Question # 1

Which of the element is not alkali metal

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Lithium

Rubidium

Francium

Magnesium

The standard e.m.f. of a galvanic cell involving cell reaction with n = 2 is found to be 0.2965 V at 25°C. The equilibrium constant of the reaction would be

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1.0 x 10¹⁰

2.0 x 10¹¹

4.0 x 10¹²

1.0 x 10²

Determination of atomic masses and invention of system of writing symbols was made by:

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J. Berzelius

Democritus

Dalton

None of above

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Shift reaction toward forward direction

Shift reaction backward

Lower the value of K_c

No change in reaction

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Treatment with HCN followed by acid hydrolysis

Oxidation of acetaldehyde followed by basic hydrolysis

Treatment with HCN followed by reduction

Treatment with HCN followed by oxidation

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0.5

4.0

2.5

0.25

Which of the following decolorized Br₂-water

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Methane

Ethane

Ethene

Propane

Cyclone collector is used for minimizing

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Radioactive pollution

Air pollution

Noise pollution

Water pollution

A salt producing hydrocarbon among these compounds is

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Ehyne

Ethene

Methane

Ethane

A cell in which electric current is produced as a result spontaneous redox reaction is called :

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Dry cell

Electrolytic cell

Galvanic cell

Standard cell

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Cu

H

N

O

German silver does not contain

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Cu

Zn

Ni

Mn

How many secondary alcoholic groups are present in the structure of glucose OHC CHOH CHOHCH OH CHOH CH₂OH

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1

2

3

4

Solution which distill without change in composition or temperature are called

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Amorphous

Azeotropic mixture

Ideal

Super saturated

Identify the compound formed, when ethylene combines with water in the presence of 10% sulphuric acid and HgSO₄as catalyst

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Carbinol

Methanol

Ethanol

Glycol

Lead accumulator stops discharging current when

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Lead at anode converted to PbO₂

PbO₂at cathode converted to Pb

Both electrodes are completely covered with PbSO₄

Both electrodes are completely covered with Pb(OH)₂

Condensation of aldeydes withα-hydrogen gives:

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Acetal

Ketal

Aldol

Cannizzaro product

Phenol is also known as

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Acetic acid

Carbolic acid

Tararic acid

Trichloroacetic acid

The correct order of reactivity of halogens with alkanes is

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l₂> Br₂> Cl₂> F₂

l₂> Cl₂> F₂> Br₂

F₂> Cl₂> l₂> Br₂

F₂> Cl₂> Br₂> l₂

Coordinate covalent bond is present in the molecules

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H₂O

BF₃

SiO₂

SO₂

1, 3-Dibromopropane reacts with metallic zinc to form

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Propene

Propane

Cyclopropane

Hexane

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Plank's equations

de Broglie's equations

Heisenburg's equation

None

Aldehydes and ketones are carbonyl compounds. Which of them react both with NaBH₄and with Tollen's reagent

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Both aldehydes and ketones

Aldehydes only

Ketones only

Neither aldehydes nor ketones

H-bonding is not present in

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Glycerine

Water

Hydrogen sulphide

Hydrogen fluride

The ph of 10-3 mole dm-3 of an aqueous solution of H₂SO₄ is :

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3.0

2.7

2.0

1.5

Which of the following will be good conductor of electricity

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Pure distilled water

Molten NaCl

Dilute solution of glucose

Chloroform

The chemical formula of Epson salt is

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MgSO₄

MgCl₂

MgSO₄. 7H₂O

MgCl₂. 7H₂O

The horizontal rows in the periodic table are called periods. The number of period are

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5

6

7

8

Which is a reagent for Lucas test

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ZnCl₂+ Conc. HCl

Zn

Na

Br

The bond length b/w atoms of hydrogen in the hydrogen molecules is:

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7.54 nm.

0.0754 nm.

0.754 nm.

0.00754 nm.

In sixth period 14 of its transition elements are called

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Lanthanides

Actinides

Radioactive elements

None

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