BITSAT 2019 Revision Test 8 for JEE & BITSAT Exams

Question 1

To obtain p-type Si semiconductor, we need to dope pure Si with

Question 2

An uncharged sphere of metal is placed in a uniform electric field produced by two large conducting parallel plates having equal and opposite charges, then lines of force look like:

Question 3

A metal ball immersed in Alcohol weights W₁ at 0°C and W₂ at 50°C. The coefficient of cubical expansion of the metal (γ)_m is less than that of alcohol (γ)_Al. Assuming that density of metal is large compared to that of alcohol, it can be shown that

Question 4

A body is thrown up in a lift with a velocity u relative to the lift and the time of flight is found to be t. The acceleration with which the lift is moving up is

Question 5

Two polaroid have their polarizing directions parallel so that the intensity of a transmitted light is maximum. The angle through which either Polaroid must be turned if the intensity is to drop by one-half is

Question 6

Permanent hardness cannot be treated by

Question 7

Which of the following elements form compounds which are largely covalent?

Question 8

Which of the following contaminants are known to over stimulate the growth of algae?

Question 9

Which of the following is a bactericidal antibiotic?

Question 10

1.0 g of an oxide of A contains 0.5g of A. 4.0g of another oxide of A contains 1.6g of A. The data indicates the law of

Question 11

Find the complex number z satisfying the equations

Question 12

If the sum of the coefficients in the expansion of (ax² – 2x + 1)³⁵ is equal to the sum of the coefficients in the expansion of (x – ay)³⁵, then α =

Question 13

The solution of differential equation (e^x + 1)y dy = (y + 1)e^x dx is:

Question 14

If a straight-line y – x = 2 divides the region x² + y² ≤ 4 into two parts, then the ratio of the area of the smaller part to the area of the greater part is

Question 15

If 4x + 4y – kz = 0 is the equation of the plane through the origin that contains the line

then k=