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Class XI Revision Quiz Week 1 Day 3

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Question 1

Suppose the sides of a triangle form a geometric progression having common ratio r. Then r lies in the interval

Question 2

Find the number of ways of selecting 12 teams from 16 men and 16 women, such that each team consists of a man and a woman.

Question 3

Let

be the set of all ordered pairs

of positive integers, with

and

The number of elements in

Question 4

In the binomial (2^1/3 + 3^-^1/3)ⁿ, if the ratio of the seventh term from the beginning of the expansion to the seventh term from its end is 1/6, then n equals

Question 5

The sum of those integers from 1 to 100 which are not divisible by 3 or 5 is

Question 6

A tennis ball is hit with velocity 30 m/s making an angle 60^◦ with horizontal. Calculate the time of flight of ball. Consider g = 10 m/s²

Question 7

A body covered a distance of L m along a curved path of a quarter circles. The distance and displacement respectively are:

Question 8

What will be the velocity of Superman running on the roof of a train moving in the opposite direction (with a velocity of 36 Km/h w.r.t. the train) as observed by an observer standing on the ground? (velocity of the train is 54 Km/h)

Question 9

A golf ball is hit by a club at 30ᵒto the horizontal with a kinetic energy E. What will be the kinetic energy at the highest point?

Question 10

An aeroplane is flying with a horizontal velocity u and height h. It drops a food packet to ground. What will be the velocity of packet dropped from it on the ground?

Question 11

A 20 g object is moving with velocity

The de Broglie wavelength (in m) of the object is
[Planck’s constant

Question 12

The maximum number of electrons that can be filled in the shell with the principal quantum number

Question 13

The optical transition in the He⁺spectrum from n = 4 to n = 2 corresponds to which transition in the hydrogen spectrum?

Question 14

In the hydrogen spectrum the frequency of a line resulting from the transition of the line resulting from transition of electron from orbit of quantum number n_x to quantum number n1 is f. In a hydrogen- like atom the same transition gives rise to a spectral line of frequency 9f. The hydrogen like atom has atomic number

Question 15

2.51 If R be the Rydberg constant, then the energy of an electron in the ground state of hydrogen atom is

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Nov 26JEE & BITSAT