Question # 1

Inorganic acids (HCl, HBr, HNO3 etc) have K value.

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< 1

>1

>10

<10

Which of the following gas form weakly acidic sulphurous acid

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SO2

SO3

NO2

NO

Which of the following solutions of sulphuric acid will exactly neutralize 25 mL. of 0.2 M NaOH

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12.5 mL of 0.1 M solution

24 mL OF 0.1 m Solution

50 mL of 0.1 M solution

None of the above

Orion is polymer of.

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Styrene

CF2 = CF2

Vinyl chloride

Acrylontrile

Which of the following compounds does not show dipole moment.

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CH3OH

HBr

CCl4

CHCl3

In sodium chloride type lattice, the ratio of coordination number of cation to anion is.

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6:6

7:7

4:8

4:4

Which of the following is most soluble in water

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CaSO4

Sr SO4

MgSO4

BaSO4

Which of the following is not a colligative property.

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Elevation of B.P.

Depresaion in F.P

Viscosity

Osmotic pressure

Both the elements are typical non metals.

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B & Ai

B & Si

Al & Si

Any of above

What refers to a shape achieved by allowing a liquid to solidify in a mold.

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Casting

Molding

Forming

All of the choices

Hybridization involves.

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Orbitals of same atom with slightly different energies.

Orbitals of different atoms, but with equal energies.

Orbitals of the same atom but with widely different energies.

Orbitals of different atoms with different energies.

White Phosphorus is kept under

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Cold water

Ammonia liquor

Ethanol

Kerosene

Which of the following is the statement of third law of thermodynamics.

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Entroy of perfectly crystalline substance is zero at T = 0

Entropy of a perfectly crystaline substance is zero at standard state conditions

Entropy and enthalpy of a substance become equal at T = 0

Free energy of a crystalline substance is zero at T = 0

Which of the following elements would have the lowest first ionization energy

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Mg

Rb

Li

Ca

The condensation between formaldehyde and acetaldehyde in the presence of conc. NaOH and heat gives.

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Acrolein

Mixture of CH3OH and CH3COO Na.

Mixture of CH3CH2OH and HCOO - Na+

None of these

The diameter of hydrogen atom is.______________nm

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10

1

0.1

0.01

Fluorine finds considerble use of DDFT which is used as.

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herbicide

Fungacide

Insecticide

Nomatocides

The percentage of s-character in the hybrid orbitals sp, sp2 and sp3 follows the pattern.

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sp3 > sp2 > sp

sp > sp2 > sp3

sp = sp2 >sp3

sp = sp2 =sp3

Chlorine when attached to benzene has

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+1 and + R effect

-1 and - R effect

-1 and +R effect

None of the above

The first ionization energies of the elements of the first transition series. (Ti _____ Cu)

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Increases as the atomic number increases

decreases as the atomic number increases

Do not show any change as the addition of electrons takes place in the inner (n-1) d -orbitals.

Increases from Ti to Mn and then decreases from Mn to Cu

BCl3 is an example of hybridization

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sp

sp2

sp3

None of above

Which of the following property has a higher value for trans isomer as compared to cis isomer.

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Density

Dipole moment

Melting point

Boiling point

The atomic orbitals are progressively filled in order of increasing energy. This statement is called as

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Hund's rule

Aufbau's rule

(n+1) rule

Planck's rule

In the reaction RCO2Na + Na OH (CaO) ______ RH, we eliminate carboxylate group as.

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CO2

Na2CO3

-CO

CaCO3

The property measured in DTA is

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Heat effects

Weight loss

Rate of change in weight

Change in temperature

The dipole moments of the given species are such that.

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BF3 > NF3 > NH3

NF3 > BF3 > NH3

NHE > NF3 >BF3

NH3 > BF3 > NF3

Which of the following analytical techniques can be used to extract metal ion chelates.

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Solvent extractions

Evaporation

GC

Distillation

For a chemical reaction A ___________ produce, the rat of the reaction doubles when the concentration of A is increased by 4 times the order of the reaction is.

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0

1

1/2

4

In German Silver copper is alloyed with which metal.

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Zn

Ni

Ai

Zn and Ni

Electronegativity of oxygen is.

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2,5

3,5

2,4

2.1

Types of carides

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Ionic carides

Covalent carbides

Interstitial carbides

All above

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