The product is equal to :
Option: 1
Option: 2
Option: 3
Option: 4
Sum of an infinite GP
If a is the first term and r is the common ratio of a G.P. Then,
is the sum to infinite terms of the G.P.
Now,
Which of the following compounds is likely to show both Frenkel abnd Schottky defects in its crystalline form ?
Option: 1 AgBr
Option: 2 CsCl
Option: 3 KBr
Option: 4 ZnS
1
View Full Answer(2)Among the reactions (a) - (d), the reaction(s) that does / do not occur in the blast furnace during the extraction of iron is / are :
(a) (b)
(c)
(d)
Option: 1 (C) and (D)
Option:2 (A)
Option: 3 (A) and (D)
Option: 4 (D)
The following reactions do not occur in the blast furnace:
C)
D)
Therefore, Option(1) is correct.
View Full Answer(1)The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is : (A) (B)
(C)
(D)
Option: 1
Option: 2
Option: 3
Option: 4
As we have learnt,
contains
which has a
configuration having
and
contains
which has a
configuration. In a weak ligand field, it has
and hence has
contains
which has a
configuration. In a strong ligand field, these electrons get paired up and hence
and
contains
which has a
configuration. These electrons get paired in the presence of strong ligand like
and hence,
and correspondingly
.
Therefore, the correct order of spin only magnetic moment of the complexes is
Therefore, Option(4) is correct.
View Full Answer(1)A simple pendulum is being used to determine the value of gravitational acceleration g at a certain place. The length of the pendulum is 25.0 cm and a stop watch with 1 s resolution measures the time taken for 40 oscillations to be 50 s. The accuracy in g is :
Option: 1 2.40%
Option: 2 5.40%
Option: 3 4.40%
Option: 4 3.40%
As
where
m=mass of the bob
l = length of pendulum
g = acceleration due to gravity.
So
Note - We are adding the error just for calculating maximum possible error.
Hence the correct option is (3).
View Full Answer(1)
The phase difference between the current and the voltage in series LCR circuit at resonance is
Option: 1
Option: 2
Option: 3
Option: 4 zero
The phase difference between the current and the voltage in series LCR circuit at resonance is zero
At resonance Z=R
The phase difference between displacement and acceleration of a particle in a simple harmonic motion is:
Option: 1
Option: 2
Option: 3
Option: 4 zero
So the phase difference between x & a=
A resistance wire connected in the left gap of a metre bridge balances a 10 resistance in the right gap at a point which divides the bridge wire in the ratio 3:2. If the length of the resistance wire is 1.5 m, then the length of 1
of the resistance wire is:
Option: 1
Option: 2
Option: 3
Option: 4
For a meter bridge
From question
I.e For 1.5 m long wire its total resistance is 15
So using the unitary method
The length of resistance wire will be =
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