Allotropes of Phosphorus

Q.

Which allotropic form of phosphorus is the most reactive?

Q. Pure white phosphorus is obtained by heating phosphate rocks with Silica and Coke in an electric furnace - True or False?

1. True
2. False

Q. Which of the following options is incorrect about white phosphorous?

1. It has tetrahedral structure
2. Four P-P single bonds are present
3. Four lone pairs of electrons are present
4. PPP angle is ${60}^{\circ }$

Q.

Which of the following phosphorus allotropes is thermodynamically the most stable?

1. Red phosphorus

2. White phosphorus

3. Black phosphorus

4. None of the above

Q. Which of the following options is incorrect about white phosphorous?

1. It has tetrahedral structure
2. Four P-P single bonds are present
3. Four lone pairs of electrons are present
4. PPP angle is ${60}^{\circ }$

Q. In $P_4$ molecule phosphorus atoms are tetrahedrally arranged. The bond angle P-P-P in the molecule is

1. ${108}^{\circ }$
2. ${120}^{\circ }$
3. ${60}^{\circ }$
4. ${180}^{\circ }$

Q.

$P_4$ (white phosphorus) when treated with thionyl chloride produces phosphorus ___. On the other hand if $P_4$ (white phosphorus) is treated with sulphuryl chloride we get phosphorus ___.

Q.

Explain the comparison of the reactivity of allotropes of phosphorus?

Q.

A person working with white phosphorus suffers from a disease in which bones decay. It is known as:

1. Arthritis

2. Rickets

3. Beriberi

4. Phossy jaw

Q. The P-P-P bond angle in the tetra-atomic $P_4$ molecule is 107 degrees - True or False?

1. True
2. False

Q. White phosphorous is insoluble in water but readily soluble in carbon disulphide.

1. True
2. False

Q. Given below are four statements regarding the allotropes of Phosphorus. Which of them is/are incorrect?

1. White Phosphorus is a waxy, molecular solid that has a garlic-like odour
2. Red Phosphorus is more reactive than white phosphorus and it is soluble in carbon disulphide
3. Red Phosphorus can be cut with a knife
4. Red Phosphorus is a non-toxic, odourless polymeric solid at room temperature

Q. Red phosphorus reacts with caustic alkalies.

1. True
2. False