Question # 1

When propanamide reacts with Br₂and NaOH then which of the following compounds is formed?

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Ethyl alcohol

Propyl alcohol

Propyl amine

Ethylamine

Formic acid is obtained when

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Calcium acetate is heated with conc.H₂SO₄

Calcium formate is heated with calcium acetate

Glycerol is heated with oxalic acid

Acetaldehyde is oxidized with K₂Cr₂O₇and H₂SO₄

One calorie is equal to

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5.184 J

3.184 J

4.184 J

7.184 J

Which of the following is not fatty acid?

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

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Forward

Backward

Already in equilibrium

K_cis never less

The Mn³⁺has ______ color

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Violet

Green

Red/brown

No color

The order of reactivity for a given halogen in Grignard's reagent is:

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CH₃X > C₂H₅X > C₃H₄X > C₄H₄X

C₂H₅X > C₃H₇X > C₄H₅X > CH₄X

C₃H₇X > C₄H₇X > CH₃X > C₂H₅X

C₄H₄X > C₃H₇X > C₂H₅X > CH₄X

Sulphuric acid reacts with PCl₅to give

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Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

The total number of transition elements is:

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10

14

40

50

Which of the following statements is not true?

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Isotopes with even atomic masses are comparatively abundant

Isotopes with even atomic masses and even atomic numbers are comparatively abundant

Isotopes with even atomic masses and odd atomic number are comparatively abundant

Ionization potential increases in moving from left to right in a period

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Because nuclear charge increase

Because atomic size decrease

Both (a) and (b)

Because atomic size increases

pKb value of NH₄OH is 4.74. If the concentration of NH₄OH is 1 molar containing 0.1 molar NH₄Cl, then pH of this buffer will be

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3.74

10.26

4.74

9.26

As compared to molar solution, in the molal solution the quantity of solvent is :

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Comparatively lesser

More or less equal

Comparatively greater

Very large

Reduction of alkyl halides give

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Alkanes

Alkenes

Ketones

Ether

Toluene can be oxidized to benzoic acid by

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KMnO₄(alk)

K₂Cr₂O₇(acidic)

Both

None

Isotopes of an element differ in

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Number of protons

Number of electrons

Number of neutrons

Number of electrons and protons

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Zero

253 sec

150 sec

500 sec

In electrolysis of NaCl when Pt electrode is taken then H₂is liberated at cathode while with Hg cathode it forms sodium amalgam

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Hg is more inert than Pt

More voltage is required to deduce H⁺at Hg than Pt

Na is dissolved in Hg while it does not dissolve in Pt

Conc. of H⁺ions is larger when Pt electrode is taken

The nature of positive rays depend on:

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Nature of discharge tube.

Nature of resident gas.

Nature of electrode.

All of above.

Formaline Contains ______% alcohol

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80

37

8

52

To determine the rate of reaction chemically a graphical method is applied. A graph is plotted between the amount or reactant decomposed or product formed against the time. The rate d_x/d_tat any time is equal to

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k

Tangentθ

1/a, a is initial conc.

1/a²

(CH₂O)_nis general formula for

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Monosaccharides

Oiligosaccharides

Polysaccharides

None of these

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4-methyl pentene

2-methyle-1-butene

2-methyl propane

None of the above

The degree of polarity of molecule is known as its

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Dipole moment

Moment arm

Bond energy

Ionic character

Which of the following fibres are made of polyamides?

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Dacron

Orlon

Nylon

Rayon

Bell metal is an alloy of Sn and

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Copper

Iron

Zinc

Magnesium

Noble gases have the electronic configuration with their valance shell ns²np⁶except one

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He

Ne

Kr

Xe

In the atmosphere, CO₂is about

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0.01%

0.03%

0.05%

0.09%

Units of molarity are

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gm/lit

mol/lit

kg/lit

None of these

Which of the following is a molecular diseases?

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Allergy

Cancer

German measles

Sickle cell anemia

Sodium is never found free in nature because of its

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Chemical reactivity

Small ionic size

Small atomic volume

None of these

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