Question # 1

Density of aluminium is (g cm^-3):

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B

Al

Si

Ge

Which of the following statements is true about Galvanic cell

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Anode is negatively charged

Reduction occurs at anode

Cathode is positively charge

Reduction occurs at cathode

Which of the following has magnesium?

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Carbonic anhydrase

Haemocyanin

chlorophyll

Vitamin B₁₂

Which metal is used for catalytic hydrogenation of oils

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Cu

Pt

Ni

Pd

CsF is an ionic compound because:

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High I.P of Cs and high E.A of F.

High I.P of Cs and low E.A of F.

Low I.P of Cs and high E.A of F.

Low I.P of Cs and low E.A of F.

Which alcohol gives only one oxidation product when wormed with dil acidified K₂Cr₂O₇

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Butan-1-ol

Butan-2-ol

2-methyl propan-1-ol

2-methyl propan-2-ol

Which of the following does not react with phenyl hydrazine?

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Ethanol

Ethanal

Acetone

Acetophenone

The hydrocarbon which is used as an illuminating agent

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Methane

Methene

Methyne

B & C

In its reaction with Na, 1 mol of X gives 1 mol of H_2(g). What is X

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CH₃CH₂CH₂CH₂OH

(CH₃)₃COH

CH₃CH₂CH₂CO₂H

CH₃CH(OH)CO₂H

Which one of the following compounds does not have the empirical formula CH₂O?

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Ethanoic acid, CH₃CO₂H

Ethanol, CH₃CH₂OH

Glucose, C₆H₁₂O₆

Methanal, HCHO

Amino acids are bifunctional organic compounds what are the two function groups

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Carboxylic acid and alcohol

Alcohol and aldehyde

Carboxylic acids and ketone

Amino group and carboxylic acid

The apex angle of the folded filter paper is slightly greater than :

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60°

30°

45°

90°

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

Sulphuric acid generates nitronium ion by reacting with

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Nitric acid

Nitrogen gas

Nitrous acid

Potassium nitrate

SN₂reactions can be best carried out with:

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Prl. alkyl halide

Sec. Alkyl halide

Ter. Alkyl halide

All of three

Complex protein molecules which catalyses the organic reactions in the living cells are called

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Living organisms

Enzymes

Viruses

Bacteria

How many moles of oxygen, O₂are needed for the complete combustion of two moles of butane C₄H₁₀?

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2

8

10

13

Which reagent will distinguish a ketone from an aldehyde

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Br₂

2, 4-dinitrophenylhydrazine

NaBH₄

Tollen's reagent

The rules which describe the distribution of electron in atomic energy levels are Auf-ban principle, Pauli's exclusion principle. Hunds rule. The pauli exclusion principle refers to the

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Orientation of orbital in space

Fact that two electrons in the same orbital should have opposite spins

Energy of the orbital

Spin of the electron

The elements in which d or f-orbitals are incomplete are called

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Transition elements

Typical elements

Actinides

lanthanides

The electron affinity of chlorine may be represented by the equation

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The phenomenon of isotropy was first discovered by

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Soddy

Rutherford

Bohr

Dalton

The colour of transition metal complexes is due to

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d-d transitions of electrons

Para magnetic nature of transition elements

Ionization

Loss of s-electrons

Solubility of KMnO₄at higher temperature is:

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5%

7%

15%

25%

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

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Fullerences

Freons

Polyhalogens

Ferrocene

The number of unpaired electrons in Mn²⁺is

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5

4

3

2

Cracking done at low pressure and with a catalyst is called _______ cracking

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Thermal

Catalytic

Steam

None of them

With amino acids ninhydrin solution gives

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Blue

Violet

Bluish violet

White

Naturally occurring lipids are called

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Fats

protein

Steroids

None

The four quantum numbers of the valency electron of potassium are

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4,1,1,1/2

4,0,0,1/2

4,1,0,1/2

4,4,0,1/2

Which compound shows hydrogen bonding

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C₂H₆

C₂H₅CI

CH₃- O - CH₃

C₂H₅OH

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