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All posts related to Engineering entrance

Sapna Krishnakumar
Shared from JEE Main Mock - 6 on Aug 29, 2020 3:57 PM

The number of solutions of tan x + sec x = 2 cos x in [0, 2π] is _____.

 
2
3
0
1
Please type your answer before submitting.
Sapna Krishnakumar

Yes there are only 2 solutions. Answer is wrong

Satvik Sinha
Shared from JEE Main Mock - 7 on Aug 26, 2020 3:29 PM

If 1, log9 (31 - x + 2), log3 [4.3x - 1] are in AP, then x equals

 
log3 4
1 - log3 4
1 - log4 3
log4 3
Please type your answer before submitting.
Satvik Sinha

Both b and d are correct!

Ashish Srivari
Shared from BITSAT - 2018 on Aug 20, 2020 4:51 PM

When N2O5 is heated at certain temperature, it dissociates as:

N2O5(g) N2O3 g + O2(g); Kc = 2.5
At the same time, N2O3 also decomposes as:
N2O3(g) N2O g + O2 (g)

If initially 4.0 moles of N2O5 are taken in 1.0 litre flask and allowed to dissociate and concentration of O2 at equilibrium is 2.5 M. Equilibrium concentration of N2O5 is:

 
1.0 M
1.5 M
2.166 M
1.846 M
Please type your answer before submitting.
Ashish Srivari

How did you solve for x when there are 2 variables and only one equation?

Harshit Reddy
Shared from BITSAT Mock - 2 on Aug 20, 2020 4:49 PM

A wire is wound in the form of spiral with 21 turns. The inner and outer radii are 1 cm and 8 cm, respectively. What is the magnetic field at the centre, when a current of 2A passes through it?

 
Please type your answer before submitting.
Harshit Reddy

This is a dc pandey example problem.

Adya
Shared from JEE Main Mock - 1 on Aug 17, 2020 12:08 PM

Consider the following reaction:



Identify the structure of the major product X.

 
Please type your answer before submitting.
Adya

What does 'D' represent?Option c is also a 3 degree free radical.