Question # 1

What is the molarity of the solution that contains 20 grams of NaOH in 500 ml of solution [Na = 23, O = 16, H = 1]

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0.25

0.5

1

20

Alkanes containing carbon C₁₈ownwards are

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Gases

Liquids

Waxy solids

Solids

Transition metals form complexes due to the participation of partially filled

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f-orbitals

d-orbitals

s-orbitals

p-orbitals

The OH group present in acids may be replaced by CI atom on treatment with

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PCI₅

SOCI₂

Both of them

None of the above

Compounds X, Y and Z, all react with PCI₅to release hydrogen chloride, but only one of them reacts eith 2,4-dinitrophenylhydrazine reagent. Which one of the following combinations could be X, Y and Z

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The group linkage present in fats is

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Peptide linkage

Ester linkage

Glycosidic linkage

None of these

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Primary alkyl halide

Secondary alkyl halide

Tertiary alkyl halide

None of these

A bond between two atoms may be obtained by sharing of electrons such a bond is called

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An ionic bond

A coordinate bond

A dative bond

A covalent bond

Polymerization of ethane take place at pressure of 100 atm and a temperature of

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200°C

400°C

600°C

800°C

Which is in differnet phase form other metals

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Ni

Hg

Cd

Na

Which statement is not true. A solution is a homogeneous mixture of

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Two ionic substance like NaCl and HCl

Two molecular substances sugar and water

A solute and a solvent 1% NaHCO₃in water

NaCl and sand

Calculate the amount of charge flowing in 2 minute in a wire of resistance 10Ωwhen a potential difference of 20 V is applied

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120 C

240 C

20 C

4 C

Rutherford's planetary like picture of the atomic modal was defective because

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It did not describe the quantity of positive charge

It did not explain the repulsion of protons within the nucleus

No empty space between nucleus and the electrons

Moving electron should radiate energy

The rate of reaction :

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Remain same as reaction proceeds.

May decrease or increase as reaction proceeds .

Increase as reaction proceeds.

Decreases as reaction proceeds.

The proteins which are derived by conjugated proteins are called as

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Simple protein

Complex protein

Derived protein

None

In zero order reaction, the rate is independent of :

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Temperature of reaction

Concentration ofreactants

Concentration of products

None of these.

On heating acetaldehyde with ammonical silver nitrate solution, we get

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CH₃OH

Silver acetate

HCHO

Silver mirror

Which is not carboxylic acid with pungent smell?

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Formic acid

Acetic acid

Ethanoic acid

Butyric acid

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Forward reaction is favoured

Backward reaction is favoured

No effect

None of the above

Which is not a fossil fuel

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Petroleum

Coal

Natural gas

None of them

Thre rate of S_N2 reaction depends upon the

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Concentration of alkyl halides

Concentration of nucleophile

Concentration of alkyl halides and nucleophile

None of the above

When the electron jumps form second third, fourth orbit to the fist orbit, the transitions are known as

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Balmer series

Lyman series

Pfund series

Brackett series

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HF is stable and does not decompose even at 2000°C

HF is stable and slowly decomposes at 2000°C

HF is strong acid

HF produces equal moles of hydrogen and fluorine

The molar boiling point constant is the ration of elevation in boiling point to :

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Molarity

Mole fraction of solvent

Mole fraction of solute.

According to Mendleev, the physical and the chemical properties are the periodic function of their

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Atomic number

Atomic mass

Atomic wt

None

The electron affinity of chlorine may be represented by the equation

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Platinum (IV) chloride combines with ammonia to form compounds in which the coordination number of the platinum is 6. A formula unit on one of the compound contains a cation and only two chloride ions. What is the formula of this compound

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Pt(NH₃)₆CI₄

Pt(NH₃)₅CI₄

Pt(NH₃)₄CI₄

Pt(NH₃)₃CI₄

In t-butyl alcohol, the tertiary carbon is bonded to:

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Two hydrogen atom

Three hydrogen atoms

One hydrogen atoms

No hydrogen atoms

Which is used for the reduction of aldehydes and ketones

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NaBH₄

Pt/Pd

Ni

All of these

Alkenes combine readily with electrophillic reagents such as halogens giving

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Haloalkanes

Gem-dihalides

Vicinal dihalides

Vinyl halides

The pH of 10^-3mole dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

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