NEET Test Series from KOTA - 10 Papers In MS WORD
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11. THE P-BLOCK ELEMENTS
189701
Which of the following gives propyne on hydrolysis
1 \(A{l_4}{C_3}\)
2 \(M{g_2}{C_3}\)
3 \({B_4}C\)
4 \(L{a_4}{C_3}\)
Explanation:
(b) Propyne can be prepared by the hydrolysis of magnesium carbide. \(Mg_2C_3\) + \(4H_2O\) \(\to\) \(CH_3C\) \( \equiv \) \(CH\) + \(2Mg(OH)_2\)
11. THE P-BLOCK ELEMENTS
189702
Which one of the following statements is not correct
1 Zinc dissolves in sodium hydroxide solution
2 Carbon monoxide reduces iron \((III)\) oxide to iron
3 Mercury \((II)\) iodide dissolves in excess of potassium iodide solution
4 Tin \((IV)\) chloride is made by dissolving tin solution in concentrated hydrochloric acid
Explanation:
Zinc dissolves in sodium hydroxide solution due to formation of \(Zn + NaOH \rightarrow Na _2 ZnO _2 \text {. }\) Mercury \((II)\)iodide dissolves in excess of potassium iodide solution due to formation of \(HgI _2+2 KI \rightarrow K _2 HgI _4\) Tin \((IV)\) chloride is made by \(Sn +2 Cl _2 \rightarrow SnCl _4\)
11. THE P-BLOCK ELEMENTS
189703
In laboratory silicon can be prepared by the reaction
1 By heating carbon in electric furnace
2 By heating potassium with potassium dichromate
3 Silica with magnesium
4 None of these
Explanation:
In laboratory, Silicon is prepared by the reaction of Silica with Magnesium. Reaction: \(SiO _2+2 Mg \rightarrow Si +2 MgO\)
11. THE P-BLOCK ELEMENTS
189704
Which of the following is the correct statement for red lead
1 It is an active form of lead
2 Its molecular formula is \(P{b_2}{O_3}\)
3 It decomposes into \(Pb\) and \(C{O_2}\)
4 It decomposes into \(PbO\) and \({O_2}\)
Explanation:
(d) Generally red lead decompose into \(PbO\) and \({O_2}\).
189701
Which of the following gives propyne on hydrolysis
1 \(A{l_4}{C_3}\)
2 \(M{g_2}{C_3}\)
3 \({B_4}C\)
4 \(L{a_4}{C_3}\)
Explanation:
(b) Propyne can be prepared by the hydrolysis of magnesium carbide. \(Mg_2C_3\) + \(4H_2O\) \(\to\) \(CH_3C\) \( \equiv \) \(CH\) + \(2Mg(OH)_2\)
11. THE P-BLOCK ELEMENTS
189702
Which one of the following statements is not correct
1 Zinc dissolves in sodium hydroxide solution
2 Carbon monoxide reduces iron \((III)\) oxide to iron
3 Mercury \((II)\) iodide dissolves in excess of potassium iodide solution
4 Tin \((IV)\) chloride is made by dissolving tin solution in concentrated hydrochloric acid
Explanation:
Zinc dissolves in sodium hydroxide solution due to formation of \(Zn + NaOH \rightarrow Na _2 ZnO _2 \text {. }\) Mercury \((II)\)iodide dissolves in excess of potassium iodide solution due to formation of \(HgI _2+2 KI \rightarrow K _2 HgI _4\) Tin \((IV)\) chloride is made by \(Sn +2 Cl _2 \rightarrow SnCl _4\)
11. THE P-BLOCK ELEMENTS
189703
In laboratory silicon can be prepared by the reaction
1 By heating carbon in electric furnace
2 By heating potassium with potassium dichromate
3 Silica with magnesium
4 None of these
Explanation:
In laboratory, Silicon is prepared by the reaction of Silica with Magnesium. Reaction: \(SiO _2+2 Mg \rightarrow Si +2 MgO\)
11. THE P-BLOCK ELEMENTS
189704
Which of the following is the correct statement for red lead
1 It is an active form of lead
2 Its molecular formula is \(P{b_2}{O_3}\)
3 It decomposes into \(Pb\) and \(C{O_2}\)
4 It decomposes into \(PbO\) and \({O_2}\)
Explanation:
(d) Generally red lead decompose into \(PbO\) and \({O_2}\).
189701
Which of the following gives propyne on hydrolysis
1 \(A{l_4}{C_3}\)
2 \(M{g_2}{C_3}\)
3 \({B_4}C\)
4 \(L{a_4}{C_3}\)
Explanation:
(b) Propyne can be prepared by the hydrolysis of magnesium carbide. \(Mg_2C_3\) + \(4H_2O\) \(\to\) \(CH_3C\) \( \equiv \) \(CH\) + \(2Mg(OH)_2\)
11. THE P-BLOCK ELEMENTS
189702
Which one of the following statements is not correct
1 Zinc dissolves in sodium hydroxide solution
2 Carbon monoxide reduces iron \((III)\) oxide to iron
3 Mercury \((II)\) iodide dissolves in excess of potassium iodide solution
4 Tin \((IV)\) chloride is made by dissolving tin solution in concentrated hydrochloric acid
Explanation:
Zinc dissolves in sodium hydroxide solution due to formation of \(Zn + NaOH \rightarrow Na _2 ZnO _2 \text {. }\) Mercury \((II)\)iodide dissolves in excess of potassium iodide solution due to formation of \(HgI _2+2 KI \rightarrow K _2 HgI _4\) Tin \((IV)\) chloride is made by \(Sn +2 Cl _2 \rightarrow SnCl _4\)
11. THE P-BLOCK ELEMENTS
189703
In laboratory silicon can be prepared by the reaction
1 By heating carbon in electric furnace
2 By heating potassium with potassium dichromate
3 Silica with magnesium
4 None of these
Explanation:
In laboratory, Silicon is prepared by the reaction of Silica with Magnesium. Reaction: \(SiO _2+2 Mg \rightarrow Si +2 MgO\)
11. THE P-BLOCK ELEMENTS
189704
Which of the following is the correct statement for red lead
1 It is an active form of lead
2 Its molecular formula is \(P{b_2}{O_3}\)
3 It decomposes into \(Pb\) and \(C{O_2}\)
4 It decomposes into \(PbO\) and \({O_2}\)
Explanation:
(d) Generally red lead decompose into \(PbO\) and \({O_2}\).
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
11. THE P-BLOCK ELEMENTS
189701
Which of the following gives propyne on hydrolysis
1 \(A{l_4}{C_3}\)
2 \(M{g_2}{C_3}\)
3 \({B_4}C\)
4 \(L{a_4}{C_3}\)
Explanation:
(b) Propyne can be prepared by the hydrolysis of magnesium carbide. \(Mg_2C_3\) + \(4H_2O\) \(\to\) \(CH_3C\) \( \equiv \) \(CH\) + \(2Mg(OH)_2\)
11. THE P-BLOCK ELEMENTS
189702
Which one of the following statements is not correct
1 Zinc dissolves in sodium hydroxide solution
2 Carbon monoxide reduces iron \((III)\) oxide to iron
3 Mercury \((II)\) iodide dissolves in excess of potassium iodide solution
4 Tin \((IV)\) chloride is made by dissolving tin solution in concentrated hydrochloric acid
Explanation:
Zinc dissolves in sodium hydroxide solution due to formation of \(Zn + NaOH \rightarrow Na _2 ZnO _2 \text {. }\) Mercury \((II)\)iodide dissolves in excess of potassium iodide solution due to formation of \(HgI _2+2 KI \rightarrow K _2 HgI _4\) Tin \((IV)\) chloride is made by \(Sn +2 Cl _2 \rightarrow SnCl _4\)
11. THE P-BLOCK ELEMENTS
189703
In laboratory silicon can be prepared by the reaction
1 By heating carbon in electric furnace
2 By heating potassium with potassium dichromate
3 Silica with magnesium
4 None of these
Explanation:
In laboratory, Silicon is prepared by the reaction of Silica with Magnesium. Reaction: \(SiO _2+2 Mg \rightarrow Si +2 MgO\)
11. THE P-BLOCK ELEMENTS
189704
Which of the following is the correct statement for red lead
1 It is an active form of lead
2 Its molecular formula is \(P{b_2}{O_3}\)
3 It decomposes into \(Pb\) and \(C{O_2}\)
4 It decomposes into \(PbO\) and \({O_2}\)
Explanation:
(d) Generally red lead decompose into \(PbO\) and \({O_2}\).