Question # 1

The oxidation state of carbon in C2O-²4 is

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+4

-4

+3

+2

Succinic thiokinase is an enzyme of the type

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mutase

peroxidase

ligase

lyase

The molar volume of CO₂ is maximum at:

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S.T.P. (0^∘C and 1 atm)

127^∘C and 1 atm

0^∘C and 2 atm

273^∘C 2atm

What forces operate between ethyl group of ethyl alcohol and oxygen of water

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H-bonding

attractive forces

repulsive forces

dipole forces

Which of the following transition metal forms colourless compounds in +4 oxidation state?

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Ti

Cr

Cu

Zn

Which solids are called true solids

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Crystalline

Vitreous

Amorphous

Metallic

Which is the following is true about galvanic cell:

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Reduction occurs at cathode

Reduction occurs at anode

Anode is negatively charged

Chathode is positively charged

The morality of the solution containing x grams ammonium sulfate in 500cm3 of the solution is 0.6 what is x?

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39.6

40.5

42.7

45.1

Rte of evaporation of petrol is greater than that of water at room temperature. This is due to the reason that:

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petrol is an organic compound

water molecules have small size

petrol molecules do not have

petrol molecules have greater size

Slight oxidation of primary alcohol eives

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Ketone

Aldehyde

-Organic acid

An ester

One mole of a gas refers to

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The number of molecules in one litre of gas

The number of molecules in one gram of gas

The number of molecules contained in 12 grams of ¹²C isotope

The number of molecules in 22.4 liters of a gas at S.T.P.

In a group the atomic size increase downward due to

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Addition of electronic shells

Increase in the proton number

Repulsion of electrons

All of the above

Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?

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Chlorination, nitration, reducing

Nitration, chlorination, reducition

Nitration, reduction,chlorination

Nitration, reduction, acylation, chlorination, hydrolysis

Rutherford's planetary like picture of the atomic modal was defective because

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It did not describe the quantity of positive charge

It did not explain the repulsion of protons within the nucleus

No empty space between nucleus and the electrons

Moving electron should radiate energy

For principle quantum number n=4, the total number of orbitals having l = 3 is

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3

7

5

9

Synthesis rubber is made by polymerization :

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Chloroform

Acetylene

Divinyl acetylene

Butene

Which carbon is more electronegative?

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sp³- hybridized carbon

sp-hybridized carbon

sp²-hybridized carbon

always same irrespective of its hybrid state

Hydrolysis of Grignard's reagent gives:

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Alkane

Alkyl

Halide

Alcohol

The temperature in the incineration process has a range:

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900°Cto 1000°C

650 to 1100°C

950°C to 1300°C

500°C to 900°C

When H₂and I₂are mixed and equilibrium is attained, then

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Amount of HI formed is equal to the amount of H₂dissociated

HI dissociation stops

The reaction stops completely

None of these

Estimation of Na in sea water is an example of :

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Numerical analysis.

Qualitative analysis.

Quantitative analysis.

None of above.

Best medhod of preparation of alkyl halide from alcohals is by its reaction with:

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HX

SOCl₂

Px₅ and PX₃

All

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