189331
In the nitrogen family the \(H - M - H\) bond angle in the hydrides \(M{H_3}\) gradually becomes closer to \({90^o}\) on going from \(N\) to \(Sb\). This shows that gradually
1 The basic strength of hydrides increases
2 Almost pure \(p\) - orbitals are used for \(M - H\) bonding
3 The bond energies of \(M - H\) bond increase
4 The bond pairs of electrons become nearer to the central atom
Explanation:
Bond strength \(\propto\) Bond angle Basic strength decreases. Electron negativity decreases. Bond energies decrease. Bond pair come closer to each other.
07. The p-BLOCK ELEMENTS (XII)
189332
An element \((X)\) forms compounds of the formula \(XC{l_3},\) \({X_2}{O_5}\) and \(C{a_3}{X_2},\) but does not form \(XC{l_5}\), which of the following is the element \(X\)
1 \(B\)
2 \(Al\)
3 \(N\)
4 \(P\)
Explanation:
(c) \({N_2}\) can form \(NC{l_3}\), \({N_2}{O_5}\) and \(Ca_3N_2\) but does not form \(NC{l_5}\).
07. The p-BLOCK ELEMENTS (XII)
189334
Which of the following oxy acids of phosphorus is a reducing agent and monobasic
1 \({H_3}P{O_2}\)
2 \({H_3}P{O_3}\)
3 \({H_3}P{O_4}\)
4 \({H_4}{P_2}{O_6}\)
Explanation:
(a) Hypophosphorus acid \(({H_3}P{O_2})\) is a monobasic acid which act as reducing agent. In this molecule two \(P - H\) bonds are responsible for its reducing character and one \(O-H\) bond is responsible for its monobasic acid character.
07. The p-BLOCK ELEMENTS (XII)
189335
Bone black is a polymorphic form of
1 Phosphorus
2 Sulphur
3 Carbon
4 Nitrogen
Explanation:
(a)Bone black is the polymorphic form of phosphorus.
189331
In the nitrogen family the \(H - M - H\) bond angle in the hydrides \(M{H_3}\) gradually becomes closer to \({90^o}\) on going from \(N\) to \(Sb\). This shows that gradually
1 The basic strength of hydrides increases
2 Almost pure \(p\) - orbitals are used for \(M - H\) bonding
3 The bond energies of \(M - H\) bond increase
4 The bond pairs of electrons become nearer to the central atom
Explanation:
Bond strength \(\propto\) Bond angle Basic strength decreases. Electron negativity decreases. Bond energies decrease. Bond pair come closer to each other.
07. The p-BLOCK ELEMENTS (XII)
189332
An element \((X)\) forms compounds of the formula \(XC{l_3},\) \({X_2}{O_5}\) and \(C{a_3}{X_2},\) but does not form \(XC{l_5}\), which of the following is the element \(X\)
1 \(B\)
2 \(Al\)
3 \(N\)
4 \(P\)
Explanation:
(c) \({N_2}\) can form \(NC{l_3}\), \({N_2}{O_5}\) and \(Ca_3N_2\) but does not form \(NC{l_5}\).
07. The p-BLOCK ELEMENTS (XII)
189334
Which of the following oxy acids of phosphorus is a reducing agent and monobasic
1 \({H_3}P{O_2}\)
2 \({H_3}P{O_3}\)
3 \({H_3}P{O_4}\)
4 \({H_4}{P_2}{O_6}\)
Explanation:
(a) Hypophosphorus acid \(({H_3}P{O_2})\) is a monobasic acid which act as reducing agent. In this molecule two \(P - H\) bonds are responsible for its reducing character and one \(O-H\) bond is responsible for its monobasic acid character.
07. The p-BLOCK ELEMENTS (XII)
189335
Bone black is a polymorphic form of
1 Phosphorus
2 Sulphur
3 Carbon
4 Nitrogen
Explanation:
(a)Bone black is the polymorphic form of phosphorus.
189331
In the nitrogen family the \(H - M - H\) bond angle in the hydrides \(M{H_3}\) gradually becomes closer to \({90^o}\) on going from \(N\) to \(Sb\). This shows that gradually
1 The basic strength of hydrides increases
2 Almost pure \(p\) - orbitals are used for \(M - H\) bonding
3 The bond energies of \(M - H\) bond increase
4 The bond pairs of electrons become nearer to the central atom
Explanation:
Bond strength \(\propto\) Bond angle Basic strength decreases. Electron negativity decreases. Bond energies decrease. Bond pair come closer to each other.
07. The p-BLOCK ELEMENTS (XII)
189332
An element \((X)\) forms compounds of the formula \(XC{l_3},\) \({X_2}{O_5}\) and \(C{a_3}{X_2},\) but does not form \(XC{l_5}\), which of the following is the element \(X\)
1 \(B\)
2 \(Al\)
3 \(N\)
4 \(P\)
Explanation:
(c) \({N_2}\) can form \(NC{l_3}\), \({N_2}{O_5}\) and \(Ca_3N_2\) but does not form \(NC{l_5}\).
07. The p-BLOCK ELEMENTS (XII)
189334
Which of the following oxy acids of phosphorus is a reducing agent and monobasic
1 \({H_3}P{O_2}\)
2 \({H_3}P{O_3}\)
3 \({H_3}P{O_4}\)
4 \({H_4}{P_2}{O_6}\)
Explanation:
(a) Hypophosphorus acid \(({H_3}P{O_2})\) is a monobasic acid which act as reducing agent. In this molecule two \(P - H\) bonds are responsible for its reducing character and one \(O-H\) bond is responsible for its monobasic acid character.
07. The p-BLOCK ELEMENTS (XII)
189335
Bone black is a polymorphic form of
1 Phosphorus
2 Sulphur
3 Carbon
4 Nitrogen
Explanation:
(a)Bone black is the polymorphic form of phosphorus.
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07. The p-BLOCK ELEMENTS (XII)
189331
In the nitrogen family the \(H - M - H\) bond angle in the hydrides \(M{H_3}\) gradually becomes closer to \({90^o}\) on going from \(N\) to \(Sb\). This shows that gradually
1 The basic strength of hydrides increases
2 Almost pure \(p\) - orbitals are used for \(M - H\) bonding
3 The bond energies of \(M - H\) bond increase
4 The bond pairs of electrons become nearer to the central atom
Explanation:
Bond strength \(\propto\) Bond angle Basic strength decreases. Electron negativity decreases. Bond energies decrease. Bond pair come closer to each other.
07. The p-BLOCK ELEMENTS (XII)
189332
An element \((X)\) forms compounds of the formula \(XC{l_3},\) \({X_2}{O_5}\) and \(C{a_3}{X_2},\) but does not form \(XC{l_5}\), which of the following is the element \(X\)
1 \(B\)
2 \(Al\)
3 \(N\)
4 \(P\)
Explanation:
(c) \({N_2}\) can form \(NC{l_3}\), \({N_2}{O_5}\) and \(Ca_3N_2\) but does not form \(NC{l_5}\).
07. The p-BLOCK ELEMENTS (XII)
189334
Which of the following oxy acids of phosphorus is a reducing agent and monobasic
1 \({H_3}P{O_2}\)
2 \({H_3}P{O_3}\)
3 \({H_3}P{O_4}\)
4 \({H_4}{P_2}{O_6}\)
Explanation:
(a) Hypophosphorus acid \(({H_3}P{O_2})\) is a monobasic acid which act as reducing agent. In this molecule two \(P - H\) bonds are responsible for its reducing character and one \(O-H\) bond is responsible for its monobasic acid character.
07. The p-BLOCK ELEMENTS (XII)
189335
Bone black is a polymorphic form of
1 Phosphorus
2 Sulphur
3 Carbon
4 Nitrogen
Explanation:
(a)Bone black is the polymorphic form of phosphorus.
