Upsee

Which of the following molecules is optically active ?

(A) (i) and (ii) 

(B) (i) and (iii) 

(C) (ii) and (iii) 

(D) (i), (ii) and (iii)

If the point (α, α) lies between the lines  |2x  + y| = 5 then select one of the most appropriate option:

(A)  |α| < 5/2

(B)  |α| < 5/3

(C)  |α| < 7/2

(D)  |α| < 11/3 

CH₃MgI will give methane with 

(A) C₂H₅OH 

(B) CH₃–CH₂–NH₂

(C) both of these (A and B) 

(D) None of these

A method of removing excess solute from a colloidal solution is 

(A) Distillation 

(B) Crystallization 

(C) Dialysis 

(D) Gas chromatography

Which element is not in first transition series? 

(A) Fe 

(B) V 

(C) Ag 

(D) Cu

Let A = {u, v, w, z} and B= {3 , 5} , then the number of relations from A to B is :

(A)  64 

(B)   256

(C)  1024

 (D)  512 

Let the equation of a curve is given in implicit form  as y = tan(x + y). Then d²y/dx² in terms of y is :

(A)   2(1 + y²)²/y²

(B)   2(1 + y²)/y⁶

(C)   -2(1 + y²)/y⁶

(D)   -2(1 + y²)/y⁵

During the adiabatic expansion of 2 moles of an ideal gas, the increase in internal energy was found to be equal to (–200 J). The work done by the gas during the process will be equal to 

(A) 0 

(B) 400 J 

(C) –200 J 

(D) 200 J

For given LR circuit, growth of current as function of time t is shown in graph. Which of the following option represents value of time constant most closely for the circuit?

(A) 0.4 s 

(B) 0.7 s 

(C) 1 s 

(D) 2.4 s 

A circular disc of radius R rolls without slipping along the horizontal surface with constant velocity v₀. We consider a point A on the surface of the disc. Then, the acceleration of the point A is 

(a) constant in magnitude 

(b) constant in direction 

(c) constant in magnitude as well as direction 

(d) None of the above