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8 RBTS PAPER

164427 The correct order of acidic strength is :

1

{SO}_{2} < P_{2} O_{3} < {SiO}_{2} < {Al}_{2} O_{3}

2

{SiO}_{2} < {SO}_{2} < {Al}_{2} O_{3} < P_{2} O_{3}

3

{Al}_{2} O_{3} < {SiO}_{2} < {SO}_{2} < P_{2} O_{3}

4

{Al}_{2} O_{3} < {SiO}_{2} < P_{2} O_{3} < {SO}_{2}

NCERT-XI-94

8 RBTS PAPER

164417 The covalent and vanderwaal's radii of $H$ atom respectively are :

1

0.37 \AA, 0.8 \AA

2

0.8 \AA, 0.37 \AA

3

0.8 \AA, 0.8 \AA

4

0.37 \AA, 0.37 \AA

Explanation:

Vander Waal's radii is larger than covalent $r_{v} > r_{c}$

8 RBTS PAPER

164424 Find the formula of halide of metal whose successive ionisation energies are $x, 2 x$ and $50 x$ $kJ / mol$ respectively :

1

{MX}_{2}

2

{MX}_{4}

3

M_{2} X

4

M X_{3}

Explanation:

$M$ has $2 e^{-}$ in the valence shell
$M$ halide : ${MX}_{2}$

NCERT-XI-89

8 RBTS PAPER

164418 Choose the endothermic process :

1

F (g) + e^{-} \to F^{-} (g)

2

Cl (g) \to {Cl}^{+} (g) + e^{-}

3

O^{-} (g) + e^{-} \to O^{2 -} (g)

4 Both 2 and 3

Explanation:

Ionisation energy and second electron gain enthalpy are endothermic processes.
$Cl (g) \to {Cl}^{+} (g) + e^{-}$
$O^{-} (g) + e^{-} \to O^{2 -} (g)$

NCERT-XI-87

8 RBTS PAPER

164427 The correct order of acidic strength is :

1

{SO}_{2} < P_{2} O_{3} < {SiO}_{2} < {Al}_{2} O_{3}

2

{SiO}_{2} < {SO}_{2} < {Al}_{2} O_{3} < P_{2} O_{3}

3

{Al}_{2} O_{3} < {SiO}_{2} < {SO}_{2} < P_{2} O_{3}

4

{Al}_{2} O_{3} < {SiO}_{2} < P_{2} O_{3} < {SO}_{2}

NCERT-XI-94

8 RBTS PAPER

164417 The covalent and vanderwaal's radii of $H$ atom respectively are :

1

0.37 \AA, 0.8 \AA

2

0.8 \AA, 0.37 \AA

3

0.8 \AA, 0.8 \AA

4

0.37 \AA, 0.37 \AA

Explanation:

Vander Waal's radii is larger than covalent $r_{v} > r_{c}$

8 RBTS PAPER

164424 Find the formula of halide of metal whose successive ionisation energies are $x, 2 x$ and $50 x$ $kJ / mol$ respectively :

1

{MX}_{2}

2

{MX}_{4}

3

M_{2} X

4

M X_{3}

Explanation:

$M$ has $2 e^{-}$ in the valence shell
$M$ halide : ${MX}_{2}$

NCERT-XI-89

8 RBTS PAPER

164418 Choose the endothermic process :

1

F (g) + e^{-} \to F^{-} (g)

2

Cl (g) \to {Cl}^{+} (g) + e^{-}

3

O^{-} (g) + e^{-} \to O^{2 -} (g)

4 Both 2 and 3

Explanation:

Ionisation energy and second electron gain enthalpy are endothermic processes.
$Cl (g) \to {Cl}^{+} (g) + e^{-}$
$O^{-} (g) + e^{-} \to O^{2 -} (g)$

NCERT-XI-87

8 RBTS PAPER

164427 The correct order of acidic strength is :

1

{SO}_{2} < P_{2} O_{3} < {SiO}_{2} < {Al}_{2} O_{3}

2

{SiO}_{2} < {SO}_{2} < {Al}_{2} O_{3} < P_{2} O_{3}

3

{Al}_{2} O_{3} < {SiO}_{2} < {SO}_{2} < P_{2} O_{3}

4

{Al}_{2} O_{3} < {SiO}_{2} < P_{2} O_{3} < {SO}_{2}

NCERT-XI-94

8 RBTS PAPER

164417 The covalent and vanderwaal's radii of $H$ atom respectively are :

1

0.37 \AA, 0.8 \AA

2

0.8 \AA, 0.37 \AA

3

0.8 \AA, 0.8 \AA

4

0.37 \AA, 0.37 \AA

Explanation:

Vander Waal's radii is larger than covalent $r_{v} > r_{c}$

8 RBTS PAPER

164424 Find the formula of halide of metal whose successive ionisation energies are $x, 2 x$ and $50 x$ $kJ / mol$ respectively :

1

{MX}_{2}

2

{MX}_{4}

3

M_{2} X

4

M X_{3}

Explanation:

$M$ has $2 e^{-}$ in the valence shell
$M$ halide : ${MX}_{2}$

NCERT-XI-89

8 RBTS PAPER

164418 Choose the endothermic process :

1

F (g) + e^{-} \to F^{-} (g)

2

Cl (g) \to {Cl}^{+} (g) + e^{-}

3

O^{-} (g) + e^{-} \to O^{2 -} (g)

4 Both 2 and 3

Explanation:

Ionisation energy and second electron gain enthalpy are endothermic processes.
$Cl (g) \to {Cl}^{+} (g) + e^{-}$
$O^{-} (g) + e^{-} \to O^{2 -} (g)$

NCERT-XI-87

8 RBTS PAPER

164427 The correct order of acidic strength is :

1

{SO}_{2} < P_{2} O_{3} < {SiO}_{2} < {Al}_{2} O_{3}

2

{SiO}_{2} < {SO}_{2} < {Al}_{2} O_{3} < P_{2} O_{3}

3

{Al}_{2} O_{3} < {SiO}_{2} < {SO}_{2} < P_{2} O_{3}

4

{Al}_{2} O_{3} < {SiO}_{2} < P_{2} O_{3} < {SO}_{2}

NCERT-XI-94

8 RBTS PAPER

164417 The covalent and vanderwaal's radii of $H$ atom respectively are :

1

0.37 \AA, 0.8 \AA

2

0.8 \AA, 0.37 \AA

3

0.8 \AA, 0.8 \AA

4

0.37 \AA, 0.37 \AA

Explanation:

Vander Waal's radii is larger than covalent $r_{v} > r_{c}$

8 RBTS PAPER

164424 Find the formula of halide of metal whose successive ionisation energies are $x, 2 x$ and $50 x$ $kJ / mol$ respectively :

1

{MX}_{2}

2

{MX}_{4}

3

M_{2} X

4

M X_{3}

Explanation:

$M$ has $2 e^{-}$ in the valence shell
$M$ halide : ${MX}_{2}$

NCERT-XI-89

8 RBTS PAPER

164418 Choose the endothermic process :

1

F (g) + e^{-} \to F^{-} (g)

2

Cl (g) \to {Cl}^{+} (g) + e^{-}

3

O^{-} (g) + e^{-} \to O^{2 -} (g)

4 Both 2 and 3

Explanation:

Ionisation energy and second electron gain enthalpy are endothermic processes.
$Cl (g) \to {Cl}^{+} (g) + e^{-}$
$O^{-} (g) + e^{-} \to O^{2 -} (g)$

NCERT-XI-87

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