p block Flashcards by Unknown Unknown

Q

oxygen % in earth crust

A

56.6%

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Q

silicon % in crust

A

27.7%

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Q

most abundant metalloid in earth crust is

A

silicon

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Q

most abundant metal in earth’s crust is

A

aluminium

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Q

% of aluminum in earth crust

A

8.3%

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Q

borax is found in

A

puga valley in ladakh, sambhar lake in rajasthan

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Q

borax formula is

A

na2b4o7

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Q

boron %

A

10^-4%

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Q

bauxite formula is

A

al2o3

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Q

order of size of atom in 13 group

A

B<Ga<Al<In<Tl

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Q

order of ionisation enthalpy of group 13

A

B>Tl>Ga>Al>In

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Q

order of electron gain enthalpy of group 13

A

B>AL>GA>IN>TL

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Q

order of boiling point of group 13

A

b>al>ga>in>tl

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Q

order of melting point of group 13

A

b>al>tl>in>ga

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Q

ionisation enthalpy of group 14 is in order

A

c>si>ge>pb>sn

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Q

electron gain enthalpy of group 16

A

s>se>te>o

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Q

electron gain enthalpy of group 18

A

ne>ar=kr>xe>rn>o

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Q

n2o5 is

A

acidic

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Q

no and no2 are

A

neutral

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Q

____ is predominantly acidic

Study These Flashcards

A

GeO

Q

_____ boron reacts with air

Study These Flashcards

A

amorphous

Q

p2o5 is used as

Study These Flashcards

A

dehydrating agent

Q

so2 is a ____ agent

Study These Flashcards

A

reducing

Q

o3 is a _____ agent

Study These Flashcards

A

reducing

stability of oxides of halogens is

I>CL>BR

_____ is used in purification of CO

I2O5

order of melting point of group 15 hydrides

NH3>SBH3>ASH3>PH3

Order of boiling point of group 15 hydrides is

BSNAP

order of basicity of group 15 hydride

NH3>PH3>ASH3>SBH3>BIH3

order of melting point of group 16 hydrides

O>Te>Se>S

order of acidity of group 16 hydrides

H2O

order of reducing character of group 16 hydrides

H2O

order of reducing character of group 15 hydrides

NH3

Order of boiling point of group 17 hydrides

FIBC

Order of melting point of group 17 hydrides

IFBC

which group 13 trihalide is not formed

TlI3

which halide does not undergo hydrolysis

CCl4

SiCl4+ h2o ---->

Si(OH)4 silicic acid

bif3 is _____ (ionic/covalent)

covalent

pbf4 is _____(ionic/covalent)

ionic

fullerene has ____ 5 membered chains and _____ 6 membered

12-5 and 20-6

which does not show catenation

Pb

monohalides of group 16 are

dimeric

Cl2o is a

reducing agent

____ oxidises nuclear fuel (puf2)

o2f2

shape of xeo3

pyramidal

shape of xeof4 is

square pyramidal

boiling point of group 15 is

N>P>AS>BI>SB

melting point of group 15 is

N>P>SB>BI>AS