Question # 1

Elements in the same family have

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Same atomic number

Molecular wt same

Same chemical properties

Same electronic configuration

The arrangement of subshells in the ascending order of their energy on complete filing of 4f subshell the entering electrons goes to

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5s

5p

5d

5f

All covalent bonds formed between the two atoms are non-polar when

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Covalent bond between two non-metal atoms

Covalent bond between metal and non-metal

Covalent bond between two atoms of same element

Covalent bond between metal atoms

Write the name of following alkene CH₂= CH - CH = CH₂

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1,3 butadiene

Butra -1, 3-diene

Both a & b

None

The function of salt bridge in the galvanic or voltaic cell is to

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Carry out oxidation at anode

To carry out reduction at cathode

Carry out electrolysis

To prevent the net charge accumulation in either of the half cells

Which element does not belong to 4d series

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Y

Zr

Mo

Zn

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4 mole per dm³

2 mole per dm³

0.33 mole per dm³

0.67 mole per dm³

The specific conductance of a 0.1 N KCl solution at 23°C is 0.012 ohm^-1cm^-1. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be

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0.142 cm^-1

0.66 cm^-1

0.916 cm^-1

1.12 cm^-1

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively

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Zinc dust and soda lime

Soda time and zinc dust

Zinc dust and sodium hydroxide

Soda lime and copper

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

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Planar triangle

Pyramidal

Tetrahedral

Square planar

The relative lowering of vapour pressure is equal to the mole fraction of the solute, This law is called

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Henry's law

Raoult's law

Ostwald's law

Arrhenius law

When aqueous NaCl is electrolyzed, which of the following ions get discharged at anode :

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H⁺

Na⁺

OH^-

Cl^-

The reaction between fat and NaOH is called

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Esterification

Hydrogenolysis

Fermentation

Saponification

The chemical formula of Epson salt is

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MgSO₄

MgCl₂

MgSO₄. 7H₂O

MgCl₂. 7H₂O

In azeotropic mixture showing negative deviation form Raoult's law show

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Higher b.p. than either

Lower b.p. than either

No change in b.p.

None of these

β-D-glucose is a monomer for

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Strach

Cellulose

Glycogen

Protein

Metals like Fe, Mg, Al, Cr, Zn have more negative reduction potentials that is whey

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These don't react with steam

These react very slowly with steam to liberate H₂gas

These react rapidly with steam to produce the metallic oxides and liberate H₂gas

These react with cold water violently

Catalyst in the reaction ROH + SOCl₂-------> RCL+SO₂+HCl is:

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ZnCl₂

Pyridine

H₂SO₄

Either

Tryosine was isolated from

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Butter

Cheese

Oils

Fats

Acetone is prepared by

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Oxidation of n-propyl alcohol

Oxidation of acetaldehyde

Pyrolysis of calcium acetate

Pyrolysis of calcium acetate as well as acetic acid

Which isomer of C₅H₁₁OH gives, one dehydration, the greastest number of different alkenes

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Wolf-kishner reduction is used for the reduction of

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Nitro compounds

Carboxylic acids

Carbonyl compounds

Olefins

A fat or oil is characterised for extent of unsaturation by one of the following number, which one

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Rancidity number

Acid number

Iodine number

Saponicfication number

Which if the following has the highest freezing point at one atmosphere

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0.1 M NaCI

0.1 M sugar solution

0.1 M BaCI₂

0.1 M FeCI₂solution

Benzene reacts with ozone and gives

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Glycerin

Glyoxal

Maleic anhydride

Benzoic acid

Which one of the following reactions is not spontaneous

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Carboxylic acids generally exists in cyclic

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Monomers

Dimers

Trimers

Tetrameter

Reaction of ethylamine with chloroform in alcoholic KOH produces

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CH₃OH

CH₃NC

C₂H₅NC

C₂H₅CN

When nitrogen is 5.6 grams in NO₂. then number of moles of NO₂is

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0.5

0.4

0.04

0.05

Which one of the following is a buffer

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HCI + NaCI solution

CH₃COOH + CH₃COONH₄solution

H₂SO₄+ CaSO₄solution

CH₃COOH + CH₃COONa

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