Question # 1

Under what conditions do real gases show close to ideal gas behavior?

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low pressure, low temperature

high pressure, low temperature

low pressure, high temperature

high pressure, high temperature

RNA regulate the synthesis of

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Vitamis

Carbohydrate

Proteins

Lipids

What is true for a molecule with standard geometry

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It lacks a Ip

It can't be a donor

It can be an acceptor

All

The forces which are present between the ions and the water molecules are known as

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dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

London dispersion forces

The hydrocarbon with maximum B.P is

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CH4

C6H14

C4H10

C2H6

Which of the following undergoes easy dehydration?

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3-MethyIbutan-2-ol

Ethanol

2.Methylpropan-2-ol

Methanol

A covalent bond may be

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100% covalent

Partial ionic

100% ionic

Both a and b

Baever's reagent is misture of

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HCI& ZnCl

Ageous bromine

Alkaline KMn4

Mix of Br2&KMnO4

An element from the given below exists as discrete small molecules in the solid state. Which is that?

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Sodium

Silicon

lodine

lron

Empirical formula of monosaccharide is

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(CHO)_n

CH_nO_n+1

C_nH₂O

(CH₂O)_n

Coagulation in the purification of water is carried out by

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Alum

NiSO₄

BaSO₄

CuSO₄

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Q and R Q and R

R only Q and R

Q and R R only

Q only R only

Which of the following elements does not show variable oxidation states?

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Copper

Iron

Zinc

Titanium

The addition of a catalyst to a reaction changes the

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Enthalpy

Entropy

Nature of reactants

Energy of activation

The cement plants in west Pakistan at the time of creation were:

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Ten

Twenty

Four

Twenty four

The use of tetra ethyl lead in petrol as an efficient antiknock agent is being discouraged. Which reason is correct

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It is costly

It damages the engine

Pb is difficult to obtain in bulk quantities

The combustion product, lead, causes air pollutions

Ifk_cof a reaction productis verylarge, it indicates that equilibrium occurs :

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With the help of a catalyst.

With no forward reaction.

At a low product concentration.

At a high product concentration.

Ammonia contains nitrogen in it:

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46%

50%

80%

82%

If the difference of pKa values of the two acids is 2, then

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Acid with smaller pKa is 10 times stronger acid

Acid with greater pKa is 10 times stronger acid

Acid with smaller pKa is 100 times stronger acid

Acid with greater pKa is 100 times stronger acid

The element which has a simple cubic lattice in solid state is

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Se

Te

Po

None of these

Ricket is caused due to the deficiency of vitamin

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A

D

B

E

Nitrogen in NH₃is sp³hybridized but the bond angle in NH₃is 107° and not 109.5° due to

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sp³orbital planar

sp³orbital trigonal

Repulsion between lone pair and bonded pairs

None of them

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