JEE Main Class XII Weekly Mock 9 for JEE & BITSAT Exams

Question 1

A velocity

m/s is resolved into two components along OA and OB making angles 30 ° and 45 ° respectively with the given velocity. Then the component along OB is

Question 2

Let

be unit vectors. Suppose

and the angle between

is

. Then

Question 3

The degree of differential equation satisfying the relation +

= n(x

–y) is

Question 4

A normal is drawn at a point P(x, y) of a curve. It meets the x-axis and y-axis in the points A and B respectively such that

+

= 1, where 'O' is the origin. The equation of such a curve passing through (5, 4) denotes -

Question 5

The order and power of differential equation

is

Question 6

Which of the subsequent ions has highest degree of paramagnetism?

Question 7

Which of these are square planar in shape?

Question 8

The hybridization of [Fe(CN)₆]^4- ion and the number of unpaired electrons in it are:

Question 9

When are Tetrahederal complexes formed
I. Where the central metal has low oxidation state
II. when the electronic configuration of CMI is d⁰, d⁵ or d¹⁰
III. when ligands are weak field ligands

Question 10

Which of the following statements are correct?

Question 11

The work function of metals is in the range of 2 eV to 5 eV. Find which of the following wavelength of light cannot be used for photoelectric effect.
[Consider, Planck constant = 4 x 10^–15 eVs, velocity of light = 3 x 10⁸ m/s]

Question 12

When a certain metal surface is illuminated with light of frequency v, the stopping potential for photoelectric current is V₀. When the same surface is illuminated by light of frequency

the stopping potential is (V₀/4).The threshold frequency for photoelectric emission is

Question 13

The potencial difference V required for accelerating an electron to have the de Broglie wavelength of 1A is

Question 14

Two identical photo-cathodes receive light of frequencies f₁ and f₂. If the velocities of the photo electrons (of mass m) coming out are respectively v₁ and v₂, then -

Question 15

The figure showing the correct relationship between the stopping potential V₀ and the frequency v of the light for potassium and tungsten is,