Explanation

 The oxidation of hypo (chlorous acid) to 1-butanone does not give 1-butanol or 2-chloro-1-butanol, so the correct answer is  None of the above. 

Hypochlorous acid (HOCl) is an oxidizing agent , but it does not convert 1-butanone (a ketone) back to an alcohol (1-butanol). 

The reaction of HOCl with 1-butene would result in the addition of chlorine and hydroxyl groups to the double bond, forming 2-chloro-1-butanol, not 1-butanol. 

Explanation

The speed of sound in a gas is proportional to the square root of temperature (in Kelvin):

v ∝ √T

If the temperature becomes 16 times, then:

New speed = √16 × original speed = 4 × original speed

Explanation

To determine the limiting reagent, use the balanced chemical equation:

C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O

From the equation:

- 1 mole of ethanol reacts with 3 moles of O₂.

You have:

- 2 moles of ethanol

- 6 moles of oxygen

Required O₂ for 2 moles ethanol = 2 × 3 = 6 moles

Since you have exactly 6 moles of O₂, both ethanol and oxygen are completely consumed.

Explanation

The coordination number of an ion in square planar geometry is:  4. 

A square planar geometry has the central ion bonded to four ligands, forming a square plane around

Explanation

 The sex of a baby is determined by the sperm that fertilizes the egg.

If the sperm carries a Y chromosome, the baby will be a son.

If the sperm carries an X chromosome, the baby will be a daughter.

Since the chances of receiving a Y or an X chromosome are roughly equal, the probability of having a son or a daughter is approximately 50/50, or 1:1. 

Explanation

Total distance = Length of train + Length of bridge = 100 m + 200 m = 300 m  

Speed = 15 m/s  

Time = Distance / Speed = 300 / 15 = 20 seconds

Explanation

 The element that has the same oxidation number in all its compounds is Fluorine. 

Fluorine is the most electronegative element, so it always has an oxidation number of -1 in all its compounds

Explanation

 A "hybrid" refers to an organism that has inherited different alleles for a trait from each parent, making it heterozygous. 

Explanation

 The lifetime of an electron in a metastable state is significantly longer than in an ordinary excited state, typically by 10³ to 10⁵ times. 

Ordinary excited states have lifetimes on the order of 10⁻⁸ seconds. 

Metastable states have lifetimes that can range from microseconds to milliseconds and even longer, being orders of magnitude longer than typical excited states.

Therefore, options like 10³ or 10⁵ are appropriate estimations for how much longer a metastable state lifetime is compared to an ordinary excited state. 

Explanation

The formation of the primitive streak occurs during the gastrula stage of embryogenesis. 

The primitive streak is a crucial structure that appears at the beginning of gastrulation,

A stage where the three germ layers (ectoderm, mesoderm, and endoderm) are established.

It serves as a pathway for cells to migrate and differentiate into these germ layers