Question # 1

The most unsymmetrical one in crystal system is

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triclinic

Li, Na, K

monoclinic

hexagonal

Which of the following formula is correct for density of any gas

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d = RT/PM

d = PM/RT

d = MT/PR

d = RM/PT

The critical temperature of NH₃ is greater than CO₂ due to its:

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Greater polarity

Stable polarity

Lesser polarity

None of above

Sponification is the hydrolysis of fast or fats or4 oils with an/a:

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acid

alkali

enzyme

metallic ion

At present the number or cement factories in Pakistan are:

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20

22

25

30

Dipole-dipole forces are present between:

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non-polar molecules

polar molecules

both polar and non-polar

none pf above

Which forms metallic cyrstals

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Cu

NaCl

Diamond

None

Ozone is most of the tropical regions acts as a pollutant and causes

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Damages to eyes

Aggravates asthma

Chest discomfort

All of these

Which equation among the following is applicable to an ideal gas equation?

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P = nRT

P = MRT

P = dPRT/M

V = dRT/M

Exhaust fumes of cars contain which poisonous gas

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CH₄

C₂H₆

CO

All of these

In crystal structure of sodium chloride,the arrangement of CI^- ions is

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Fcc

Both fcc and bcc

Bcc

None of these

During oxidation in k₂Cr₂O_{7, Cr VI changes to :}

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I

II

III

IV

Law of mass action was given by :

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Guldberg and Waage.

Berkeley and Hartly.

Ramsay and Reyleigh.

Berthelot.

A solution consisting of 92 grams ethyl alcohol (C₂H₅OH) 96 grams methyl alcohol (CH₃OH) 90 grams water the mole fraction and mole percent of methyl alcohol is

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0.3. 30%

0.2, 30%

0.5, 30%

0.2, 20%

Which one of the following is a product of the reaction between C₆H₅CH₂OH and CH₃COCI

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C₆H₅OCOCH₃

C₆H₅CH₂CI

C₆H₅CH₂OCOCH₃

C₆H₅CH₂COCI

When benzene is burnt in free supply of air, it is completely oxidized to

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CO

CO₂₊H₂O

H₂CO₃

None

A nuclophile must

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Be an atom

A group of atoms

Have a lone pair

Be negatively charged

Interstitial compounds have

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Half formula

Fixed formula

Indefinite formula

None

Functional group of ketones is:

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---CHO

---CO---

---C≡ N

---COOH

Which of the following will have the highest boiling point at 1 atm pressure?

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0.1 M NaCl

0.1 M Sucrose

0.1 M BaCl₂

0.1 M Glucose

Group VI-B of transition elements contains:

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Zn, Cd, Hg

Fe ,Ru ,Os

Cr, Mo ,W

Mn, Te, Re

The less reactivity of transition metal is due to

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High heats of sublimation

High ionization energies

Low heats of salvation

All these

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