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The product “P” in the below reaction is

The product “P” in the below reaction is: Answer: (d) Hence the answer is d... View Article

The type of pollution that gets increased during the day time and in the presence of O₃ is

a. Global warming b. Reducing smog c. Acid rain d. Oxidizing smog Answer: (d) NO + O2 → NO2 NO + O3 → NO2 + O2 O + O2 → O3 This... View Article

The products “A” and “B” formed in the below reactions are:

The products “A” and “B” formed in the below reactions are: Answer: (a) Hence the answer is a... View Article

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The size of the Bk³⁺ ion is less than the Np³⁺ ion. Reason R: The above is a consequence of the lanthanoid contraction.

In the light of the above statements, choose the correct Ans: from the options given below: a. A is false but R is true b. Both A and R are... View Article

A group 15 element, which is a metal and forms a hydride with the strongest reducing power among group 15 hydrides. The element is:

a. Bi b. As c. P d. S Answer: (a) BiH3 is the strongest reducing agent among the hydrides of 15 group elements as Bi – H bond dissociation... View Article

Which of the following reaction/reactions DOES NOT involve Hoffmann bromamide degradation?

Which of the following reaction/reactions DOES NOT involve Hoffmann bromamide degradation? Answer: (d) Hence the answer is d... View Article

In the below chemical reaction, intermediate “X” and reagent/condition “A” are:

In the below chemical reaction, intermediate “X” and reagent/condition “A” are: Answer: (c) hence the answer is c... View Article

A boy of mass 4 kg is standing on a piece of wood having mass 5 kg.

A boy of mass 4 kg is standing on a piece of wood having mass 5 kg. If the coefficient of friction between the wood and the floor is 0.5, the... View Article

Suppose you have taken a dilute solution of oleic acid in such a way

Suppose you have taken a dilute solution of oleic acid in such a way that its concentration becomes 0.01 cm3 of oleic acid per cm3 of the... View Article

The disc of mass M with uniform surface mass density σ is shown in the figure.

The disc of mass M with uniform surface mass density σ is shown in the figure. The centre of mass of the quarter disc (the shaded area) is... View Article

Seawater at a frequency f = 9 × 10² Hz, has permittivity ∈ = 80∈₀ and resistivity ρ = 0.25 Ωm.

Seawater at a frequency f = 9 × 102 Hz, has permittivity ∈ = 80∈0 and resistivity ρ = 0.25 Ωm. Imagine a parallel plate... View Article

A body of mass 1 kg rests on a horizontal floor with which it has a coefficient of static friction 1/√3.

A body of mass 1 kg rests on a horizontal floor with which it has a coefficient of static friction 1/√3. It is desired to make the body... View Article

The electric field in a region is given by [latex]vec{E}=frac{2}{5}E_{0}i+frac{3}{5}E_{0}j[/latex] with E₀=4.0×10³N/C.

The electric field in a region is given by with E0=4.0×103N/C. The flux of this field through a rectangular surface are 0.4 m2 parallel... View Article

A particle of mass m moves in a circular orbit in a central potential field U(r) =U_0r4.

A particle of mass m moves in a circular orbit in a central potential field U(r) =U0r4. If Bohr's quantization conditions are applied, radii of... View Article

A 2μF capacitor C₁ is first charged to a potential difference of 10V using a battery.

A 2μF capacitor C1 is first charged to a potential difference of 10V using a battery. Then the battery is removed and the capacitor is... View Article

The image of an object placed in the air formed by a convex refracting surface is at a distance of 10 m behind the surface.

The image of an object placed in the air formed by a convex refracting surface is at a distance of 10 m behind the surface. The image is real and... View Article

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