Question # 1

The reaction which is zero order

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Decomposition ofN2O5

Formation of Glucose in plant

Formation of Fel2

Chorination of methane in sunlight

When a compressed gas is allowed to pass through a nozzle of a jet into a region of low pressure, it produces

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cooling

vaporization

fusion

expansion

Which of following is primary pollutants

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N₂O

PAN

H₂SO₄

None of these

The boiling points of the halogens

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increases down the group

decreases down the group

remains constant

can not be predicted

The system in which two out of three axes are of equal length and angles are all 90°

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cubic system

hexagonal system

trigonal system

tetragonal system

The 95.5% mass of Lithoshone is made of 11 elements i,e O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. Which element is present in trace amount

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iodine

bromine

lead

carbon

The force which hold the atoms together to form a compound is called:

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Dispersion forces

London forces

A chemical bond

Ven der wall's forces

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

If similar groups are attached to the same side, of C=C of alkene then it is

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Cis isomer

Trans isomer

Tautomer

AIl

The pH range of the acid rain is

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7 - 6.5

6.5 - 6

6 - 5.6

Less than 5

A large hole in the ozone layer over antarctica region was discovered in:

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1960s

1970s

1980s

1990s

A peptide having molecular mass upto 10,000 is called a

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Vitamin

Protein

Polypeptide

Dipetide

Wohler synthesized first of all the organic compound:

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Carbohydrates

Urea

Aniline

Toluene

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Initial concentration of acetic acid

Initial concentration of ethyl acetate

Equilibrium concentration of acetic acid

Equilibrium concentration of ethyl acetate

Iodoethane reacts with sodium in ether, the product formed is

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Pentene

Propyne

Butene

Butane

Electron affinity depends on

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Atomic size

Nuclear charge

Atomic number

Atomic size and nuclear charge both

Which of the followings is not a nulceophile

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OH^-

NH₃

C₂H₅O^-

Br₂

Which of the hydrogen halides has the highest percentage of character?

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HCl

HBr

HF

Hl

Which three elements are needed for the healthy growth of plants

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N, S, P

N, Ca, P

N, P, K

N, K, C

The process in which solvent particles surround solute particles is called

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Hydrolysis

Hydration

Solvation

Dissolution

Solvent extraction is an unstable,Process and it is controlled by:

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Alcohol extraction

Petrol extraction

Phenol extraction

Ether extraction

Which of the following sets of atomic numbers belong to that of the alkali metals?

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1,12,30,4,62

37,19,3,55

9,17,35,53

12,20,56,88

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