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New Concepts > New Concepts/Shortcuts 19 > Flashcards

New Concepts/Shortcuts 19 Flashcards

1
Q

the formula for new means if the wrong observation is deleted and the new one is added

A
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2
Q

why does the stability of peroxide or superoxide increase as the size of the metal increases?

A

due to the stabilization of large anions by larger cations through lattice energy

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3
Q

metals with liquid ammonia forms? and then on concentration forms?

A
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4
Q

what trend Does the MP and BP of halogens always follow?!

A
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5
Q

the low solubility of LiF in water is due to the?

A

its higher lattice enthalpy

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6
Q

the low solubility of CsI is due to?

A

smaller hydration enthalpy

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7
Q

LiCl and MgCl2 are soluble in?

A

ethanol

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8
Q

hydrogen carbonates are not formed by which metals?

A

Li and Mg

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9
Q

why cant the potassium carbonate be produced from the Solvay process?

A

because potassium hydrogen carbonate is too soluble in the ammonium hydrogen carbonate

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10
Q

which grp 2 element is not alkaline earth metal?

A

beryllium

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11
Q

hydration enthalpy of alkaline earth metals is more/less than the hydration enthalpy of alkali metals?

A

hydration enthalpy of alkaline earth metals is more than the hydration enthalpy of alkali metals?

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12
Q

most reducing earth metal is?

A

barium

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13
Q

which alkaline earth metals do not give flame test

A

beryllium and magnesium

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14
Q

beryllium in which form reacts with air and what does it form?

A

Be in powdered form reacts with air and burns brilliantly on ignition in the air to give BeO and Be3N2

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15
Q

which alkaline metal does not combine with Hydrogen upon heating to form its hydride?

A

Beryllium

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16
Q

how can BeH2 be created?

A
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17
Q

why are metal fluorides less soluble than chloride?

A

high lattice energies

18
Q

the tendency to form halides generally increases or decreases down the grp for alkaline earth metals?

A

decreases down the grp

19
Q

chlorides of which metals have a Cli bridge in vapor phase?

A

Be and Al

20
Q

just keep this in mind

A
21
Q

important ingredients present in Portland cement are?

A 
tricalcium silicate (3CaO · SiO2)
dicalcium silicate (2CaO · SiO2)
tricalcium aluminate (3CaO · Al2O3)
tetra-calcium aluminoferrite (4CaO · Al2O3Fe2O3).
22
Q

whats glyptal? what is it made up of and where is it used?

A

it is used in paints and lacquer

23
Q

dacron made of?

A

ethylene glycol and terephthalic acid

24
Q

nylons/polyamide is an eg of which kind of polymers?

A

condensation polymers

25
Q

novolac formation reaction

A
26
Q

bakelite structure

A
27
Q

melamine formation reaction

A
28
Q

how is PHBV formed and what’s the full form of PHBV?

A

poly beta-hydroxybutyrate - co-beta-hydroxy valerate

29
Q

eg of biodegradable polymers?

A

PHBV

nylon 2-nylon 6

30
Q

K2MnO4 in acid forms!?

A
31
Q

eg of fat-soluble vitamins and eg of water-soluble vitamins

A

fat soluble:- A,D,E,K

water soluble:- B grp and C

32
Q

eg of fat-soluble vitamins and eg of water-soluble vitamins

A

fat soluble:- A,D,E,K

water soluble:- B grp and C

33
Q

vitamins that should be supplied regularly in diest are? and why?

A

water-soluble vitamins( B grp and C)

because they are readily excreted in urine and cannot be stored in our body

34
Q

which water soluble vitamins can not be readily excreted in urine and cannot be stored in our body

A

B 12

35
Q
A
36
Q

length of antenna formula

A

lambda being the wavelength of the signal

37
Q

energy density formula for electric and magnetic field

A
38
Q

partially filled dileectric formula

A
39
Q

what are polycrystalline solids?

A

there are some solids that apparently appear amorphous but have microcrystalline structures these are polycrystalline solids

metals often occur in polycrystalline condition

40
Q
A

New Concepts (24 decks)

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