Aug 2025 R Chem MC

Aug 2025 R Chem MC

Assessment

Flashcard

Chemistry

12th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What are isotopes?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

2.

FLASHCARD QUESTION

Front

What is the significance of protons in an atom?

Back

Protons determine the atomic number of an element and its identity.

3.

FLASHCARD QUESTION

Front

What is a metallic bond?

Back

A metallic bond is a type of chemical bond that occurs between metal atoms, characterized by a 'sea of electrons' that are free to move.

4.

FLASHCARD QUESTION

Front

What is STP in chemistry?

Back

STP stands for Standard Temperature and Pressure, which is defined as 0 degrees Celsius (273.15 K) and 1 atmosphere (101.3 kPa) of pressure.

5.

FLASHCARD QUESTION

Front

How can solubility differentiate between NaCl and AgCl?

Back

NaCl is soluble in water, while AgCl is not, allowing for differentiation based on solubility.

6.

FLASHCARD QUESTION

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout.

7.

FLASHCARD QUESTION

Front

What is the difference between a mixture and a pure substance?

Back

A mixture contains two or more substances that retain their individual properties, while a pure substance has a uniform and definite composition.

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