Explanation

• Symbol: Na (from Latin natrium)
• Atomic number: 11
• Atomic mass: 22.99 u
• Group: 1 (alkali metals)
• Period: 3
• State at room temperature: Solid

Explanation

"Some" is used with uncountable nouns like "coffee" when making polite offers or requests.

"Can you please give me some coffee?" is grammatically and contextually correct.

Explanation

A metaphor directly compares two unlike things without using "like" or "as."

Simile also compares but uses "like" or "as".

Alliteration is repetition of consonant sounds.

Explanation

Equisetum (Sphenopsida) is commonly called horse-tail due to its brush-like appearance.

It belongs to Pteridophytes.

It is a living fossil.

It is found near wetlands.

Explanation

The Earth bulges at the equator and rotates, creating a centrifugal force that slightly reduces gravity there.

At the poles, this effect is minimal, so ‘g’ is stronger at the poles than at the equator.

Explanation

Blood type O has no A or B antigens on the surface of red blood cells.

That's why type O is known as the universal donor in blood transfusion.

Explanation

1 Volt (V) is equal to 1 Joule per Coulomb (JC^-1).

Explanation

An electric generator works on the principle of electromagnetic induction.

Faraday's law states that a changing magnetic flux induces an emf, which is the working principle of generators.

Explanation

• In a sample of a substance, the particles (atoms or molecules) have a distribution of energies at any given temperature. This is known as the Maxwell-Boltzmann distribution.
• According to this distribution, some particles have high energies, while others have low energies, but the average energy of the particles is constant at a given temperature.
• The energy of individual particles in a sample is not the same, as they are in constant motion and colliding with each other, leading to a range of energies.
• This is why the concept of average energy or kinetic energy is used to describe the energy of a sample as a whole.

Explanation

• The grammatical error in the sentence is: "are".
• The subject of the sentence is "Twenty five kilometers", which is a singular noun phrase, so the verb should be singular as well. The correct verb would be "is", not "are".
• The corrected sentence would be: "Twenty five kilometers from Hala to Hyderabad is a long distance."