Main-group Compounds - s, p and d Block Elements - Life Sciences Previous Year Questions

1

2007 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2007

The correct arrangement of group 13 elements in terms of increasing average M-Cl bond energy in MCl3 compounds is

A

Al > Ga > In > Tl

B

Tl > In > Ga > Al

C

Al > Ga > Tl > In

D

Ga > In > Tl > Al

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2

2007 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2007

The reaction between P and water forms a new compound R. Compound R gives bleaching powder on reaction with Cl2. The compound X is

A

NH₄NO₃

B

KClO₃

C

CaCO₃

D

CuFeS₂

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3

2008 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2008

Ammonia gas can be dried over

A

conc. \(H_2SO_4\)

B

anhydrous \(P_2O_5\)

C

anhydrous CaO

D

anhydrous \(CaCl_2\)

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4

2008 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2008

Which of the following substances will produce acidic oxides when burnt in excess air?
Sodium (P), Sulfur (Q) and Methane (R)

A

All three

B

Both Q and R

C

Only Q

D

Both P and R

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5

2009 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2009

The reaction of \( AgNO_3 \) with KCl in an aqueous environment leads to an insoluble product P. Treatment of P with an excess of KCl leads to its dissolution because of the formation of Q. P and Q respectively are

A

AgCl and \([AgCl_2]^- \)

B

\([AgCl_2]^- \) and AgCl

C

AgCl and \([AgCl_4]^{3-} \)

D

\([AgCl_4]^{3-} \) and \([AgCl_2]^{2-} \)

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6

2009 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2009

Identify P among the following :

A

BH₃

B

Na[B₃H₈]

C

B₂H₆

D

B₄H₁₀

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7

2009 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2009

The compound Q is

A

BH₃·NMe₃

B

B₂H₅·NMe₃

C

B₄H₈·NMe₃

D

BH₃·2NMe₃

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8

2010 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2010

Reaction of Na2S2O3 with 2 equivalents of HCl produces a gas X. Solution of X in water is acidic in nature. X is

A

O₂

B

Cl₂

C

SO₂

D

H₂S

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9

2011 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2011

Which one of the following compounds is known as silanes?

A

Silicon hydrides

B

Silicon halides

C

Silicon hydroxides

D

Silicon oxides

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10

2013 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2013

Iodine forms an anionic species \(\mathbf{Q}\) in aqueous solution of iodide(\(I^-\)). The number of lone pair(s) of electrons on the central atom of \(\mathbf{Q}\) is ____________

Check answer

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11

2016 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2016

The correct statement is

A

\(TlBr_3 \) is less soluble in water than \(TlBr \)

B

\(Ag_2S \) is more soluble in water than \(Ag_2O \)

C

\(LiF \) is less stable than \(CsF \)

D

\([Co(NH_3)_6]^{3+} \) is less stable than \([Co(NH_3)_6]^{2+} \)

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12

2023 · Life Sciences · s, p and d Block Elements · Main-group Compounds

Life Sciences (XL) 2023

The CORRECT order of stability of the given metal oxides is

A

LiO₂ > NaO₂ > KO₂ > RbO₂

B

LiO₂ < NaO₂ < KO₂ < RbO₂

C

LiO₂ < NaO₂ > KO₂ > RbO₂

D

LiO₂ > NaO₂ < KO₂ < RbO₂

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