useful JET competition Sample Questions

1.

1 point

The pressure of a certain mass of air at constant volume increases from 75cm of mercury at 15*C to 91cm of mercury at 75*C. Calculate the pressure coefficient of the air.

3.76 x 10^-3 K^-1

1.25 x 10^-5 K^-1

3.56 x 10^-3 K^-1

1.25 x 10^-3 K^-1

2.

1 point

A bag P contains 4 white and 3 black balls, and a bag Q contains 5 white and 2 black balls. A ball is drawn at random from P and put into Q. A ball is then drawn at random from Q. Find the probability that the ball drawn from Q has Thesame colour with that drawn from P.

33/56

25/64

23/26

3/8

3.

1 point

A light ray moves from glass to water, if the incidence angle in the glass medium is 30*, Calculate the refracting angle in the water medium. Given that the two refractive indices are 1.50 and 1.33 respectively.

22.1 degrees

34.3 degrees

19.5 degrees

41.6 degrees

4.

1 point

A mass M of water at 100*C is added to another mass m of water at a tenpperature t, and the resulting temperature is T. If the ecific heat capacity of water is 4.2J/(gK), T can be given in terms of other quantities as ....

(100M + mt)/(M + m)

(100m - Mt)/(4.2M - m)

(100M - mt)/(M - m)

NOTA

5.

1 point

Find the minimum value of y in the equation y = 1 - 2x - 3x^2

5/4

3/4

5/3

4/3

6.

1 point

A pendulum bob of mass, 2kg attached to a string 1m in length, is made to swing in horixontal circle of radius 50cm. Calculate the Tension in the spring and the Period respectively.

( g = 10N/kg

1.85s and 20N

1.99s and 23.09N

1.99s and 20N

1..85s and 23.09N

7.

1 point

How many sp^2 hybridized carbon atoms are present in a molecule of benzene ?

note; write in words

8.

1 point

Given That E@(Zn^2+/Zn) = -0.76V and the emf for the cell X/X^2+//Zn^2+/Zn as +1.8V, Calculate the value of E@[X^2+/X].

+1.04V

+2.56V

-1.04V

-2.56V

9.

1 point

The Model colour code of Oxygen is

Blue

Yellow

White

Red

10.

1 point

If pie/2 </= @ </= 2pie. <br />
Find the maximum value of
F(@) = 4
------------
6 + 2Cos@

1/2

2/3

1

4

11.

1 point

A person standing in from of a vertical plane mirror can just see the whole of his reflected image when the mirror is suitably placed, if the length of the mirror is .............

1/2 of his height

1/4 of his height

exact lenght as that of his height

2/3 of his height

12.

1 point

The expression an^2/v^2 in van der waal equation is caalled ............

Pressure correction

van der waal forces

molar volume

Intermolecular Forces

13.

1 point

How many pie electrons are present in But-1,3-diene

3

1

4

2

14.

1 point

Which of the following law can be regarded as an expanded form of ''State function'' ?

Hess law of heat summatiion

Molecular Orbital theory

Le chattler Principle

2nd Law of thermodynamic

15.

1 point

If
| -x 2| = |3 3x|
| 4x 1| |4 -5|

Find the value of 'x'

5

-5

-2

2