The coefficient of superficial thermal expansion of a plate of area A is 𝛽 then the change in area by increasing its temperature ∆𝜃 will be

For an intrinsic semiconductor (n_e→ concentration of electron, n_h→ concentration of hole)

The ratio of the diameter of two wires of the same material is n:1. The length of wire 1 m each on applying the same load, the increase in the length of thin wire will be

The uncertainty in the momentum ∆𝑝 of a ball of mass 0.5𝑘𝑔 travelling at 20𝑚/𝑠 is 1 × 10 −6 of its momentum. the uncertainty in position ∆𝑥 will be

Which of the following alkali metal is used in devising photoelectric cells:

In the given reaction, substrate 𝐶₆𝐻₆ + 𝐶𝐻₃𝐶𝑂 ⁺ → 𝐶₆𝐻₅𝐶𝑂𝐶𝐻₃

Which of the following compound is deliquescent in crystalline form

Alkali metals dissolve in liquid 𝑁𝐻₃ to from deep blue solution. The blue colour of the solution is due to:

𝑃𝐻₃ + 𝐻𝐵𝑟 → 𝑃𝐻₄𝐵𝑟 in given reaction 𝑃𝐻₃ works as-

tan (750)degrees =

[2𝑖̂ 3𝑗̂ − 5𝑘̂] =

The sum of two forces is 18 N and the resultant whose direction is at right angles to the smaller force is 12 N. The magnitude of the two forces is

In the group of 5 girls and 8 boys. In how many ways is a team of 5 members selected if the team has at least 1 boy and 1 girl

If set 𝐴 × (B⋂C) = {(1,1); (1,2); (2,2); (2,1)} then the set A can be

Correct sequence of layers of bacterial cell envelope from outward to inward is

According to most recent studies each chromosome consists of

Arrange the following steps in a correct sequence as per Gram’s staining techniques:

(1) Treatment with 0.5% iodine solution

(2) washing with water,

(3) treatment with absolute alcohol/acetone,

(4) staining with a weak alkaline solution of crystal violet

Prolonged hyperglycaemia leads to a complex disorder called diabetes mellitus which is associated with

Which of the following hormone is incorrectly paired with its origin?