In the brown ring test, brown colour of the ring is due to _______.

(a)

a mixture of No and NO₂

(b)

Nitroso ferrous sulphate

(c)

Ferrous nitrate

(d)

Ferric nitra

On oxidation with iodine, sulphite ion is transformed to _______.

(a)

S₄O₆^2-

(b)

S₂O₆^2-

(c)

SO₄^2-

(d)

SO₃^2-

Which of the following is correct?

(a)

H₃PO₃ is dibasic and reducing

(b)

H₃PO₃ is dibasic and non-reducing

(c)

H₃PO₄ is tribasic and reducing

(d)

H₃PO₃ is tribasic and non-reducing

Catenation property of group 15 elements, follow the order _______.

(a)

N < P < As < Sb < Bi

(b)

P >> N > As > Sb > Bi

(c)

P < N < As < Sb < Bi

(d)

N>> P > As > Sb > Bi

Which of the following halides of group 15 is not hydrolysed?

(a)

NF₃

(b)

PF₃

(c)

NI₃

(d)

Both (a) and (b)

Which is dibasic?

(a)

Orthophosphoric acid

(b)

Pyrophosphoric acid

(c)

Orthophosphorus acid

(d)

Hypophosphorus acid

The hybridisation and shape of SF₆ is respectively?

(a)

sp³d², square planar

(b)

sp³d², octahedral

(c)

sp³d see-saw

(d)

sp³d, trigonal bipyramindal

Allotrope of sulphur which shows paramagnetic behaviour _______.

(a)

S₈- Rhombic

(b)

S₈- Monoclinic

(c)

S₂- In vapour phase

(d)

Not possible

S-S bond is present in _______.

(a)

H₂S₂O₇

(b)

H₂SO₅

(c)

H₂S₂O₆

(d)

H₂S₂O₆

Pick the wrong one among the following

(a)

F₂ - Yellow

(b)

Br₂ - Red

(c)

Cl₂ - Colourless

(d)

I₂- Violet

Hot concentrated H₂SO₄ is miderately strong oxidising agent which of the following reactions does not show oxidising behaviour?

(a)

\(Cu+2H_{ 2 }{ SO }_{ 4 }\longrightarrow { CuSO }_{ 4 }+{ SO }_{ 2 }+{ 2H }_{ 2 }O\)

(b)

\(Cu+2H_{ 2 }{ SO }_{ 4 }\longrightarrow { CuSO }_{ 4 }+{ SO }_{ 2 }+{ 2H }_{ 2 }O\)

(c)

\(Cu+2H_{ 2 }{ SO }_{ 4 }\longrightarrow { CuSO }_{ 4 }+{ SO }_{ 2 }+{ 2H }_{ 2 }O\)

(d)

\({ CaF }_{ 2 }+{ H }_{ 2 }SO_{ 4 }\longrightarrow { CaCO }_{ 4 }+2HF\)

When Copper is heated with cone HNO₃ it produces

(a)

Cu (NO₃)₂ and N₂O

(b)

Cu (NO₃)₂ and NO₂

(c)

Cu (NO₃)₂ and NO

(d)

Cu (NO₃)₂ NO and N₂O

Least volatile hydrogen halide is ______.

(a)

HF

(b)

HCI

(c)

HBr

(d)

HI

Oxalic acid on heating with cone H₂SO₄ gives ______.

(a)

CO only

(b)

CO₂ only

(c)

CO₂ + H₂O

(d)

CO + CO₂ + H₂O

Which one of the following orders is not in accordance with the property stated against it?

(a)

F₂ > CI₂ > Br₂ > I₂: Bond dissociation energy

(b)

HI > HBr > HCI > HF: Acidic property in water

(c)

F₂ > Cl₂ > Br₂ > l₂: Oxidising power

(d)

F₂ > Cl₂ > Br₂ > l₂: Electronegativity