316154
Which one of the following statements is wrong?
1 Ionic carbides are formed by highly electropositive metals
2 Carborundum and boron carbide are true covalent carbide
3 Carborundum and boron carbide are used as abrasive
4 \(\mathrm{Mg}_{2} \mathrm{C}_{3}\) like \(\mathrm{CaC}_{2}\) on hydrolysis evolves \(\mathrm{C}_{2} \mathrm{H}_{2}\)
Explanation:
\(\mathrm{Mg}_{2} \mathrm{C}_{3}\) gives propyne.
CHXI11:THE P-BLOCK ELEMENTS
316155
Which of the following is methanide?
1 \(\mathrm{Be}_{2} \mathrm{C}\)
2 \(\mathrm{CaC}_{2}\)
3 \(\mathrm{Mn}_{3} \mathrm{C}\)
4 \(\mathrm{Mg}_{3} \mathrm{C}_{2}\)
Explanation:
\({\rm{B}}{{\rm{e}}_{\rm{2}}}{\rm{C}}\) has \({{\rm{C}}^{{\rm{4 - }}}}\) ion and on hydrolysis gives \(\mathrm{CH}_{4}\).
CHXI11:THE P-BLOCK ELEMENTS
316156
How many moles of methane are obtained by the hydrolysis of one mole of aluminium carbide?
1 5
2 6
3 3
4 7
Explanation:
\({\mathrm{\mathrm{Al}_{4} \mathrm{C}_{3}+12 \mathrm{H}_{2} \mathrm{O} \longrightarrow 4 \mathrm{Al}(\mathrm{OH})_{3}+3 \mathrm{CH}_{4}}}\) 3 moles of \({\mathrm{\mathrm{CH}_{4}}}\) are produced.
CHXI11:THE P-BLOCK ELEMENTS
316157
Which of the following carbides on treatment with water evolves methane?
1 \(\mathrm{CaC}_{2}\)
2 \(\mathrm{Al}_{4} \mathrm{C}_{3}\)
3 \(\mathrm{B}_{4} \mathrm{C}\)
4 \(\mathrm{SiC}\)
Explanation:
\({{\text{B}}_{\text{4}}}{\text{C}}\) and \(\mathrm{SiC}\) are covalent compounds which do not react with water. Salt like carbides such as \(\mathrm{CaC}_{2}\) and \(\mathrm{Al}_{4} \mathrm{C}_{3}\) react with water, the former giving acetylene and the later evolving methane. \(\mathrm{Al}_{4} \mathrm{C}_{3}+12 \mathrm{H}_{2} \mathrm{O} \rightarrow 4 \mathrm{Al}(\mathrm{OH})_{3}+3 \mathrm{CH}_{4} .\)
CHXI11:THE P-BLOCK ELEMENTS
316158
The number and type of bonds between two carbon atoms in \(\mathrm{CaC}_{2}\) are
316154
Which one of the following statements is wrong?
1 Ionic carbides are formed by highly electropositive metals
2 Carborundum and boron carbide are true covalent carbide
3 Carborundum and boron carbide are used as abrasive
4 \(\mathrm{Mg}_{2} \mathrm{C}_{3}\) like \(\mathrm{CaC}_{2}\) on hydrolysis evolves \(\mathrm{C}_{2} \mathrm{H}_{2}\)
Explanation:
\(\mathrm{Mg}_{2} \mathrm{C}_{3}\) gives propyne.
CHXI11:THE P-BLOCK ELEMENTS
316155
Which of the following is methanide?
1 \(\mathrm{Be}_{2} \mathrm{C}\)
2 \(\mathrm{CaC}_{2}\)
3 \(\mathrm{Mn}_{3} \mathrm{C}\)
4 \(\mathrm{Mg}_{3} \mathrm{C}_{2}\)
Explanation:
\({\rm{B}}{{\rm{e}}_{\rm{2}}}{\rm{C}}\) has \({{\rm{C}}^{{\rm{4 - }}}}\) ion and on hydrolysis gives \(\mathrm{CH}_{4}\).
CHXI11:THE P-BLOCK ELEMENTS
316156
How many moles of methane are obtained by the hydrolysis of one mole of aluminium carbide?
1 5
2 6
3 3
4 7
Explanation:
\({\mathrm{\mathrm{Al}_{4} \mathrm{C}_{3}+12 \mathrm{H}_{2} \mathrm{O} \longrightarrow 4 \mathrm{Al}(\mathrm{OH})_{3}+3 \mathrm{CH}_{4}}}\) 3 moles of \({\mathrm{\mathrm{CH}_{4}}}\) are produced.
CHXI11:THE P-BLOCK ELEMENTS
316157
Which of the following carbides on treatment with water evolves methane?
1 \(\mathrm{CaC}_{2}\)
2 \(\mathrm{Al}_{4} \mathrm{C}_{3}\)
3 \(\mathrm{B}_{4} \mathrm{C}\)
4 \(\mathrm{SiC}\)
Explanation:
\({{\text{B}}_{\text{4}}}{\text{C}}\) and \(\mathrm{SiC}\) are covalent compounds which do not react with water. Salt like carbides such as \(\mathrm{CaC}_{2}\) and \(\mathrm{Al}_{4} \mathrm{C}_{3}\) react with water, the former giving acetylene and the later evolving methane. \(\mathrm{Al}_{4} \mathrm{C}_{3}+12 \mathrm{H}_{2} \mathrm{O} \rightarrow 4 \mathrm{Al}(\mathrm{OH})_{3}+3 \mathrm{CH}_{4} .\)
CHXI11:THE P-BLOCK ELEMENTS
316158
The number and type of bonds between two carbon atoms in \(\mathrm{CaC}_{2}\) are
316154
Which one of the following statements is wrong?
1 Ionic carbides are formed by highly electropositive metals
2 Carborundum and boron carbide are true covalent carbide
3 Carborundum and boron carbide are used as abrasive
4 \(\mathrm{Mg}_{2} \mathrm{C}_{3}\) like \(\mathrm{CaC}_{2}\) on hydrolysis evolves \(\mathrm{C}_{2} \mathrm{H}_{2}\)
Explanation:
\(\mathrm{Mg}_{2} \mathrm{C}_{3}\) gives propyne.
CHXI11:THE P-BLOCK ELEMENTS
316155
Which of the following is methanide?
1 \(\mathrm{Be}_{2} \mathrm{C}\)
2 \(\mathrm{CaC}_{2}\)
3 \(\mathrm{Mn}_{3} \mathrm{C}\)
4 \(\mathrm{Mg}_{3} \mathrm{C}_{2}\)
Explanation:
\({\rm{B}}{{\rm{e}}_{\rm{2}}}{\rm{C}}\) has \({{\rm{C}}^{{\rm{4 - }}}}\) ion and on hydrolysis gives \(\mathrm{CH}_{4}\).
CHXI11:THE P-BLOCK ELEMENTS
316156
How many moles of methane are obtained by the hydrolysis of one mole of aluminium carbide?
1 5
2 6
3 3
4 7
Explanation:
\({\mathrm{\mathrm{Al}_{4} \mathrm{C}_{3}+12 \mathrm{H}_{2} \mathrm{O} \longrightarrow 4 \mathrm{Al}(\mathrm{OH})_{3}+3 \mathrm{CH}_{4}}}\) 3 moles of \({\mathrm{\mathrm{CH}_{4}}}\) are produced.
CHXI11:THE P-BLOCK ELEMENTS
316157
Which of the following carbides on treatment with water evolves methane?
1 \(\mathrm{CaC}_{2}\)
2 \(\mathrm{Al}_{4} \mathrm{C}_{3}\)
3 \(\mathrm{B}_{4} \mathrm{C}\)
4 \(\mathrm{SiC}\)
Explanation:
\({{\text{B}}_{\text{4}}}{\text{C}}\) and \(\mathrm{SiC}\) are covalent compounds which do not react with water. Salt like carbides such as \(\mathrm{CaC}_{2}\) and \(\mathrm{Al}_{4} \mathrm{C}_{3}\) react with water, the former giving acetylene and the later evolving methane. \(\mathrm{Al}_{4} \mathrm{C}_{3}+12 \mathrm{H}_{2} \mathrm{O} \rightarrow 4 \mathrm{Al}(\mathrm{OH})_{3}+3 \mathrm{CH}_{4} .\)
CHXI11:THE P-BLOCK ELEMENTS
316158
The number and type of bonds between two carbon atoms in \(\mathrm{CaC}_{2}\) are
316154
Which one of the following statements is wrong?
1 Ionic carbides are formed by highly electropositive metals
2 Carborundum and boron carbide are true covalent carbide
3 Carborundum and boron carbide are used as abrasive
4 \(\mathrm{Mg}_{2} \mathrm{C}_{3}\) like \(\mathrm{CaC}_{2}\) on hydrolysis evolves \(\mathrm{C}_{2} \mathrm{H}_{2}\)
Explanation:
\(\mathrm{Mg}_{2} \mathrm{C}_{3}\) gives propyne.
CHXI11:THE P-BLOCK ELEMENTS
316155
Which of the following is methanide?
1 \(\mathrm{Be}_{2} \mathrm{C}\)
2 \(\mathrm{CaC}_{2}\)
3 \(\mathrm{Mn}_{3} \mathrm{C}\)
4 \(\mathrm{Mg}_{3} \mathrm{C}_{2}\)
Explanation:
\({\rm{B}}{{\rm{e}}_{\rm{2}}}{\rm{C}}\) has \({{\rm{C}}^{{\rm{4 - }}}}\) ion and on hydrolysis gives \(\mathrm{CH}_{4}\).
CHXI11:THE P-BLOCK ELEMENTS
316156
How many moles of methane are obtained by the hydrolysis of one mole of aluminium carbide?
1 5
2 6
3 3
4 7
Explanation:
\({\mathrm{\mathrm{Al}_{4} \mathrm{C}_{3}+12 \mathrm{H}_{2} \mathrm{O} \longrightarrow 4 \mathrm{Al}(\mathrm{OH})_{3}+3 \mathrm{CH}_{4}}}\) 3 moles of \({\mathrm{\mathrm{CH}_{4}}}\) are produced.
CHXI11:THE P-BLOCK ELEMENTS
316157
Which of the following carbides on treatment with water evolves methane?
1 \(\mathrm{CaC}_{2}\)
2 \(\mathrm{Al}_{4} \mathrm{C}_{3}\)
3 \(\mathrm{B}_{4} \mathrm{C}\)
4 \(\mathrm{SiC}\)
Explanation:
\({{\text{B}}_{\text{4}}}{\text{C}}\) and \(\mathrm{SiC}\) are covalent compounds which do not react with water. Salt like carbides such as \(\mathrm{CaC}_{2}\) and \(\mathrm{Al}_{4} \mathrm{C}_{3}\) react with water, the former giving acetylene and the later evolving methane. \(\mathrm{Al}_{4} \mathrm{C}_{3}+12 \mathrm{H}_{2} \mathrm{O} \rightarrow 4 \mathrm{Al}(\mathrm{OH})_{3}+3 \mathrm{CH}_{4} .\)
CHXI11:THE P-BLOCK ELEMENTS
316158
The number and type of bonds between two carbon atoms in \(\mathrm{CaC}_{2}\) are
316154
Which one of the following statements is wrong?
1 Ionic carbides are formed by highly electropositive metals
2 Carborundum and boron carbide are true covalent carbide
3 Carborundum and boron carbide are used as abrasive
4 \(\mathrm{Mg}_{2} \mathrm{C}_{3}\) like \(\mathrm{CaC}_{2}\) on hydrolysis evolves \(\mathrm{C}_{2} \mathrm{H}_{2}\)
Explanation:
\(\mathrm{Mg}_{2} \mathrm{C}_{3}\) gives propyne.
CHXI11:THE P-BLOCK ELEMENTS
316155
Which of the following is methanide?
1 \(\mathrm{Be}_{2} \mathrm{C}\)
2 \(\mathrm{CaC}_{2}\)
3 \(\mathrm{Mn}_{3} \mathrm{C}\)
4 \(\mathrm{Mg}_{3} \mathrm{C}_{2}\)
Explanation:
\({\rm{B}}{{\rm{e}}_{\rm{2}}}{\rm{C}}\) has \({{\rm{C}}^{{\rm{4 - }}}}\) ion and on hydrolysis gives \(\mathrm{CH}_{4}\).
CHXI11:THE P-BLOCK ELEMENTS
316156
How many moles of methane are obtained by the hydrolysis of one mole of aluminium carbide?
1 5
2 6
3 3
4 7
Explanation:
\({\mathrm{\mathrm{Al}_{4} \mathrm{C}_{3}+12 \mathrm{H}_{2} \mathrm{O} \longrightarrow 4 \mathrm{Al}(\mathrm{OH})_{3}+3 \mathrm{CH}_{4}}}\) 3 moles of \({\mathrm{\mathrm{CH}_{4}}}\) are produced.
CHXI11:THE P-BLOCK ELEMENTS
316157
Which of the following carbides on treatment with water evolves methane?
1 \(\mathrm{CaC}_{2}\)
2 \(\mathrm{Al}_{4} \mathrm{C}_{3}\)
3 \(\mathrm{B}_{4} \mathrm{C}\)
4 \(\mathrm{SiC}\)
Explanation:
\({{\text{B}}_{\text{4}}}{\text{C}}\) and \(\mathrm{SiC}\) are covalent compounds which do not react with water. Salt like carbides such as \(\mathrm{CaC}_{2}\) and \(\mathrm{Al}_{4} \mathrm{C}_{3}\) react with water, the former giving acetylene and the later evolving methane. \(\mathrm{Al}_{4} \mathrm{C}_{3}+12 \mathrm{H}_{2} \mathrm{O} \rightarrow 4 \mathrm{Al}(\mathrm{OH})_{3}+3 \mathrm{CH}_{4} .\)
CHXI11:THE P-BLOCK ELEMENTS
316158
The number and type of bonds between two carbon atoms in \(\mathrm{CaC}_{2}\) are
