Phosphorus and Its Compounds
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CHXI11:THE P-BLOCK ELEMENTS

316817 Assertion :
White phosphorus is stored under water.
Reason :
White phosphorus is highly reactive and catches fire spontaneously in air.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI11:THE P-BLOCK ELEMENTS

316818 Consider the following statements regarding phsophorus,
I. Phosphorus exists in different allotropic forms.
II. Yellow phosphorus exists as tetrahedral molecular solid.
III. Yellow phosphorus is less reactive than red phosphorus.
IV. Black phosphorus has layer type structure.
The correct statement are

1 I, II and IV
2 I, II and III
3 II, III and IV
4 I,III and IV
CHXI11:THE P-BLOCK ELEMENTS

316819 Which of the following is least reactive?

1 Black phosphorus
2 White phosphorus
3 Yellow phosphorus
4 Red phosphorus
CHXI11:THE P-BLOCK ELEMENTS

316820 The \(\mathrm{P}-\mathrm{P}-\mathrm{P}\) bond angle in white phosphorus is

1 \(120^{\circ}\)
2 \(90^{\circ}\)
3 \({\rm{10}}{{\rm{9}}^{\rm{^\circ }}}{\rm{28'}}\)
4 \(60^{\circ}\)
CHXI11:THE P-BLOCK ELEMENTS

316821 Which one of the following properties of white phosphorus are shown by red phosphorus?

1 It dissolves in \(\mathrm{CS}_{2}\)
2 It burns when heated in air
3 It reacts with \(\mathrm{NaOH}\) to give \(\mathrm{PH}_{3}\)
4 It phosphorescences in air
NEET DIGITAL LIBRARY
CHXI11:THE P-BLOCK ELEMENTS

316817 Assertion :
White phosphorus is stored under water.
Reason :
White phosphorus is highly reactive and catches fire spontaneously in air.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI11:THE P-BLOCK ELEMENTS

316818 Consider the following statements regarding phsophorus,
I. Phosphorus exists in different allotropic forms.
II. Yellow phosphorus exists as tetrahedral molecular solid.
III. Yellow phosphorus is less reactive than red phosphorus.
IV. Black phosphorus has layer type structure.
The correct statement are

1 I, II and IV
2 I, II and III
3 II, III and IV
4 I,III and IV
CHXI11:THE P-BLOCK ELEMENTS

316819 Which of the following is least reactive?

1 Black phosphorus
2 White phosphorus
3 Yellow phosphorus
4 Red phosphorus
CHXI11:THE P-BLOCK ELEMENTS

316820 The \(\mathrm{P}-\mathrm{P}-\mathrm{P}\) bond angle in white phosphorus is

1 \(120^{\circ}\)
2 \(90^{\circ}\)
3 \({\rm{10}}{{\rm{9}}^{\rm{^\circ }}}{\rm{28'}}\)
4 \(60^{\circ}\)
CHXI11:THE P-BLOCK ELEMENTS

316821 Which one of the following properties of white phosphorus are shown by red phosphorus?

1 It dissolves in \(\mathrm{CS}_{2}\)
2 It burns when heated in air
3 It reacts with \(\mathrm{NaOH}\) to give \(\mathrm{PH}_{3}\)
4 It phosphorescences in air
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CHXI11:THE P-BLOCK ELEMENTS

316817 Assertion :
White phosphorus is stored under water.
Reason :
White phosphorus is highly reactive and catches fire spontaneously in air.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI11:THE P-BLOCK ELEMENTS

316818 Consider the following statements regarding phsophorus,
I. Phosphorus exists in different allotropic forms.
II. Yellow phosphorus exists as tetrahedral molecular solid.
III. Yellow phosphorus is less reactive than red phosphorus.
IV. Black phosphorus has layer type structure.
The correct statement are

1 I, II and IV
2 I, II and III
3 II, III and IV
4 I,III and IV
CHXI11:THE P-BLOCK ELEMENTS

316819 Which of the following is least reactive?

1 Black phosphorus
2 White phosphorus
3 Yellow phosphorus
4 Red phosphorus
CHXI11:THE P-BLOCK ELEMENTS

316820 The \(\mathrm{P}-\mathrm{P}-\mathrm{P}\) bond angle in white phosphorus is

1 \(120^{\circ}\)
2 \(90^{\circ}\)
3 \({\rm{10}}{{\rm{9}}^{\rm{^\circ }}}{\rm{28'}}\)
4 \(60^{\circ}\)
CHXI11:THE P-BLOCK ELEMENTS

316821 Which one of the following properties of white phosphorus are shown by red phosphorus?

1 It dissolves in \(\mathrm{CS}_{2}\)
2 It burns when heated in air
3 It reacts with \(\mathrm{NaOH}\) to give \(\mathrm{PH}_{3}\)
4 It phosphorescences in air
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CHXI11:THE P-BLOCK ELEMENTS

316817 Assertion :
White phosphorus is stored under water.
Reason :
White phosphorus is highly reactive and catches fire spontaneously in air.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI11:THE P-BLOCK ELEMENTS

316818 Consider the following statements regarding phsophorus,
I. Phosphorus exists in different allotropic forms.
II. Yellow phosphorus exists as tetrahedral molecular solid.
III. Yellow phosphorus is less reactive than red phosphorus.
IV. Black phosphorus has layer type structure.
The correct statement are

1 I, II and IV
2 I, II and III
3 II, III and IV
4 I,III and IV
CHXI11:THE P-BLOCK ELEMENTS

316819 Which of the following is least reactive?

1 Black phosphorus
2 White phosphorus
3 Yellow phosphorus
4 Red phosphorus
CHXI11:THE P-BLOCK ELEMENTS

316820 The \(\mathrm{P}-\mathrm{P}-\mathrm{P}\) bond angle in white phosphorus is

1 \(120^{\circ}\)
2 \(90^{\circ}\)
3 \({\rm{10}}{{\rm{9}}^{\rm{^\circ }}}{\rm{28'}}\)
4 \(60^{\circ}\)
CHXI11:THE P-BLOCK ELEMENTS

316821 Which one of the following properties of white phosphorus are shown by red phosphorus?

1 It dissolves in \(\mathrm{CS}_{2}\)
2 It burns when heated in air
3 It reacts with \(\mathrm{NaOH}\) to give \(\mathrm{PH}_{3}\)
4 It phosphorescences in air
NEET DIGITAL LIBRARY
CHXI11:THE P-BLOCK ELEMENTS

316817 Assertion :
White phosphorus is stored under water.
Reason :
White phosphorus is highly reactive and catches fire spontaneously in air.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI11:THE P-BLOCK ELEMENTS

316818 Consider the following statements regarding phsophorus,
I. Phosphorus exists in different allotropic forms.
II. Yellow phosphorus exists as tetrahedral molecular solid.
III. Yellow phosphorus is less reactive than red phosphorus.
IV. Black phosphorus has layer type structure.
The correct statement are

1 I, II and IV
2 I, II and III
3 II, III and IV
4 I,III and IV
CHXI11:THE P-BLOCK ELEMENTS

316819 Which of the following is least reactive?

1 Black phosphorus
2 White phosphorus
3 Yellow phosphorus
4 Red phosphorus
CHXI11:THE P-BLOCK ELEMENTS

316820 The \(\mathrm{P}-\mathrm{P}-\mathrm{P}\) bond angle in white phosphorus is

1 \(120^{\circ}\)
2 \(90^{\circ}\)
3 \({\rm{10}}{{\rm{9}}^{\rm{^\circ }}}{\rm{28'}}\)
4 \(60^{\circ}\)
CHXI11:THE P-BLOCK ELEMENTS

316821 Which one of the following properties of white phosphorus are shown by red phosphorus?

1 It dissolves in \(\mathrm{CS}_{2}\)
2 It burns when heated in air
3 It reacts with \(\mathrm{NaOH}\) to give \(\mathrm{PH}_{3}\)
4 It phosphorescences in air