The reaction C6H6 + HNO3 will give _____________.
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Dilute nitric acid will oxidise HI to ____________.
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Dilute nitric acid will oxidise H2S to ____________.
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Concentrated nitric acid readily oxidises solid non metals and metalloids to their respective _____________.
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Concentrated nitric acid behaves as ______________.
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Oxoacids in which the central atom is in a higher oxidation states are termed as ____________.
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To distinguish between the oxidation states of the central atom in oxoacids, suffixes in which the central atom is in a lower oxidation state are termed ____________.
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The bond energy of N-N bond in hydrazine is very small due to _______.
A. Repulsion of the nonbonding electrons which weaken the N-N bond
B. Repulsion between N-N bond and N-H bond in hydrazine
C. Attraction and repulsion between N-N bond and N-H bond in hydrazine
D. Attractive and repulsion of the nonbonding electrons and the N-N bond in hydrazine
Answer: A
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Mineral silicates plays an important role in national economy because from it is produced _______.
A. Plastics, ceramics,paints
B. Glass, ceramics,cement
C. Cement,plastics,glass
D. Glass, paints,ceramics
Answer: B
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Which of the following statement is true ?
A. Stability of covalent hydrides of Group 4 elements decreases down the group because of decreasing M-H bond energies
B. Stability of covalent hydrides of Group 4 elements remains unchange as you move down the group
C. Stability of covalent hydrides of Group 4 elements increases down the group because of decreasing M-H bond ebergies
D. Stability of covalent hydrides of Group 4 elements increases down the group because of increasing M-H bond energies
Answer: A
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