Question # 1

All are dicarboxylic acids except

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Oxalic acid

Malonic acid

Picric acid

Tartaric acid

The enzyme which is found in saliva, accelerates the conversion of starch into sugar is

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Pepsin

Thrombin

Ptyalin

Fumarase

The word paper is derived from the name of which reedy plant

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rose

sun flower

papyrus

water hyacinth

No of unpaired electrons are maximum in

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V+3

Mn+2

Fe+3

Cr+3

By increasing temperature,the transition from a gas to an ionized gas gives free electrons called:

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UV radiation

gas phase

plasma

vapour density

Two substances that have the same crystal structure are said to be

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isomorphous

anisotropic

isotropic

polymorphous

The development of industries was a direct result of which major factor

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population

living standards

depletion of resources

all of these

Ethene C₂H₄and N₂gases diffuse at the same rate at room temperature. it is due to the reason

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these are non polar gases

their molecular masses are same

both are covalent molecules

both have multiple bonds

First order of protein structure refers to

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Bending of protein chain

Number and sequence of amino acids

Three dimensional structure of protein

Site of disulfide bonds

The elements of group I-A react violently with water and make the solution

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neutral

amphoteric

acidic

alkaline

Which one is not postulated in the kinetci molecular theory among the following?

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molecules are in chaotic motion

molecules of all the gases have same size and same mass

the volume of the molecules is negligible

all molecular collisions are elastic

Which one of the following is not air pollutant gas

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CO

CO₂

NO

SO₂

N₂3H₂⇌ 2NH₃

_{Which of the following change will favorthe formation of more}NH₃at equilibrium in above reaction :

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By adding NH_3.

By removingH_2.

By decreasing pressure.

By increasing pressure.

The homologous series of aldehydes and ketones have general formula:

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C_nH_2nO

C_nH_nO

C_nH_2n-1O

C_nH_nO_n

The wave number of light emitted by a certain source is 2 x 10⁵m. The wavelength of this light will be:

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500 NM.

500 M.

200 NM.

5 x 10⁷m

Which of the following acts as ligand

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NH₃

NH₂-- CH₂-- CH₂-- NH₂

C₂O^2-₄

All these

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

Chromyl chloride and toluene react to produce

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p-chlorotoluene

Benzaldehyde

Benzyl chloride

Bezoic acid

The radius of first orbit of hydrogen atom

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0.329 A°

0.429 A°

0.529 A°

0.229 A°

Na reacts with phenol to produce

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H₂gas

Benzene

CO₂gas

CO gas

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

Chromatography is derived from Greek word 'Khromatos' means:

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Type writting

Printing

Color writing

Writing

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