Question # 1

Which of the following has linear shape?

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SP

SP²

SP³

None of the above

Which of the following statement regarding catalyst is not true?

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A catalyst remains unchanged in composition and quantity at the end of the reaction

A catalyst can initiate a reaction

A catalyst dose not alter the equilibrium in a reversible reaction

Catalysts are sometimes very specific in respect of reaction

Which has largest first ionization energy?

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Li

Na

K

Rb

Sea weeds are important source of

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Iron

Chlorine

Iodine

Bromine

On heating acetaldehyde with ammonical silver nitrate solution we get

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CH₃OH

Silver acetate

HCHO

Silver mirror

The percentage of oxygen in NaOH is

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40

60

8

10

Number of elements presents in the fifth period of periodic table is

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8

10

18

32

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

Reaction of ethylamine with chloroform in alcoholic KOH producers

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CH₃OH

CH₃NC

C₂H₅NC

C₂H₅CN

The carbon atoms in calcium carbide are held by

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Ionic bonds

2 sigma bonds

2 covalent one co-ordinate bond

2 π and one σ bond

How many kinds of space lattices are possible in a crystal?

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23

7

230

14

Toluene can be oxidized to benzoic acid by

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KMnO₄(alk)

K₂Cr₂O₇(acidic)

Both

None

The osmotic pressure of solution increases if

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Temperature is decreased

Solution constant is increased

Number of solute molecules are increased

Volume is increased

Wt. of 112 ml of oxygen at NTP on liquification would be

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0.32 g

0.64 g

0.16 g

0.96 g

According to MO theory, the species O⁺₂

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Bond order of 2.5

Three unpaired electrons

Diamagnetic character

Stability lower then O₂

Al is more reactive than Fe but Al is less easily corroded than Fe because

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It is a noble metal

oxygen forms a protective reaction easily with water

Iron undergoes reaction easily with water

Fe form mono and divalent ions.

Which one is the property of an ideal solvent?

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Should be expensive

It should react chemically with the solute

Impurities should crystallize along with the solute

Should be safe to use

Which of the following units represents largest amount of energy?

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Calorie

Joule

Erg

Electron vol.

With increasing principle quantum number, the energy difference between adjacent energy levels in H atom

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Decreases

Increases

Remain constant

Decreses for low value of Z and increases for higher value of Z.

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

The number of electrons in the M shell of the element with atomic number 24 is

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24

12

13

8

Which is not a a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

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