Question # 1

Decomposition of H2O is

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Endothermic reaction

Nuclear reaction

Exothermic reaction

Zero nuclear reaction

Which of the following acid is unsaturated carboxylie acid

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Malonic acid

Oxalic acid

Succinic acid

Maleic acid

Energy required to remove electron from an atom

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Ionization potential

Electronegativity

Electropositivity

Electron affinity

The angle between the unhybridized 2pz orbital and the three sp2 hybrid orbitals in ethene is

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180°

120°

90°

60°

The trade name of polytereafluoroethylene (PTFE) is

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Teflon

PVC

terelene

polyester

Nucleic acid contain elements like N,H,O,C and

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Ca

S

P

F

Which of the following is not the required condition for the formation of smog

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Sufficient NO

Sunlight

Less movement of air

Winds

Transformation is a cyclic process in which used plactic is

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Remelted and styrene is added

Converted into low quality substance

Converted back into original components

None of these

The normal amount of overhead ozone is

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350 DU

450 DU

400 DU

300 DU

Lind's ,method for liquefaction of gases is based on the principle of:

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Graham's law of diffusion

Joule Thomson effect

Avogadro's hypothesis

Dalton's law of partial pressure

The region of earth capable of supporting life is

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

Sodium hexametaphophate is known as

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Calgon

Permutite

Natalite

Nitrolim

Electronic configuration of Cu⁺²is

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4S², 3d⁹

4s^-1, 3d¹⁰

4S⁰, 3d⁹

None of these

Le-chatlier's principle is applied on the reversible reaction in order to

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Determine the rate of reaction

Predict the direction of reaction

Determine the extent of reaction

Find best conditions for favorable shifting the position of equilibrium

The value of K_pis greater than K_cfor a gaseous reaction when

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Number of molecules of products is greater than the reactants

Number of molecules of reactants is greater than those of products

Number of molecules of reactants and products equal

Catalyst is added

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

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Ag⁺

Cu²⁺

Al³⁺

Si⁴⁺

Alkyl halides are considered to be very reactive compounds towards nucleophiles because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bad leaving group

They have a nucleophilic carbon and a good leaving group

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

What is the molarity of the solution that contains 20 grams of NaOH in 500 ml of solution [Na = 23, O = 16, H = 1]

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0.25

0.5

1

20

The four bonds of carbon in methane are directed towards the corners of

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Cube

Pentagon

Hexagon

Tetrahedron

The total number of inner transition elements in the periodic table is

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10

14

28

30

The OH group present in acids may be replaced by CI atom on treatment with

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PCI₅

SOCI₂

Both of them

None of the above

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