Question # 1

The presence of a double bond in a compound is the sign of

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Saturation

Unsaturation

Substitution

None of above

Reaction of Grignard's reagent with ketones gives: Reaction of Grignard's reagent with formaldehyde gives:

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Pri-alcohol

Sec-Alcohol

Ter-alcohol

Carboxylic

All 3d series elements show variable oxidation states. The one shown by all 3d elements is

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+2

+3

+4

+5

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

The electron affinity of chlorine may be represented by the equation

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The human body can synthesize ______ amino acids

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1

10

20

19

How many alcohol (including both structural isomers and stereoisomers) can have the molecular formula C₄H₁₀O

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3

4

5

6

Where energy is released during a reaction it is

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Exothermic reaction

Endothermic reaction

A free radical reaction

A bond breaking reaction

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

Common names of aldehydes are given by corresponding:

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Ketone

Alcohol

Carboxylic acid

ester

The relative lowering of vapour pressure is equal to the mole fraction of the solute is statement of

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Rault law

Henry law

Dalton law

Grahms law

In the atmosphere, CO₂is about

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0.01%

0.03%

0.05%

0.09%

The total number of rare earth elements is

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8

32

14

10

The wave number of the line emitted is 109.678 x 10⁵m^-1in the Lyman series when electron transition occurs

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Protein are classified into

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Simple protein

Complex protein

Derived proteins

All of these

The correct relation b/wK_{c and}K_{p is :}

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K_p = K_c[P/N] ^Δn

K_{c =}K_p(RT) ^Δn

K_{p =}K_c(RT) ^Δn

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Acidified AgNO_3(aq)

Fehling's solution

Na

Na₂XO_3(aq)

Ionization energies increase from left to right along the period due to

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Increase in nuclear charge

Repulsion of electron increases

Repulsion of protons increase

Atomic size increase along the period

If a salt bridge is removed between the two half cells, the voltage

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Drops to zero

Does not change

Increases gradually

Increases rapidly

Which carbohydrates is an essential constituent of plant cells?

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Starch

Cellulose

Sucrose

Vitamins

Which of the following solution has the highest boiling point

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5.85% solution of sodium chloride

18.0% solution of glucose

6.0% solution of urea

All have the same boiling point

Etherification is catalyzed by

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Acids

Gases

Salts

None of the these

The valence shell of hydrogen is half filled like those of

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IV - A

VIA

V - A

VIIA

The forced which holds together two or more atoms or ions to form a large variety of compounds in called:

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A chemical bond.

An ionic bond.

A covalent bond.

A coordinate bond.

Glass calorimeter reaction is one which we measure

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Enthalpy of combustion

Enthalpy of reaction

Pressure volume work

None of above

Mustard gas is a

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Gas

High boiling speed

High melting liquid

Steam

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

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Ag⁺

Cu²⁺

Al³⁺

Si⁴⁺

How many g of dibasic acid (mol. wt. 200) should be present in 100 ml of the aqueous solution to give 0.1 Normality?

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1 g

2 g

10 g

20 g

Molarity of pure water is :

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33.3

55.5

44.4

66.6

Which of the following has highest oxidation potential

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Be

Li

Na

Ca

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