Question # 1

The essential component of organic compound is

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O

C

P

N

What is the total number of different chloroethanes, formula C₂H_6-nCl_n, where n can be any integer from 1 to 4

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4

6

7

8

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Treatment with HCN followed by acid hydrolysis

Oxidation of acetaldehyde followed by basic hydrolysis

Treatment with HCN followed by reduction

Treatment with HCN followed by oxidation

Which polymerization is free radical machanism based

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Addition

Condensation

Both a and b

None

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0 dm³

3 dm³

2 dm³

3 dm³

Pollution is

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Removal of top soill

Release of toxic/undesirable materials in enevironment

Conversation of energy

All the above

Which set of hybrid orbitals has planar triangular shape

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sp³

sp

sp²

dsp²

e/m of cathode rays is same but for positive rays e/m changes by changing gas in the discharge tube because

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Cathode rays are small sized particles

Cathode rays have same charge

Nature of cathode rays same for all gasses, but masses of nuclei are different for different gases

Temperature of cathode rays higher

According to the SI-system heat contents are measured in units of

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Calorie

Joules

Ergs

Watts

The carbon, carbon bond length in benzene is

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1.54A°

1.34A°

1.20A°

1.39A°

Air pollution is not caused by

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Pollen grains

Hydroelectric power

Industries

Automobiles

The reaction is galvanic cell is

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Spontaneous

Non-spontaneous

Acid-base

None of these

Activity of the enzyme is reduced by

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Temperature

Concentration

pH

Inhibitors

For which system does the equilibrium constant, KC has units of concentration

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An organic compound 'A' has the molecular formula C₃H₆O, it undergoes iodoform test. When saturated with HCl it gives 'B' of molecular formula C₉H₁₄O. A and B, respectively are

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Propanal and mesitylene

Propanone and mesityl oxide

Propanone and 2, 6-dimethyl-2,5-heptadien-4-one

Propanone and mesitylene oxide

Macro-nutrients are required in quantities ranging from

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5 kg - 200 kg

2 kg - 100 kg

1 kg - 50 kg

10 kg - 100 kg

What is the structure of the ester formed from propanoic acid and ethanol

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The ore CaSO₄2H₂O has the general name

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Gypsum

Dolomite

Calcite

Epsom salt

The solutions of NaCl and KCl are prepared separately by dissolving same amount of solute in water, which of the following statements is true fro these solutions ?

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KCl solution will have higher boiling point than NaCl solution.

Both the solutions have same boiling points.

KCl and NaCl solutions possess same vapour pressure.

KCl solution possesses lower freezing point than NaCl solution.

Outer shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be

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XY

X₂Y

X₂Y₃

XY₂

Marsh gas was the name given to

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Methane

Ethane

Propane

Butane

The C-C bond angles in benzene ring are

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119°

120°

121°

None

The apex angle of the folded filter paper is slightly greater is termed as:

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60 degree

30 degree

45 degree

90 degree

The three alternate single and double bonds in the benzene ring are called

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Conjugate bonds

Resonating bonds

Both A and B

None of above

The trade name of polytetrafluoroethylene (PTFE) is

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Teflon

PVC

Terelene

Polyester

Phenol is also known as

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Acetic acid

Carbolic acid

Tararic acid

Trichloroacetic acid

Rectified spirit contains alcohol about:

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80%

85%

90%

95%

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Measuring pH

Measuring density

Titration against standard NaOH

Titration against standard KMnO₄solution

Which of the following substances is used as an antiknock compound?

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Tetraethyl lead

Lead tetrachloride

Lead acetate

Ethyle acetate

Which one of the following particles has amass 1/1836 time, that of hydrogen?

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Neutron.

Proton.

Electron.

Positron.

According to MO Theory, the species O₂+ possesses

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bond order of 2.5

three unpaired

diamagnetic character

stability lower then O₂

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