Question # 1

The value of Plank's constant 'h' is

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6.625 x 10^-34

6.625 x 10^-34J sec

6.625 x 10^-34KJ

6.625 x 10^-34K Cal

Acetone is oxidized with

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Tollen's reagent

Fehling solution

Acidic dichromate solution

Benedicts solution

Hydrolysis of protein by 6M HCl gives peptides and thenα-amino acids. How manyα-amino acids molecules are obtained on the hydrolysis of a tetrapeptide

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2

3

4

5

The oxyacids of phosphorus in which phosphorus has the lowest oxidiation state is

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Hypophosphorus acid

Orthophosphorus acid

Pyrophosphorus acid

Metaphosphorus acid

When H₂and I₂are mixed and equilibrium is attained, then

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Amount of HI formed is equal to the amount of H₂dissociated

HI dissociation stops

The reaction stops completely

None of these

Which causes water pollution?

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Smoke/fly ash

Automobile exhausts

Aeroplnes

2,4-D and pesticides

Which is not true with respect to cathode rays?

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A stream of electrons

Charged particles

Move with speed as that of light

Can be deflected by magnetic fields

Biodegradable pollutant is

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Plastic

Asbestos

Sewage

Mercury

5-d series is in the period :

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4th

5th

6th

7th

The size of electronic shell is described by

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Azimuthal Q. no

Magnetic Q.No

Spin Q. No

Principle Q. No

Alkaline battery has a voltage of

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4.5 V

3.5 V

2.5 V

1.5 V

Which reagent will distinguish a ketone from an aldehyde

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Br₂

2, 4-dinitrophenylhydrazine

NaBH₄

Tollen's reagent

When metallic sodium in ether is heated with ethyl chloride, which alkane is formed

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Propane

Ethane

Iso-butane

N-butane

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White P when boiled with strong solution of caustic soda produces

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Phosphine

Posh acid

Phosphorous acid

None

He Ar and Ne are:

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Mono-atomic molecules

Hetero atomic molecules

Poly-atomic molecules

Diatomic molecules

Chlorobenzene on heating with aqueous NH₃under pressure in the presence of cuprous chloride gives

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Benzamide

Nitrobenzene

Aniline

Chloroaminobenzene

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2, 3-dimethylbutane

2, 3-methylbutane

2-dimethylbutane

Dimethylbutane

(A) is one molar NaCl solution and (b) is 1 molal NaCl solutin :

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A and B are of same strength.

A is more Concentrate than B.

b is more Concentrate than A.

None of above.

The forced which holds together two or more atoms or ions to form a large variety of compounds in called:

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A chemical bond.

An ionic bond.

A covalent bond.

A coordinate bond.

C₂H₅OH can be differentiated from CH₃OH by

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Reaction with HCl

Reaction with NH₃

Iodoform test

Solubility in water

Organic compounds are soluble in all except

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Benzene

Petroleum

Ether

Water

The period table contains elements in vertical column. these vertical column are called

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Groups

Periods

Blocks

Sub group

When potassium metal is exposed to violet light

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Ejection of electrons takes place

Ejection of some potassium atoms occurs

There is no effect

The absorption of electrons takes place

The ionic bonds are

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Unidirectional

Bi-directional

Non-directional

Multi-directional

E₁mechanism is generally shown by

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1° - RX

2° - RX

3° - RX

None of these

In the ground state, an element has 13 electrons in its M shell. The element is

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Copper

Chromium

Nickel

Iron

A compound possessingα-hydrogen atom, in the presence of dilute alkali formsβ-hydroxy aldehyde. This product on heating with dilute acid forms an unsaturated crotonaldehyde. The compound is

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CH₃CHO

CH₃CH₂CHO

CH₂= CH - CHO

HC = C - CHO

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0 dm³

3 dm³

2 dm³

3 dm³

Alkyl halides react with lithium dialkyl copper reagents to give

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Alkenes

Alkyl copper halides

Alkanes

Alkenyl halides

Alcohols are named by replacing 'e' of alkane with:

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al

ene

ol

one

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