What is the chemical symbol for water?
The chemical symbol for water is H2O, indicating that each molecule consists of two hydrogen atoms and one oxygen atom.
Chemistry MCQs
The Chemistry section covers chemical reactions, atomic structure, periodic table, acids & bases, and organic chemistry.
This section is useful for exams like NEET, SSC, Bank, and Engineering Services.
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Which element is a noble gas?
Neon is a noble gas, which is inert and does not readily react with other elements.
What is the pH of pure water at 25°C?
The pH of pure water at 25°C is 7, indicating a neutral solution.
Which of the following is an alkali metal?
Sodium is classified as an alkali metal, which is highly reactive and found in Group 1 of the periodic table.
What is the main gas produced during photosynthesis?
During photosynthesis, glucose is produced, while oxygen is released as a byproduct.
What is the chemical formula for table salt?
The chemical formula for table salt is NaCl, which consists of sodium and chlorine.
Which particle has a positive charge?
Protons carry a positive charge, while electrons are negatively charged and neutrons have no charge.
What is the most abundant gas in the Earth's atmosphere?
Nitrogen is the most abundant gas in the Earth's atmosphere, making up about 78% of the air.
What is the process by which plants lose water through small openings in their leaves called?
Transpiration is the process by which plants lose water vapor through small openings known as stomata.
Which of the following is an example of a covalent bond?
H2O (water) is an example of a covalent bond, where atoms share electrons.
What is the atomic number of carbon?
The atomic number of carbon is 6, indicating it has six protons in its nucleus.
Which acid is found in vinegar?
Acetic acid is the main component of vinegar, giving it its sour taste.
What is the term for a substance that speeds up a chemical reaction without being consumed?
A catalyst is a substance that increases the rate of a chemical reaction without undergoing any permanent chemical change itself.
What type of bond is formed when electrons are transferred from one atom to another?
An ionic bond is formed through the transfer of electrons from one atom to another, resulting in the attraction between positively and negatively charged ions.