DEMOEXAM | ScoreExams

Question 1 of 10

Which of the following has maximum number of lone pairs associated with Xe?

A{tex}XeF_4{/tex}

B{tex}XeF_6{/tex}

C{tex}XeF_2{/tex}

D{tex}XeO_3{/tex}

Question 2 of 10

Any point on the hyperbola (x+1)²/16 - (y-2)²/4 = 1 is of the form

A(4 sec θ, 2 tan θ)

B(4 sec θ + 1, 2 tan θ - 2)

C(4 sec θ - 1, 2 tan θ - 2)

D(4 sec θ - 1, 2 tan θ + 2)

Question 3 of 10

In a polymer sample, 30% of molecules have a molecular mass of 20,000 40% have 30,000 and the rest 60,000. What is the weight average molecular mass of the polymer?

A40,300

B30,600

C43,333

D50,400

Question 4 of 10

According to MO theory, which of the following ranks the nitrogen species in terms of increasing bond order?

A{tex}N^{2-}_{2} < N^{-}_{2} < N_2{/tex}

B{tex}N_2 < N^{2-}_{2} < N^{-}_{2}{/tex}

C{tex}N^{-}_{2} < N^{2-}_{2} < N^{-}_{2}{/tex}

D{tex}N^{-}_{2} < N_2 < N^{2-}_{2}{/tex}

Question 5 of 10

A binary liquid solution is prepared by mixing n - heptane and ethanol. Which one of the following statement is correct regarding the behaviour of the solution?

AThe solution formed is an ideal solution

BThe solution is non-ideal showing +ve deviation from Raoult's law

CThe solution is non-ideal, showing -ve deviation from Raoult's law

Dn - heptane shows +ve deviation while ethanol shows -ve deviation from Raoult's law

Question 6 of 10

The average monthly salary of workers in a factory is Rs. 206. If the average monthly salary of males and females are Rs. 210 and Rs. 190 respectively, the percentage of female employed in the factory is

A10

B50

C30

D20

Question 7 of 10

Racemic mixture is formed by mixing two

Aisomeric compounds

Bchiralcompunds

Cmeso compounds

Denantiomers with chiral carbon

ENone of these

Question 8 of 10

Under which one of the following conditions, does the reaction take place,

ANH4OH / 80°C

Bconc.H₂SO_4s160Â°C

CAnhydrous ZnCl2 / 150°C

DCH3OK /160 - 200°C

Question 9 of 10

Which of the following statement is true?

A{tex}HClO_4{/tex} is aweaker acid than {tex}HClO_3{/tex}

B{tex}HNO_3{/tex} is a stronger acid than {tex}HNO_2{/tex}

C{tex}H_3 PO_3{/tex} is a stronger acid than {tex}H_2 SO_3{/tex}

DIn aqueous medium HF is a stronger acid than HCl

Question 10 of 10

A needle made of bismuth is suspended freely in a magnetic field. The angle which the needle makes with the magnetic field is

A0°

B45°

C90°

D180°

Eany angle with which it is placed