Explanation

1-Butyne is an alkyne, and the hydrogen atom attached to the triple-bonded carbon is relatively acidic due to the high s-character of the carbon involved in the triple bond.

This allows it to donate a proton (H+) in an acid-base reaction. 

Explanation

In butterflies, the female is XY or X0. 

Butterflies have a unique sex determination system where males have two or more X chromosomes (XX, XXX, etc.)

And females have one X chromosome and either another X or no second sex chromosome (XY or X0).

This differs from humans and most mammals, where females are XX and males are XY. 

Explanation

Light intensity refers to the amount of light energy reaching a plant's surface per unit time.

This directly impacts the rate of photosynthesis as more light energy available means more ATP and NADPH can be produced, driving the Calvin cycle

Higher light intensity generally leads to increased photosynthetic activity. 

Explanation

To obtain greater dispersion by a diffraction grating, the slit separation should be decreased. 

Dispersion:

• In diffraction gratings, dispersion is the separation of light wavelengths during diffraction, with greater dispersion resulting in wider color separation.

Slit separation:

• The distance between individual slits on the grating is called the slit separation.

Relationship between slit separation and dispersion:

• Smaller slit separations lead to larger angles of diffraction for a given wavelength, resulting in greater dispersion.
• Imagine the light waves as being "bent" more by the closer slits, causing them to spread out further

Explanation

Rotational kinetic energy of a disc about its center:  

K.E = (1/2) I ω², where I = moment of inertia.

For a disc, I = (1/2)MR²,  

So, K.E = ½ × (½ MR²) × ω² = ¼ MR²ω²

If linear velocity v = Rω, then  

K.E = ¼ Mv²

Explanation

• T = dominant allele (e.g., tall)
• t = recessive allele (e.g., short)

Explanation

At the highest point of a projectile's motion:

- Its velocity is purely horizontal (vertical component = 0).

- Its acceleration is still vertically downward due to gravity.

So, the velocity vector is horizontal, and the acceleration vector is vertical ⇒ they are perpendicular.

∴ Angle between velocity and acceleration = 90°  

Explanation

Given:

- Length of string, L = 30 cm

- In 2nd harmonic, L = 3λ/4

Solving:

30 = (3/4)λ  

⇒ λ = (4 × 30) / 3 = 40 cm

Explanation

The chemical formula for palmitic acid is C₁₆H₃₂O₂.

It is also known as hexadecanoic acid.

Palmitic acid is a saturated fatty acid, meaning it contains only single bonds between carbon atoms. 

Explanation

A body in equilibrium means all the forces acting on it are balanced, resulting in no net force.

Since acceleration is directly related to the net force (F = ma), if the net force is zero, then the acceleration must also be zero.