Q11Multiple choice
On heating lead, nitrate forms oxides of nitrogen and lead. The oxides formed
are ______.
Solution;
Option (ii) is the answer.
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NCERT Exemplar · Class 12 · Chemistry
Chapter 7: The P-Block Elements
Practice each question, then open the answer or worked solution.
I. Multiple Choice Questions (Type-I)
27 questionsQ12Multiple choice
Which of the following elements does not show allotropy?
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Correct option: A
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Worked solution
Option (i) is the answer.
Q13Multiple choice
Maximum covalency of nitrogen is ______________.
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Correct option: C
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Worked solution
Option (iii) is the answer.
Q14Multiple choice
Which of the following statements is wrong?
with transition elements.
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Correct option: A
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Option (i) is the answer.
Q15Multiple choice
A brown ring is formed in the ring test for NO3
–
ion. It is due to the formation of
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Correct option: A
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Worked solution
Option (i) is the answer.
Q16Multiple choice
Elements of group-15 form compounds in +5 oxidation state. However,
bismuth forms only one well-characterised compound in +5 oxidation state.
The compound is
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Correct option: B
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Worked solution
Option (ii) is the answer.
Q17Multiple choice
On heating ammonium dichromate and barium azide separately we get
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Correct option: A
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Worked solution
Option (i) is the answer.
Q18Multiple choice
In the preparation of HNO3, we get NO gas by catalytic oxidation of ammonia.
The moles of NO produced by the oxidation of two moles of NH3
will be ______.
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Correct option: A
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Worked solution
Option (i) is the answer.
Q19Multiple choice
The oxidation state of a central atom in the anion of compound NaH2PO2 will
be ______.
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Correct option: C
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Worked solution
Option (iii) is the answer.
Q20Multiple choice
Which of the following is not tetrahedral in shape?
Option (iii) is the answer.
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Solution coming soon.