Question # 1

The simplest formula of a compound containing 50% of element X

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XY2

XY

X2Y

None of the abvoe

CNG is stored under

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Power genertion

Electric Generators

Solvent

All of above

The high oxidizing power of halogens is favored by.

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Low heat od dissociation of X2

A high electron affinity of the atom

A higher hydration energy of the ion

All of above

Which of the following water require zero hardness.

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Boiler feed water

Laundry water

Paper will water

Dyeing water

Electronegativity of Oygen is.

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2.5

3.5

2.4

2.1

A mixture of weak acid and its salt is.

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Alkaline buffer

Acidic buffer

Neutral buffer

All of above

Boric acid is added to glass because is.

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Makes the glass opalescent

Reduces the coefficient of expansion

Makes the glass brittle

Increase refractive index of the glass.

The titration involving oxidation reduction reactions is called.

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Complex titration

Simplex titration

Redox titration

Acid base titration

Inductive effect can be used to explain

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Dipole moment of chemical bonds

Strength of acids

Strength of bases

All above

The first step of formation of sugar is

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Extraction

Washing

Cutting

Clarifying

The following alloys are the chief alloys that are die cast except.

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Zinc alloys

Magnesium alloys

Manganese alloys

Nickel alloys

Which of the following statements is wrong.

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Covenant compounds are generally soluble is polar solvents.

Covalent compounds have low melting and boiling points

Lower than that of separate H atoms

Sometimes lower and sometimes higher than that of separate H

The entropy of the universe

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Tends towards a maximum

Tend towards a maximum

Tends to be zero

Remains constatn

A high frequency sound has frequency

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100 Hz

200 HZ

300 Hz

500 Hz

Oxytocin, a pituitary hormone to

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Amino acid

Polypeptide

Protein

Conjugated protein

According to SHAH concept the Lewis bases were classified on the basis os.

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Charge ion size

Polarization consideration

Electron and co coordinating ability

All of above

The pair of molecules or ions having identical geometry is.

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BCl3, PCl3

BF3, NH3

CHCl3, CCl4

SiCl4, CCl4

Which of the following metal ion cannot be catimated by gravimetric analysis.

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K+

Ca²⁺

Al3+

Zn2+

The reagent which can be used to distinguish acetophenone from benzophenone is.

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2,4 -dinito phenyl hydrazine

Li AIH4

Benedict reagetn

I2 and Na2CO3

Which metal can produce dihydrogen gas by reaction with dil H2SO4

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Ag

Fe

Cu

Pt

In a system of designating wrought aluminum alloys. what does the second digit represents.

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The purity of aluminum

The identity of the alloy

The modification of the alloy group or impurity limits

None of above

Which of the following is not a general property of amino acids.

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They have high m.p. and b.p

They are soluble in water

Their dipole moments are high

They are amorphous solids

Carbohydrates are characterized by the presence of.

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Hydroxyl group

Carbony group

Asymmetric carbon

All of these

Bitumen is used in

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Electric generators

Road surfacing

Coal tar

All of above

Which of the following process is involved in nitrogen flotation

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Non symmetric fixation of nitrogen

Fixation by soil bacteria

Fixation by yeast

Fixation by blue green algae

All above

The ionization potential of K would be numerically equal to.

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Electron affinity of Ar

Electromagnetically of K

Electron affinity of K+

ionization energy of Ca

In second group of inorganic qualitative analysis, the S^2-ions does not form precipitate with which of the following ions.

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^Hg2+

Cu²⁺

Ai³⁺

Cd³⁺

Aluminum is an active metal but does not corrode as iron does because.

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Ai does not react with O2

A protective layer of Al2 O3 forms on the metal surface

AI is harder to Oxidize than is Fe

Aluminium has a high tensile strength

Select the correct IUPAC name for [FeF4(OH)2]-

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Diaquatrafluoriron (III) ion

Diaquateratrafluoriferrate (III) ion

Diaquatertrafluoroiron (I)

None of these

Which one of the following sets of elements has the strongest tendency to form positive ions in gaseous state.

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Li, Na, K

F, Cl, Br

Be, Mg, Ca

O, S , Se

The bond order for BO molecule is.

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2.5

3.0

2.0

3.5

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