New Concepts/Shortcuts 3 Flashcards
shortcut for acceleration, friction exerted, and KE of a rolling object
and what’s the work done friction!?
how to approach this q!?
the total energy would be constant here
so find the total energy due to spring. rotational, translation, etc and then differentiate it with respect to t
then we would have an expression with respect to alpha and stuff where we can find the angular frequency expression
Trick for rotational pulley problems(finding alpha)
polytropic process formula for work done, molar heat capacity, heat exchange
what to do if we have a algebra+trigo equation and we have to find the number of solutoin
draw the graph of trigo and algebra part and find intersection points
expansion
damped equation formula from cos formulae
and also the angular frequency formula in a damped oscillation
potential gradient formula
where Ro is the resistance of the 1 m wire
and R1 is the internal resistance of the main Emf battery(not the one we have to find(
what if we have a number whose remainder is something other than 1
repeat the process till we have a 1 as a remainder
what forms a poorly soluble precipitate with reaction with Ph-SO2Cl
primary and secondary amine forms poorly soluble ppt wit h reaction with R-SO2Cl
Let A₁, A₂, …, An, n arithmetic means are inserted between two numbers ‘a’ and ‘b’ such that a, A₁, A₂, …, An, b from an AP.
write the formula for Ar
do we use end correction in the resonance tube?
only if we have to find the length of resonance
but if we have to find velocity, it isnt counted as the end correction gets subtracted in l2-l1
What’s the unit of planks constant?
Js
at t=inf P.D across inductor=?
0
benzene with an excess of Cl2 in the presence of AlCl3 forms?
friedal craft reactin doesnt happens with___-
partial double bond character
nu of photons/spectral lines if we have the ending and starting orbit number
which series lies in visible,IR and UV region
time taken for photocurrent is in the order
10^ -9
gunmetal consists of
Cu, Sn,Zn
epoxides in the acid medium have which kind of reaction and what if it’s in basic medium!?
What’s the perfect condition with respect to the magnetic susceptibility for a diamagnetic material?
magnetic susceptibility = -1 for a diamagnetic material
curie’s temperature formula for ferromagnetic and paramagnetic material
draw the hysteresis graph
and whats coercivity and retentivity
star delta method for capacitors
relation between E,C,B with vectors
kjeldahl’s method shortcut
ignore the NaOHif not given
subtract the 2MV of H2SO4 from MV of the NaOH which would be equal to x
put it in the formula % of N = x * 1.4/w
w being the weight of compound given
what are Lissajous figures and how to solve Lissajous figures questions
figures formed by the superposition of two perpendicular time-varying functions
two find the figures
eliminate the t and find the equation between x and y and then we can find the figure shapes
eg of homogenous catalysis
whats heterogenous catalysis
The catalytic process in which the reactants and the catalyst are in different phases is known as heterogeneous catalysis.
eg of heterogeneous catalysis
explain the diffusion of reaction products away from the catalyst surface mechanism
Diffusion of reaction products away from the catalyst’s surface. The surface of the catalyst unlike the inner part of the bulk, has free valencies which provide the seat for chemical forces of attraction. When a gas comes in contact with such a surface, its molecules are held up there due to loose chemical combination. If different molecules are adsorbed side by side, they may react with each other resulting in the formation of new molecules. Thus, formed molecules may evaporate leaving the surface for the fresh reactant molecules.
the catalytic activity reactivity variation acc to grps
It has been found that for hydrogenation reaction, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity being shown by groups 7-9 elements of the
periodic table
how does CO with H2 react with different catalysts
why are zeolites good shape-selective catalysts?
Zeolites are good shape-selective catalysts because of their honeycomb-like structures
why are zeolites good shape-selective catalysts?
Zeolites are good shape-selective catalysts because of their honeycomb-like structures
on what does the reaction taking place in zeolites depend upon?
The reactions taking place in zeolites depend upon the size and shape of reactant and product molecules as well as upon the pores and cavities of the zeolites.
how are zeolites used in petrochemical industry
Zeolites are being very widely used as catalysts in petrochemical industries for the cracking of hydrocarbons and isomerization. An important zeolite catalyst used in the petroleum industry is ZSM-5. It converts alcohols directly into gasoline (petrol) by dehydrating them to give a mixture of hydrocarbons.
define enzymes
Enzymes are complex nitrogenous organic compounds which are produced by living plants and animals.
They are actually protein molecules of high molecular mass and form colloidal solutions in water.
