JEE Main Class XII Weekly Mock 15 for JEE & BITSAT Exams

Question 1

2D– = O + OH ¯ X and Y
(Y is alcohol, D is deuterium)
X and Y will have structure –

Question 2

In the given reaction final product(s) will be -

Question 3

Acetic acid can be used for the preparation of:

Question 4

The treatment of an ester with LiAlH₄ followed by acid hydrolysis produces: 

Question 5

Reducing property of formic acid is due to the presence of:

Question 6

Tritium

has a half-life of 12.5y against beta decay. What fraction of a sample of tritium will remain undecayed after 25y?

Question 7

In a radioactive series,

changes to

through n₁α decay process and n₂β decay process–

Question 8

The forward biased diode connection is :

Question 9

The circuit has two oppositely connected ideal diodes in parallel. What is the current flowing in the circuit ?

Question 10

For a transistor amplifier in common emitter configuration having load impedance of 1 kΩ (h_fe = 50 and h_oe = 25) the current gain is

Question 11

Let two fair six-faced dice A and B be thrown simultaneously. If E₁ is the event that die A shows up four, E₂ is the event that die B shows up two and E₃ is the event that the sum of numbers on both dice is odd, then which of the following statements is TRUE?

Question 12

A problem in mathematics is given to 3 students whose chances of solving the problem individually are $Description: Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-4-New_files\image246.png$ The probability that the problem will be solved at least by one is

Question 13

A dice is thrown 2n + 1 times, n ∈ N. The probability that faces with even numbers show odd number of times is -

Question 14

One hundred identical coins, each with probability, p, of showing up heads are tossed once. If 0 < p < 1 and the probability of heads showing on 50 coins is equal to that of heads showing on 51 coins, then the value of p is

Question 15

A coin is tossed twice and the four possible outcomes are assumed to be equally likely. If A is the event, 'both head and tail have appeared' and B the event,' at most one tail is observed,' then the value of P(B/A) is –