Which of the following statements is wrong?

1. Single N—N bond is stronger than a single P—P bond.

2. PH3 can act as a ligand in the formation of coordination compound with transition elements.

3. NO2 is paramagnetic in nature.

4. Covalency of nitrogen in N2O5 is four.

Subtopic:  Group 16 - Preparation, Properties & Uses | Group 15 - Preparation, Properties & Uses |
 76%
From NCERT
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The oxidation state of the central atom in the anion of the compound NaH2PO2 will be-

1. +3

2. +5

3. +1

4. -3

Subtopic:  Group 16 - Preparation, Properties & Uses |
 76%
From NCERT
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Which of the following is not tetrahedral in shape?

1.  NH4+
2.  SiCl4
3.  SF4
4.  SO42-

Subtopic:  Group 16 - Preparation, Properties & Uses |
 77%
From NCERT
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Which of the following are peroxoacids of sulphur?

1.H2SO5  and  H2S2O8
2.H2SO5  and  H2S2O7
3.H2S2O7 and  H2S2O8
4.H2S2O6 and  H2S2O7

Subtopic:  Group 16 - Preparation, Properties & Uses |
 55%
From NCERT
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Hot conc. H2SO4 acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which of the following element is oxidised by conc. H2SO4 into two gaseous products?

1.  Cu

2.  S

3.  C

4.  Zn

Subtopic:  Group 16 - Preparation, Properties & Uses |
From NCERT
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Which of the following is isoelectronic pair?

1. ICl2 , ClO2

2. BrO2- , BrF2+

3. ClO2 , BrF

4. CN- , O3

Subtopic:  Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses |
 72%
From NCERT
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Which of the following statements are correct for SO2 gas?        

a. It acts as a bleaching agent in moist conditions.

b. Its molecule has linear geometry.

c. Its dilute solution is used as a disinfectant.

d. It can be prepared by the reaction of dilute H2SO4 with metal sulphide.

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)

Subtopic:  Group 16 - Preparation, Properties & Uses |
 64%
From NCERT
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Which of the following statements are correct?

a. All the three N – O bond lengths in HNO3 are equal.
b. All P – Cl bond lengths in PCl5 molecule in the gaseous state are equal.
c. P4 molecule in white phosphorus have angular strain therefore white phosphorus is very reactive.
d. PCl5 is ionic in a solid-state in which cation is tetrahedral and the anion is octahedral.

Choose the correct option


1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Group 16 - Preparation, Properties & Uses | Group 15 - Preparation, Properties & Uses |
 82%
From NCERT
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Which of the following orders are correct as per the properties mentioned against each?
 

Column I Column II
(a) As2O3 < SiO2 < P2O3 < SO2            (i) Acid strength.
(b) AsH3 < PH3 < NH3           (ii) Enthalpy of vaporisation.
(c) S < O < Cl < F          (iii) More negative electron gain enthalpy.
(d) H2O > H2S > H2Se > H2Te              (iv) Thermal stability.

                     

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses | Group 15 - Preparation, Properties & Uses |
 68%
From NCERT
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Which of the following statements are correct?

a. S — S bond is present in H2S2O6 
b. In peroxosulphuric acid (H2SO5) sulphur is in +6 oxidation state
c. Iron powder along with Al2O3 and K2O is used as a catalyst in the preparation of NH3 by Haber's process
d. Change in enthalpy is positive for the preparation of SO3 by catalytic oxidation of SO2

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Group 16 - Preparation, Properties & Uses |
 50%
From NCERT
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