JEE Main Class XI Weekly Mock 12 for JEE & BITSAT Exams

Question 1

The pKa of a weak acid (HA) is 4.5. The pOH of an aqueous buffered solution of HA in which 50% of the acid is ionized is

Question 2

Two pairs of salts are given, each in 0.1M aqueous solution. Which solution has a higher pH?

Question 3

What % of the

should be in buffer of

so as to have a neutral solution? (K_a = 4 × 10^–7)

Question 4

Which of the following solutions when added to 1L of a 0.01 M CH₃COOH solution will cause no change in the degree of dissociation of CH₃COOH and pH of the solution

= 1.6 × 10^–5.

Question 5

What is the difference in pH for 1/3 and 2/3 stages of neutralisation of 0.1 M CH₃COOH with 0.1 M NaOH ?

Question 6

Which of the following statements regarding measures of dispersion is INCORRECT-

Question 7

Consider the following statements:
1) Standard deviation is also known as root mean square deviation.
2) Standard deviation provides accurate results.
3) Square of standard deviation is called variance.
4) Standard deviation is oldest measure of deviation.
Number of correct statements are-

Question 8

Which of following statements are INCORRECT-

Question 9

Given, Variance of a data observation set is 961. Choose the correct option-

Question 10

Given, Mean deviation of a given data observation set is equal to 21 and standard deviation is equals to 41. Then-

Question 11

A metal sphere weighs (200 gram) × g in air and (170 gm) × g in water. Then find the volume of cavity in metal sphere. If $Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-3-New_files\image153.png$ ; $Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-3-New_files\image154.png$

Question 12

A water fountain on the ground sprinkles water all around it. If the speed of water coming out of the fountain is v, the total area around the fountain that gets wet is

Question 13

A small ball of density ρ is immersed in a liquid of density

to a depth h and released. The height above the surface of water upto which ball will jump is

Question 14

Water in a tank is filled to a depth H whose side walls are vertical. A hole is made on one of the walls at a depth h below the free surface of water. If R is the distance at which the stream strikes the ground, then –

Question 15

Which of the following graphs may represent the relation between the capillary rise h and the radius r of the capillary?