Tayari24

CET 12th Level — Chemistry (basic reactions) MCQs

Practice 20 free chemistry (basic reactions) multiple choice questions for CET 12th Level exam. Instant answers with explanations in Hindi and English.

Master Chemistry (basic reactions) under Basic Science for CET 12th Level with our curated MCQ set. Every question follows real Rajasthan exam patterns. Switch between Hindi and English anytime.

CET 12th Level — Basic Science — Chemistry (basic reactions)

20 Questions • Instant results & explanations • Hindi & English

0 / 20
Question 1 of 20

Match the fundamental atomic descriptors in List-I with their accurate mathematical derivations in List-II: List-I: A. Atomic Number (Z) B. Mass Number (A) C. Number of Neutrons List-II: 1. A minus Z 2. Protons plus Neutrons 3. Equals the number of Protons Choose the correct code:

Question 2 of 20

Assertion (A): Mixtures such as air or saltwater demand chemical reactions to separate their constituent parts. Reason (R): Mixtures are purely physical combinations where substances retain their individual chemical identities without forming fixed mass ratios.

Question 3 of 20

According to the principles of chemical sciences, which of the following best describes the core focus of Green Chemistry?

Question 4 of 20

The phenomenon of acid rain and its chemical processes within the natural ecosystem falls strictly under the domain of which discipline?

Question 5 of 20

Match the branches of chemistry in List-I with their specific area of study in List-II: List-I: A. Organic Chemistry B. Inorganic Chemistry C. Physical Chemistry List-II: 1. Study of Kinetics 2. Study of Carbon 3. Study of Ores Choose the correct code:

Question 6 of 20

What is formed when two or more atoms form chemical bonds with each other to create a single structural unit?

Question 7 of 20

Assertion (A): Elements are pure substances that consist of only a single type of atom. Reason (R): The atoms within an element share the exact same atomic number, retaining identical chemical properties.

Question 8 of 20

Which of the following statements fundamentally distinguishes a 'Compound' from other forms of matter?

Question 9 of 20

Air and saltwater are considered 'Mixtures' rather than compounds because:

Question 10 of 20

The nucleus lies at the very heart of the atom. Which two subatomic particles coexist within this incredibly dense region?

Question 11 of 20

Assertion (A): The nucleus of an atom remains intact despite the strong electrostatic repulsion between its positively charged protons. Reason (R): The nucleons are tightly bound together by strong nuclear forces, which overpower the electromagnetic repulsion.

Question 12 of 20

The total number of nucleons (protons plus neutrons) located in the nucleus constitutes which specific property of an atom?

Question 13 of 20

Which specific subatomic metric definitively identifies a chemical element and differentiates it from all other elements in the universe?

Question 14 of 20

Consider the spatial dynamics of electrons within an atom. How do they physically arrange themselves relative to the dense central nucleus?

Question 15 of 20

In chemical nomenclature, what is the specific term used to describe the absolute outermost electron shell of an atom?

Question 16 of 20

The concept of 'Valency' is central to understanding how elements react. How is valency scientifically defined?

Question 17 of 20

According to the Octet Rule, what is the ultimate thermodynamic goal that drives an atom to chemically bond by gaining, losing, or sharing electrons?

Question 18 of 20

Sodium (Na) has an atomic number of 11 and an electron configuration of 2, 8, 1. How does it actively achieve chemical stability?

Question 19 of 20

Isotopes are atoms of the exact same element that possess varying mass numbers. This specific variance in physical mass is fundamentally caused by:

Question 20 of 20

Carbon-12 and Carbon-14 are two well-known atomic structures. Which of the following accurately classifies their relationship?

More Basic Science Subtopics

Practice other subtopics under Basic Science to strengthen your CET 12th Level preparation.