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NEET CHEMISTRY > HYDROGEN > Flashcards

HYDROGEN Flashcards

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1
Q

hydrogen has properties similar to …….&…….

A

akali metals halogens

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2
Q

Electronic congiguration of hydrogen

A

1s2

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3
Q

resemblance of hydrogen with group 1 elements

A

forms +ve univalent ion

has one electron in outermost shell

forms stable oxides , sulphides and halides

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4
Q

difference between hydrogen and group 1 metals

A

Ionization enthalpy of hydrogen is higher than that of the other group one elements

hydrogen ion is way smaller than the ions of other group 1 metals and it is always associated with other atoms or molecules

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5
Q

similarity of hydrogen with halogens

A

gains an electron to attain nobel gas configuration

forms hydrides with carbon just like how halogen forms halides with carbon

similar ionization enthalpy

molecular forms are diatomic

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6
Q

differnce between hydrogen and halogens

A

hydrogen is less reactive

electron affinity of hydrogen is lesser

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7
Q

name the isotopes of hydrogen

A

protium (1H1)

deuterium (1H2)

tritium (1H3)

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8
Q

heavy hydrogen is

A

deuterium

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9
Q

which isotope of hydrogen is radioactive and what particles does it emmit

A

tritium

beta particles

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10
Q

abundance of of the isotopes of hydrogen (order)

A

P > D > T

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11
Q

Mass of hydrogen isotopes (order)

A

T>D>P

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12
Q

MP of isotopes of hydrogen (order)

A

T>D>P

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13
Q

BP of isotopes of hydrogen(order)

A

T>D>P

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14
Q

enthalpy of bond dissociation of isotopes of hydrogen(order)

A

T>D>P

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15
Q

Why is impure zinc not used to form dihydrogen

A

it reacts very slow

therefor impurities are added

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16
Q

why isnt zinc reacted with concentrated H2SO4 for dihydrogen formation

A

forms SO2 instead of dihydrogen

therefor dilute h2so4 is used

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17
Q

what electrodes are used in electrolysis of acidic water to form dihydrogen

A

platinum electrodes

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18
Q

what electrodes are used in electrolysis of barium hydroxide to form dihydrogen

A

nickle

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19
Q

what is brine

A

aqueous NaCl

20
Q

during electrolysis of Brine what gas is released at the cathode

A

H2

21
Q

during elctrolysis of Brine what gas is released at the anode

A

Cl2

22
Q

what are the products when Zn reacts with NaOH

A

Sodium zincate (Na2ZnO2) and dihydrogen

23
Q

formation of dihydrogen from carbon and water is catalysed by ……….. at ……….. kelvin

A

nickle

1270 K

24
Q

what is water gas

A

mixture of CO and H2

25
Q

Wter gas AKA

A

synthesis gas

Syn gas

26
Q

production of syn gas from coal is called

A

coal gasification

27
Q

it is difficult to obtain dihydrogen from water gas

therefor what is done

A

CO of water gas is reacted with steam

28
Q

reaction of CO and steam is catalyzed by what at what temperature

A

Iron chromate (FeCrO4)

673 K

29
Q

physical properties of hydrogen

A

oudourless

colourless

combustible

tasteless

30
Q

comment on the solubility of dihydrogen in water

A

insoluble

31
Q

reaction of hydrogen and chlorine is aided by

A

sunlight

32
Q

reaction of hydrogen and bromine is aided by

A

heat (673 K )

33
Q

reaction of hydrogen and iodine is aided by

A

catalyst platinum and heat (673 K )

34
Q

Hydrogen reacts with

oxygen

nitrogen

metals

TO FORM

A

water

ammonia

metal hydride

35
Q

addition of hydrogen to unsaturated hydrocarbons is catalyzed by what at what temperature

A

Ni

473 K

36
Q

vegetable oil on addition of Hydrogen gets converted into

A

solid fat

37
Q

hydrogenation of vegetable oil catalyzed by what at what temperature

A

Ni

473 K

38
Q

olefins + dihydrogen + corbone monoxide =

A

aldehyde

39
Q

addition of dihydrogen to aldehyde forms

A

alcohol

40
Q

aldehyde to alcohol by dihydrogen is catalyzed by

A

platinum

41
Q

production of NH3 from N2 and H2 is catalyzed by what at what conditions

A

Fe

200 Atm

673 K

42
Q

production of methyl alcohol from CO and H2 is catalyzed by

A

cobalt

43
Q

name the type of hydrides

A

ionic hydride

covalent hydride

metallic hydride

44
Q

ionic hydriges are formed with every s-block element except

A

Be , Li , Mg

45
Q
A

NEET CHEMISTRY (1 decks)

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