Question # 1

Types of carides

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Ionic carides

Covalent carbides

Interstitial carbides

All above

H-Bonding also ox in ling system like

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Protein

DNA

Botha A and B

None of above

Highly dangerous acid and produces severe wounds on the skin.

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HCIO

HCIO2

HCIO3

HCIO4

Pig iron is also called.

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Cast iron

Steel

Wrought iron

Stainless steel

Arrange the hydrides group 15 in the order of increasing boiling point.

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PH3 < AsH3 <SbH3 < BiH3 <NH3

PH3 <AsH3< SbH3< NH3 < BiH3

PH3 < AsH3<NH3 <SbH3<BiH3

NH3 < PH3 < AsH3 < Sb H3 < BiH3

Which of the following is the most stable towards heat.

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CaCO3

BaCO3

Na2CO3

MgCO3

The electronic configuration of chromium is 4s1, 3d5, The elements tungsten (W) belongs to the same group and has atomic number 74.The configuration of its valence shell is.

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5s1, 4d5

6s1, 5d5

6s1, 5d6

6s1, 5d4

Which isotope of hydrogen is radioactive in nature.

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Protium and deuterium

Tritium only

Tritium and deuterium

Only deuterium

Among sodium phosphate, sodium sulphate and sodium chloride the solubility in water increases as.

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Chloride > Phosphate > Sulphate

Sulphate > Pohosphate> Chloride

Chloride > Sulphate > Phosphate

Phosphate > Chloride > Sulphate

Buffer solution are used to.

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Increase the pH

Resist the pH

Decrease the pH

None of above

Nitric acid is used in the manufacturing of.

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Dyes

Drugs

Artificial silk

All above

The _________ sphere is enclosed in brackets in formulas for complex species, and it includes the central metal ion plus the coordinated group

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Ligand

Donor

Coordination

Oxiation

Which of the following is most soluble in water.

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BaSO4

Sr SO4

CaSO4

MgSO4

The electronegativity of phosphorus is.

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3.0

2.1

2.0

1.9

A thionic acid

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H2S2O3

H2S2O6

H2S2O8

H2S2O7

The electromagevitiy of the following elements increase in the order

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F > Cl > O > S

S > Cl > O > F

F > O > N > C

C > O > N > F

Which is the strongest reducing agent.

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HF

HCl

HBr

HI

The hydrogen bond is strongest in.

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O - H .............S

S - H.............O

F- H....................F

F - H...............O

Which among the following is insoluble in water.

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LiOH

KOH

NaOH

RbOH

Magnesium burns in air to give.

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MgO

MgCO3

Mg3N2

Both A and C

In the formation of H2O molecule, the oxygen atom makes use of.

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2p orbitals

sp hybrid orbitals

Sp2 hybrid orbitals

Sp3 hybrid orbitals

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