Question # 1

The shape of CIO^-₃according to valence shell electron pair repulsion theory will be

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Planar triangle

Pyramidal

Tetrahedral

Square planar

What is the total number of different chloroethanes, formula C₂H_6-nCl_n, where n can be any integer from 1 to 4

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4

6

7

8

The equation for the first ionization energy of hydrogen is

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Sulphonation of benzoic acid produces mainly

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o-Sulphobenzoic acid

m-sulohobenzoic acid

p-Sulphobenzoic acid

o-and p-Sulphobenzoic acid

In an experiment the concentration of a reactant 'A' is doubled the rate increases four times. If concentration in tripled, then rate increases nint times. Thus the rate is proportional to ______ of concentration of 'A'

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Square root

Square

Twice

Cube

Number of sigma bonds in P₄O₁₀is

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6

7

17

16

Purine derivative among the following bases is

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Thymine

Uracil

Guanine

Cytosine

A pollutant affects

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Human health

Quality of life

Functioning of ecosystem

All of these

Ionization potential increases in moving from left to right in a period

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Because nuclear charge increase

Because atomic size decrease

Both (a) and (b)

Because atomic size increases

The general formula of alkyl halides is

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C_nH_2nX

C_nH_2n-1X

C_nH_2n+1X

C_nH_2n-2X

Acetic acid is also named.

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Methanoic acid

Ethanoic acid

Propanic acid

Butanoic acid

When of the following is isolelectronic with krypton

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Ca⁺⁺

Al⁺⁺⁺

Br^-1

I^-1

The oxidation number of Ni in [Ni(CO)₄] is

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+1

0

+4

-4

Which one of the following statements of glucose and sucrose is incorrect?

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Both are soluble in water

Both are naturally occuring

Both are carbohydrates

Both are disaccharides

Which of the following compounds is explosive in nature?

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Phosphorus trichloride

Nitrogen trichloride

Hyponitrous acid

Nitrosyl chloride

Wohler synthesized first of all the organic compound:

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Carbohydrates

Urea

Aniline

Toluene

An alcohol with molecular formula C_nH_2n+1OH has a chiral carbon atom but does not react with MnO^-₄/H⁺what is the least number of carbon atoms such an alcohol could possess

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5

6

7

8

Number of moles of solute dissolved in 1 Kg of solvent is knowns as

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Molarity

Formality

Molality

Mole fraction

The nitration of benzene takes place when it is heated with a mixture of conc.HNO₃and conc. H₂SO₄at 50°C in ratio of

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1 : 2

1 : 1

1 : 3

2 : 1

The solubility of KCIO₃salt in water is decreased by adding

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NaCIO₃

NaCI

KCIO₄

KCI

The addition of HBr is easiest with

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CH2 = CHCl

CICH = CHCl

CH3 - CH = CH2

(CH3)2 C = CH2

The protection of steel by chrome plating is due to

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Cathodic protection

Anodic protection

Covering of steel surface

Formation of alloy with iron

In a group of periodic table, atomic radii is:

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Remains some.

Increases.

First decreases then increases.

Decreases.

Which set of hybrid orbitals has planar triangular shape

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sp³

sp

sp²

dsp²

The three N - Hσ-bonds are made by

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sp³- s overlap

sp²- s overlap

P - p overlap

sp - overlap

Which salt is used for the treatment of hyperacidity in stomach

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NaCl

KCl

NaHCO₃

Na₂CO₃

Dehydration of ethyl alcohol yields

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Aldehyde

Ketone

Acid

Alkene

The solubility product of Ca(OH)₂is 6.5 x 10^-6. The concentration of OH^-ions is

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1.175 x 10^-2

2.35 x 10^-2

3.25 x 10^-3

3.25 x 10^-4

K_bfor NH₄OH is 1.81 x 10^-5, then K_avalue of its conjugate base is

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1.81 x 10⁺⁵

1.81 x 10^-9

5.5 x 10^-9

5.5 x 10^-10

When electrons revolve in stationary orbits

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There is no change in energy level

They vecome stationary

They are gaining kinetic energy

There is increase in energy

In the ground state of an atom the electron is present

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In the nucleus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

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