Oxidation Number
CHXI08:REDOX REACTIONS

315210 Oxidation state of ' S ' in S8 molecule is

1 0
2 +2
3 +4
4 +6
CHXI08:REDOX REACTIONS

315139 Consider the following equation, which represents a reaction in the extraction of chromium from its ore
2Fe2O3Cr2O3+4Na2CO3+3O22Fe2O3+
4Na2CrO4+4CO2
Which one of the following statements about the oxidation states of the substances is correct?

1 The iron has been reduced from +3 to +2 state.
2 The chromium has been oxidised from +3 to +6 state.
3 The carbon has been oxidised from +2 to +4 state.
4 There is no change in the oxidation state of the substances in the reaction.
CHXI08:REDOX REACTIONS

315140 In which of the following reactions, the underlined element has decreased its oxidation number during the reaction?

1 Fe+CuSO4Cu+FeSO4
2 H2+Cl22HCl
3 C+H2OCO+H2
4 MnO2+4HClMnCl2+Cl2+2H2O
CHXI08:REDOX REACTIONS

315142 Assertion :
Oxidation state of nitrogen in N3H is 1/3.
Reason :
Nitrogen is less electronegative than hydrogen.

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.
CHXI08:REDOX REACTIONS

315210 Oxidation state of ' S ' in S8 molecule is

1 0
2 +2
3 +4
4 +6
CHXI08:REDOX REACTIONS

315139 Consider the following equation, which represents a reaction in the extraction of chromium from its ore
2Fe2O3Cr2O3+4Na2CO3+3O22Fe2O3+
4Na2CrO4+4CO2
Which one of the following statements about the oxidation states of the substances is correct?

1 The iron has been reduced from +3 to +2 state.
2 The chromium has been oxidised from +3 to +6 state.
3 The carbon has been oxidised from +2 to +4 state.
4 There is no change in the oxidation state of the substances in the reaction.
CHXI08:REDOX REACTIONS

315140 In which of the following reactions, the underlined element has decreased its oxidation number during the reaction?

1 Fe+CuSO4Cu+FeSO4
2 H2+Cl22HCl
3 C+H2OCO+H2
4 MnO2+4HClMnCl2+Cl2+2H2O
CHXI08:REDOX REACTIONS

315141 Which of the following oxidation state is the most common among the lanthanides?

1 4
2 2
3 5
4 3
CHXI08:REDOX REACTIONS

315142 Assertion :
Oxidation state of nitrogen in N3H is 1/3.
Reason :
Nitrogen is less electronegative than hydrogen.

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.
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXI08:REDOX REACTIONS

315210 Oxidation state of ' S ' in S8 molecule is

1 0
2 +2
3 +4
4 +6
CHXI08:REDOX REACTIONS

315139 Consider the following equation, which represents a reaction in the extraction of chromium from its ore
2Fe2O3Cr2O3+4Na2CO3+3O22Fe2O3+
4Na2CrO4+4CO2
Which one of the following statements about the oxidation states of the substances is correct?

1 The iron has been reduced from +3 to +2 state.
2 The chromium has been oxidised from +3 to +6 state.
3 The carbon has been oxidised from +2 to +4 state.
4 There is no change in the oxidation state of the substances in the reaction.
CHXI08:REDOX REACTIONS

315140 In which of the following reactions, the underlined element has decreased its oxidation number during the reaction?

1 Fe+CuSO4Cu+FeSO4
2 H2+Cl22HCl
3 C+H2OCO+H2
4 MnO2+4HClMnCl2+Cl2+2H2O
CHXI08:REDOX REACTIONS

315141 Which of the following oxidation state is the most common among the lanthanides?

1 4
2 2
3 5
4 3
CHXI08:REDOX REACTIONS

315142 Assertion :
Oxidation state of nitrogen in N3H is 1/3.
Reason :
Nitrogen is less electronegative than hydrogen.

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.
CHXI08:REDOX REACTIONS

315210 Oxidation state of ' S ' in S8 molecule is

1 0
2 +2
3 +4
4 +6
CHXI08:REDOX REACTIONS

315139 Consider the following equation, which represents a reaction in the extraction of chromium from its ore
2Fe2O3Cr2O3+4Na2CO3+3O22Fe2O3+
4Na2CrO4+4CO2
Which one of the following statements about the oxidation states of the substances is correct?

1 The iron has been reduced from +3 to +2 state.
2 The chromium has been oxidised from +3 to +6 state.
3 The carbon has been oxidised from +2 to +4 state.
4 There is no change in the oxidation state of the substances in the reaction.
CHXI08:REDOX REACTIONS

315140 In which of the following reactions, the underlined element has decreased its oxidation number during the reaction?

1 Fe+CuSO4Cu+FeSO4
2 H2+Cl22HCl
3 C+H2OCO+H2
4 MnO2+4HClMnCl2+Cl2+2H2O
CHXI08:REDOX REACTIONS

315141 Which of the following oxidation state is the most common among the lanthanides?

1 4
2 2
3 5
4 3
CHXI08:REDOX REACTIONS

315142 Assertion :
Oxidation state of nitrogen in N3H is 1/3.
Reason :
Nitrogen is less electronegative than hydrogen.

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.
CHXI08:REDOX REACTIONS

315210 Oxidation state of ' S ' in S8 molecule is

1 0
2 +2
3 +4
4 +6
CHXI08:REDOX REACTIONS

315139 Consider the following equation, which represents a reaction in the extraction of chromium from its ore
2Fe2O3Cr2O3+4Na2CO3+3O22Fe2O3+
4Na2CrO4+4CO2
Which one of the following statements about the oxidation states of the substances is correct?

1 The iron has been reduced from +3 to +2 state.
2 The chromium has been oxidised from +3 to +6 state.
3 The carbon has been oxidised from +2 to +4 state.
4 There is no change in the oxidation state of the substances in the reaction.
CHXI08:REDOX REACTIONS

315140 In which of the following reactions, the underlined element has decreased its oxidation number during the reaction?

1 Fe+CuSO4Cu+FeSO4
2 H2+Cl22HCl
3 C+H2OCO+H2
4 MnO2+4HClMnCl2+Cl2+2H2O
CHXI08:REDOX REACTIONS

315141 Which of the following oxidation state is the most common among the lanthanides?

1 4
2 2
3 5
4 3
CHXI08:REDOX REACTIONS

315142 Assertion :
Oxidation state of nitrogen in N3H is 1/3.
Reason :
Nitrogen is less electronegative than hydrogen.

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.