New Concepts/Shortcuts 5 Flashcards

1
Q

what is added to the sodium extract before the addition of

silver nitrate for testing of halogens and why

A

Nitric acid

because if CN– or S2– are present then they will be oxidised and removed before the test of halides

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2
Q

how would we find the field at a distance r!?

A

first find the charge enclosed in that range awdn then find the fied wit hthe formula below

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3
Q

stability order if there is a case of intramolecular hydrogen bonding in the conformation of butane

A
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4
Q

what does chromatography uses?

A

Al2O3

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5
Q

what to do if we have to find if a function has a zero between a particular given range

A
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6
Q

charge produced in a changing flux formula

and how does it depends on the time

A

it is independent of time

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7
Q

damped oscillation equation(differential form)

A
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8
Q

whats the formula for finding e

A

e=kx

where k is the potential gradient

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9
Q

write the general equation for this condition

A

the potential difference will be the same across the points

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10
Q

What’s the resistance of an ideal ammeter?!

A

zero

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11
Q
A
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12
Q

shortcut for finding the remainder of large numbers in powers

A

put the remainder obtained by putting only the number by the denominator and then multiply it with the number of times of power

if its -ve subtract it from the divisor

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13
Q

what’s the shortcut to finding the general term in an SNS

A
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14
Q

what does an electronic spectrum’s single broad peak represent?

A

it represents the max crystal field splitting energy (delta)

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15
Q

how much energy does a single electron of t2g orbital have?

A

-0.4 delta

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16
Q

for what kind of N compounds does Kjeldahl’s method doesn’t works!?

A

nitro-grp

N in a part of a ring

diazonium

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17
Q

closed organ pipe nth overtone formula and fundamental frequency formula

and velocity of sound formula in terms of density,pressure and in terms R and T

18
Q

what’s the difference in 2 consecutive resonating tube length

19
Q

taylor’s method for finding w, the time period

A

find the restoring force and differentiate it with respect to x and boom

20
Q

what does this mean?!

A

this means the vector joining (Z1 and Z3) and (Z1 and Z2) are perpendicular and are equal in lentgh

21
Q

surface charge density of semiconductor including holes and electrons

22
Q
A

non zero and uniform

23
Q

what does the degree of flatness mean in conic sections?

A

eccentricity

24
Q

how to find the image of a parabola

A

Find the image of the vertex! then sub it in the equation of shifted parabola where the constant(4a) will be same! just sub the vertex x-x’, y-y’ as Y^2=4AX

25
the boiling point of HC relation with H bonding types
its directly proportional to inter molecular H bonding
26
glucose with Br2 water forms?!
27
MOI of an equilateral triangle plane lamina
28
nitrile action with grignard reagent? with partial hydrolysis
29
the average value of sin x cos x sin^2 x cos^2 x
30
f(g(x))= ig g(x) is inverse of f(x)
f(g(x))=x
31
whats the electronic config of Fe+?!
32
equilibrium constant relation with temperature and enthalpy and entropy
33
1 molar is more/less concentrated than 1 molal solutions
more concentrated
34
the disslution of gas in liquid is exo or endo
exothermic
35
when does the maximum compression or elongation occur in the spring?
when the velocity of both the mass is equal
36
angle made by the resultant of two vectors formula
37
V max on a banked road formula
38
net permeablility constant formula
39
the time period of oscillation of a period of oscillation of compass needle
40
displacement current formula