crystals are anisotropic.

Q. In the formula of brown ring complex $\left[Fe{\left(H_{2}O\right)}_5\left(NO\right)\right]S{O}_4$, the magnetic moment is 3.87 B.M. The oxidation state of Fe and number of unpaired electrons present respectively are :

1. $1+,3$
2. $2+,3$
3. $3+,3$
4. $3+,5$

Q. Which of the following is the radioactive isotope of carbon?

1. ${}^{12}C$
2. ${}^{13}C$
3. ${}^{14}C$
4. None of the above

Q. 27.The specific conductance of 0.5 N solution of 0.01287 ohm*-1 cm *-1 . What would be the equivalent conductance

Q. Which of the following species contains equal number of $\sigma$ and $\pi$ bonds?

1. $Xe{O}_4$
2. $(CN{)}_2$
3. $C{H}_2(CN{)}_2$
4. $HC{O}_3^{-}$

Q. Crystalline solids may be anisotropic due to the arrangement of their constituent particles but how are amorphous solids isotropic in nature?

Q.

Match list-I and list-II

Column 1	Column 2
Kernite	Tin
Cassiterite	Boron
Calamine	Fluorine
Cryolite	Zinc

Q.

Which of the following is incorrect for group 14 elements?

1. The stability of dihalides are in the order CX2<SiX2<GeX2<SnX2<PbX2

2. The ability to form p-p multiple bonds among themselves increases down the group

3. The tendency for catenation decreases down the group

4. They all form oxides with the formula

Q.

Name the inert gas that has compounds that are known for the maximum number of compounds.

Q. $\begin{array}{cc}\text{Column - I}& \text{Column - II}\\ \text{(Type of solid)}& \text{(Properties)}\\ \text{(i) Ionic solids}& \text{(A) Giant molecules}\\ \text{(ii) Network solids}& \text{(B) Volatile liquids or}\\ & \text{soft solid at room}\\ & \text{temperature}\\ \text{(iii) Metallic solids}& \text{(C) No free ion to move}\\ & \text{in solid state}\\ \text{(iv) Hydrogen bonded}& \text{(D) Positive ion}\\ \text{molecular solid}& \text{surrounded by sea}\\ & \text{of electrons}\end{array}$
Which of the following is the best matched option?

1. i-A, ii- D, iii- C, iv-B
2. i-C, ii- A, iii- D, iv-B
3. i-D, ii- D, iii- A, iv-B
4. i-C, ii- B, iii- D, iv-A

Q.

Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?

1. Na

2. Fe

3. Cr

4. Hg

Q. To prepare $Xe{F}_6$ at 573 K, 60-70 atm pressure, the ratio of xenon and fluorine used is :

1. 1 : 2
2. 1 : 5
3. 1 : 20
4. 10 : 1

Q. Assertion : Potassium ferricyanide, ${\left[Fe{\left(CN\right)}_6\right]}^{3-}$ is diamagnetic , while potassium ferrocyanide ${\left[Fe{\left(CN\right)}_6\right]}^{4-}$ is paramagnetic.

Reason : Oxidation state of Fe in potassium fericyanide is +2 , but in potassium ferrocyanide its oxidation state is +3.

1. If both assertion and reason are true and reason is correct explanation of assertion.
2. If both assertion and reason are false.
3. If both assertion and reason are true and reason is not correct explanation of assertion.
4. If assertion is true but reason is false.

Q. Which among the following is a stable isotope of C?
1. ${}^{12}C$ 2. ${}^{13}C$ 3. ${}^{14}C$

1. Only 1 and 2
2. 1, 2, 3
3. only 2 and 3
4. Only 3

Q.

Sodium chloride is crystalline in nature because its molecules have a definite crucial shape.

1. True
2. False

Q.

Amorphous solids

1. do not have sharp melting points

2. have same mechanical strength, electrical and optical properties in all directions.

3. are isotropic

4. All the facts given in (A), (B) and (C) are correct about them