Chemistry (basic reactions) MCQs for RAS
Practice 20 free chemistry (basic reactions) multiple choice questions for RAS exam. Instant answers, explanations in Hindi and English, and topic-wise targeted practice.
Master Chemistry (basic reactions) under Basic Science for RAS with our curated MCQ set. Every question is sourced from real Rajasthan exam patterns and updated regularly. Switch between Hindi and English anytime. Use this daily to strengthen weak areas before the exam.
RAS — Basic Science — Chemistry (basic reactions)
20 Questions • Instant results & explanations • Hindi & English
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Question 1 of 20
The highly corrosive chemical mixture known as 'Aqua Regia', capable of dissolving noble metals, is formulated using specific concentrated acids. What is its exact volumetric composition?
Question 2 of 20
Assertion (A): The weight of an iron nail decreases immediately upon the onset of rusting. Reason (R): Rusting is a destructive redox reaction that erodes the pure metallic structure.
Question 3 of 20
The formulation of critical life-saving drugs often begins with small-scale discoveries in laboratories. However, scaling up these precise chemical reactions to massive manufacturing plants for public distribution is the primary technical focus of:
Question 4 of 20
Terrestrial life on Earth is inherently and profoundly carbon-based. Consequently, the dedicated scientific study of these complex carbon-containing compounds and their diverse chemical derivatives is academically known as:
Question 5 of 20
The Debari Zinc Smelter in Udaipur specifically processes concentrated ore extracted from which famous mines?
Question 6 of 20
What is the pH value of a perfectly neutral solution, such as pure water, on the standard pH scale?
Question 7 of 20
Consider the following statements regarding the physical states and properties of chemical compounds: 1. Ionic compounds generally exist as liquids or gases at room temperature. 2. Covalent compounds possess significantly lower melting points compared to ionic compounds. 3. Ionic compounds conduct electricity when dissolved in an aqueous state due to the liberation of mobile ions. Which of the statements given above are conceptually accurate?
Question 8 of 20
Which of the following compounds is also known as Sodium Hydrogencarbonate?
Question 9 of 20
Identify the correct chemical reaction equation that illustrates the formation of scum when traditional soap reacts with hard water.
Question 10 of 20
An atomic nucleus is described as being 'immensely dense'. What does this imply about its spatial configuration in relation to the overall atom?
Question 11 of 20
Which of the following accurately represents the elemental composition of the standard alloy 'Brass'?
Question 12 of 20
Consider the following statements regarding the behavior of acids and bases in water: 1. Strong acids like Sulfuric acid ionize completely. 2. Weak bases like Ammonium hydroxide undergo complete ionization. 3. Acetic acid is an example of an acid that ionizes only partially. Which of the statements given above is/are correct?
Question 13 of 20
Which of the following formula groups is characteristic of a synthetic detergent?
Question 14 of 20
Consider the following statements: I. Detergents contain formula groups like -SO3Na+ or -OSO3Na+. II. Some detergents are non-biodegradable and can cause severe water pollution. Which of the above statements is/are correct?
Question 15 of 20
The comprehensive study of endothermic and exothermic reactions, along with the detailed calculations of latent heat, is primarily focused within:
Question 16 of 20
When traditional soap is introduced to hard water, an aggressive chemical reaction occurs that forms a highly insoluble precipitate known as 'scum'. Which specific type of reaction is this?
Question 17 of 20
Consider the following chemicals: 1. Saccharin 2. Aspartame 3. Sucralose 4. Butylated Hydroxytoluene Which of the above are classified strictly as artificial sweeteners?
Question 18 of 20
When highly corrosive hydrochloric acid (HCl) thoroughly interacts with caustic sodium hydroxide (NaOH), what distinct and stable chemical products are invariably synthesized?
Question 19 of 20
Which of the following compounds is chemically characterized by the functional group -COONa+?
Question 20 of 20