Explanation

• An ionic bond forms when one or more electrons are transferred from one atom to another.
• Ionic bond: Formed by electron transfer, e.g., sodium chloride (NaCl).

Additional information:

• Covalent bond: Formed when atoms share electron pairs, e.g., water (H₂O).
• Metallic bonding: Positive metal ions are held together by attraction to delocalized electrons.
• Coordinate (dative) bond: A covalent bond in which both shared electrons are donated by one atom.

Last verified on 15-10-2026

Explanation

Etiquette : آداب

Explanation

• Aviary: a large cage, building, or enclosure for keeping birds in.
• Zoo: an establishment which maintains a collection of wild animals, typically in a park or gardens, for study, conservation, or display to the public.
• Apiary: a place where bees are kept; a collection of beehives.
• Armoury: a place where weapons are kept.

Explanation

• 'Ornithologist' is a person "who specializes in the study of birds".
• 'Biologist' is a person who studies biology.
• 'Naturalist' is a person who studies and knows a lot about plants and animals.
• 'Zoologist' is a person who scientifically studies animals.

Explanation

The word CHORD has 5 distinct letters: C-H-O-R-D.

When taking all the letters together, the number of ways to arrange them is equal to the number of permutations of 5 items, which is calculated as:

5! = 5 × 4 × 3 × 2 × 1 = 120

Explanation

• Atoms of the same element with different numbers of neutrons are called isotopes.
• Atoms of the same element have the same number of protons and electrons but different numbers of neutrons.

Explanation

• When salt is added to pure water, the boiling point of the solution increases.
• This is known as boiling-point elevation.
• The boiling point of a solution is higher than that of the pure solvent (water)
• Because the dissolved salt particles disrupt the formation of vapor bubbles,
• Requiring more energy to overcome the surface tension and escape the solution as vapor.

Explanation

• The word "avidly" means with great enthusiasm or eagerness, which fits the context of a miser gazing at a pile of gold coins.
• A miser is someone who loves money and material wealth, so it's likely they would gaze at their treasure with a strong desire and enthusiasm.
• Here's the sentence with the correct answer: The miser gazed avidly at the pile of gold coins in front of him.
  

Explanation

The coulomb, also written as its abbreviation 'C', is the SI unit for electric charge.

One coulomb is equal to the amount of charge from a current of one ampere flowing for one second.

One coulomb is equal to the charge on 6.241 x 1018 protons.

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Explanation

• Plants absorb most of the water they need through their root hairs, which are small, thin extensions of the roots that increase the surface area for absorption.
• Root hairs are typically found in the rhizosphere, the region of soil surrounding the roots, and are responsible for absorbing water and nutrients from the soil.