11. THE P-BLOCK ELEMENTS
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11. THE P-BLOCK ELEMENTS

189697 \(Pb{O_2}\) is

1 Basic
2 Acidic
3 Neutral
4 Amphoteric
11. THE P-BLOCK ELEMENTS

189698 Lead pipes are not suitable for drinking water because

1 A layer of lead dioxide is deposited over pipes
2 Lead reacts with air to form litharge
3 Lead reacts with water containing air to form \(Pb{(OH)_2}\)
4 Lead forms basic lead carbonate
11. THE P-BLOCK ELEMENTS

189699 Silicon dioxide is formed by the reaction of

1 \(SiC{l_4} + 2{H_2}O\)
2 \({N_2}\)
3 \(Si{O_2} + NaOH\)
4 \(SiC{l_4} + NaOH\)
11. THE P-BLOCK ELEMENTS

189700 Which alkali metal carbonate decomposes on heating to liberate \(C{O_2}\) gas

1 \(L{i_2}C{O_3}\)
2 \(CaC{O_3}\)
3 \(N{a_2}C{O_3}\)
4 \(A{l_2}C{O_3}\)
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11. THE P-BLOCK ELEMENTS

189697 \(Pb{O_2}\) is

1 Basic
2 Acidic
3 Neutral
4 Amphoteric
11. THE P-BLOCK ELEMENTS

189698 Lead pipes are not suitable for drinking water because

1 A layer of lead dioxide is deposited over pipes
2 Lead reacts with air to form litharge
3 Lead reacts with water containing air to form \(Pb{(OH)_2}\)
4 Lead forms basic lead carbonate
11. THE P-BLOCK ELEMENTS

189699 Silicon dioxide is formed by the reaction of

1 \(SiC{l_4} + 2{H_2}O\)
2 \({N_2}\)
3 \(Si{O_2} + NaOH\)
4 \(SiC{l_4} + NaOH\)
11. THE P-BLOCK ELEMENTS

189700 Which alkali metal carbonate decomposes on heating to liberate \(C{O_2}\) gas

1 \(L{i_2}C{O_3}\)
2 \(CaC{O_3}\)
3 \(N{a_2}C{O_3}\)
4 \(A{l_2}C{O_3}\)
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11. THE P-BLOCK ELEMENTS

189697 \(Pb{O_2}\) is

1 Basic
2 Acidic
3 Neutral
4 Amphoteric
11. THE P-BLOCK ELEMENTS

189698 Lead pipes are not suitable for drinking water because

1 A layer of lead dioxide is deposited over pipes
2 Lead reacts with air to form litharge
3 Lead reacts with water containing air to form \(Pb{(OH)_2}\)
4 Lead forms basic lead carbonate
11. THE P-BLOCK ELEMENTS

189699 Silicon dioxide is formed by the reaction of

1 \(SiC{l_4} + 2{H_2}O\)
2 \({N_2}\)
3 \(Si{O_2} + NaOH\)
4 \(SiC{l_4} + NaOH\)
11. THE P-BLOCK ELEMENTS

189700 Which alkali metal carbonate decomposes on heating to liberate \(C{O_2}\) gas

1 \(L{i_2}C{O_3}\)
2 \(CaC{O_3}\)
3 \(N{a_2}C{O_3}\)
4 \(A{l_2}C{O_3}\)
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11. THE P-BLOCK ELEMENTS

189697 \(Pb{O_2}\) is

1 Basic
2 Acidic
3 Neutral
4 Amphoteric
11. THE P-BLOCK ELEMENTS

189698 Lead pipes are not suitable for drinking water because

1 A layer of lead dioxide is deposited over pipes
2 Lead reacts with air to form litharge
3 Lead reacts with water containing air to form \(Pb{(OH)_2}\)
4 Lead forms basic lead carbonate
11. THE P-BLOCK ELEMENTS

189699 Silicon dioxide is formed by the reaction of

1 \(SiC{l_4} + 2{H_2}O\)
2 \({N_2}\)
3 \(Si{O_2} + NaOH\)
4 \(SiC{l_4} + NaOH\)
11. THE P-BLOCK ELEMENTS

189700 Which alkali metal carbonate decomposes on heating to liberate \(C{O_2}\) gas

1 \(L{i_2}C{O_3}\)
2 \(CaC{O_3}\)
3 \(N{a_2}C{O_3}\)
4 \(A{l_2}C{O_3}\)
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