Question # 1

Two elements whose electronegativities are 1.2 and 3.0, the formed between them would be

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Ionic

Covalent

Coordinate

Metallic

The reaction is galvanic cell is

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Spontaneous

Non-spontaneous

Acid-base

None of these

Generally the bond formed by metals with non-metals is

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Ionic

Covalent

Polar

Non- polar

Alkyle magnesium halides are known as

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Simon-smith reagent

Tollen's reagent

Grignard's reagent

Barford's reagent

e/m of cathode rays is same but for positive rays e/m changes by changing gas in the discharge tube because

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Cathode rays are small sized particles

Cathode rays have same charge

Nature of cathode rays same for all gasses, but masses of nuclei are different for different gases

Temperature of cathode rays higher

Which structure shows a tertiary alcohol

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CH₃CH₂OH

(CH₃)₂CHOH

(CH₃)₃COH

CH₂OH

Acetic anhydride is obtained form acetyl chloride by the reaction of

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P₂O₅

H₂SO₄

CH₃COONa

CH₃COCH₃

Grignad reagent is reactive due to

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The presence of halogen atom

The presence of Mg atom

The polarity of C - Mg bond

None of above

Which of the following enzymes brings about the hydrolysis of fats?

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Urease

Maltase

Zymase

Lypase

A six membered ring containing one double bond called

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Cyclohexene

Cyclohexane

Cyclohexadiene

None

The value of SHE is cathode and anode is always taken to be

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One

Zero

Different

Same

If a reactant or product of a reaction absorbs radiation, then physical method for determining the rate of reaction is

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Spectrometry

Refractometry

Conductivity measurement

Optical method

Anode is the surface on which probability of finding electron is:

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50%

Less than 10%.

More than 95%.

Zero.

The unit of rate constant K ismole^-1 dm³for a chemical reaction, the order of reaction is :

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Order of reaction can determined by an experiment

Order of reaction can determined from a balance equation only.

Order of reaction can determined increases by increasing temperate.

Order of reaction must be in whole number and not in fraction.

When the degree of freedom increase the entropy ______

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Decreases

Increases

Remains same

All

Treatment of a secondary alcohol with a suitable oxidizing agent (K₂Cr₂O₇) results in the formation of

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Ketone

Aidehyde

Ether

Alkyl halide

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Iodine can oxidise iron

Bromine can oxidise iron

Iodine can oxidise bromine

Iron can oxidise bromine

Which of the following molecules has a net dipole moments

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CO₂

CS₂

SO₂

CCI₄

C- X bond is strong in

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CH₃Cl

CH₃Br

CH₃F

CH₃I

The polymers which can not be re-softened again and again are called

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Thermoplastic

Thermosetting

Both a and b

None

When of the following is isolelectronic with krypton

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Ca⁺⁺

Al⁺⁺⁺

Br^-1

I^-1

Most common oxidation states shownby cerium are

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+2, +4

+3, +4

+3, +5

+2, +3

The temp. and pressure used for PVC polymerization is

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10°C and 10 atm

20°C and 20 atm

52°C and 9 atm

100°C and 10 atm

Linear shape is associated with set of hybrid orbitals?

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sp

sp2

sp3

dsp2

Which of the following fertilizers is useful for paddy rice

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Ammonium nitrate

Ammonium sulphate

Urea

Ammonium chloride

The degree of unsaturation in fats or oils is usually measured by numbers of grams of iodine required by 100 grmas of fat, this is called

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Oil number

Saturation number

Iodine number

Un saturation number

The element with atomic number 26 will be found in group

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2

8

6

10

Which of the following solution have zero pH

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1 M HCI

MH₂SO₄

0.1 M HNO₃

1 M CH₃COOH

Weakest acid among the followings is

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Acetic acid

Phenol

Water

Acetylene

An organic compound has the following properties ; It gives a positive tri-iodomethane test; it gives a yellow ppt, with 2, 4-DNP regent; it does not react with Tollen's reagent . Which compound would give these results

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CH₃CHO

CH₃CH₂OH

CH₃CH₂COCH₃

CH₃CH₂CH₂CHO

In the chemical combination of hydrogen and fluorine to form HF:

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Sodium atom donates major share of its electrons.

Hydrogen atom donates the major share of its electrons.

Both the atoms share the electrons equally.

None of above.

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