Chemistry (basic reactions) MCQs for RAS
Practice 20 free Chemistry (basic reactions) questions under Basic Science — Science & Tech.
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RAS — Basic Science — Chemistry (basic reactions)
20 Questions • Instant results & explanations • Hindi & English
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Question 1 of 20
What is the primary objective of measuring the Cetane Rating in internal combustion engine fuels?
Question 2 of 20
Consider the following statements regarding the environmental impact of cleaning agents: I. All sodium/potassium salts of carboxylic acids are highly biodegradable. II. Detergents with heavily branched alkyl sulfates persist in water bodies and cause severe pollution. Which of the statements given above is/are correct?
Question 3 of 20
Which specific microscopic structural feature is profoundly responsible for liquid water exhibiting an anomalously high boiling point when systematically compared to structurally similar molecular hydrides?
Question 4 of 20
Potash Alum (commonly known as Phitkari) is frequently tested in applied general science examinations. Chemically, what category of substance does Potash Alum belong to?
Question 5 of 20
To effectively combat climate change, scientists must study the atmospheric residence times and chemical breakdown mechanisms of specific insulating molecules. This critical task forms a major component of:
Question 6 of 20
Aluminum is a vital industrial metal extracted primarily from its ores. According to its complex chemical composition, what is the precise formula for Kaolinite?
Question 7 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 8 of 20
In industrial chemistry, the potent fuel mixture universally identified as 'Producer Gas' consists primarily of which two gaseous components?
Question 9 of 20
In the most advanced tiers of state administrative main examinations, candidates are expected to perform deep analytical writing on complex applied chemistry topics. Which specific set of topics is universally designated for these rigorous, high-mark evaluations?
Question 10 of 20
Consider the following chemical transformations: I. CaC2 + 2H2O → Ca(OH)2 + C2H2 II. 2NaHCO3 → Na2CO3 + H2O + CO2 Which of the following accurately describes the primary commercial application of the gases generated in reactions I and II respectively?
Question 11 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 12 of 20
Match List-I (Branch of Chemistry) with List-II (Core Focus Area): List-I a. Physical Chemistry b. Biochemistry c. Environmental Chemistry d. Industrial Chemistry List-II 1. Cellular respiration and DNA structure 2. Thermodynamics and chemical kinetics 3. Scale-up of fertilizer and synthetic fiber manufacturing 4. Pollution, greenhouse gases, and green chemistry Choose the correct option:
Question 13 of 20
Physical chemistry bridges classical physics with chemical reactions to explain exactly why and how quickly a reaction occurs. Which of the following represents one of the three core scientific pillars of physical chemistry?
Question 14 of 20
What is the primary scientific motivation that drives an atom to gain, lose, or covalently share its valence electrons with other atoms?
Question 15 of 20
Metallurgy is the complex science and technology concerned with extracting metals safely from their raw ores and subsequently modifying them for use. Scientifically, this entire domain is deeply rooted within the principles of:
Question 16 of 20
When Calcium carbide is exposed to atmospheric moisture for the artificial ripening of fruits, it undergoes a hydrolysis reaction. Which of the following equations accurately represents this process?
Question 17 of 20
Match the fundamental subatomic particles with their respective electrical charges: List-I (Particle): A. Proton B. Neutron C. Electron List-II (Charge): 1. Negative 2. Positive 3. Neutral (Zero charge) Choose the correct code:
Question 18 of 20
Given below are two statements, one labeled as Assertion (A) and the other as Reason (R): Assertion (A): Sodium Benzoate is highly favored for preserving carbonated drinks and fruit jams. Reason (R): It acts as an artificial sweetener to maintain strict calorie control in these products. In the context of the above two statements, which one of the following is correct?
Question 19 of 20
Which of the following generic chemical equations represents a Combination reaction?
Question 20 of 20