Basic Science MCQs for LDC
Practice 20 free basic science multiple choice questions for LDC exam. Instant answers with explanations in Hindi and English.
Strengthen your Basic Science knowledge for LDC with our free curated MCQ set. Every question follows real Rajasthan exam patterns. Switch between Hindi and English, and practice daily to build confidence before the exam.
LDC — Basic Science
20 Questions • Instant results & explanations • Hindi & English
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Question 1 of 20
Which experiment led to the discovery of the electron?
Question 2 of 20
Which of the following designations represents the energy levels or shells in Bohr's atomic model?
Question 3 of 20
How is plasma formed inside a fluorescent tube or neon sign bulb?
Question 4 of 20
Which of the following is the most abundant isotope of Hydrogen in nature (99.98%)?
Question 5 of 20
Which of the following physical and chemical traits accurately describes an acidic substance?
Question 6 of 20
What is the primary function of the bicarbonate buffering system in the human body?
Question 7 of 20
Which of the following statements strictly defines the chemical process of 'Rusting'?
Question 8 of 20
Which type of lens is used to correct Myopia (Near-sightedness)?
Question 9 of 20
Which of the following statements about 'Elements' is correct?
Question 10 of 20
Match the following Solar Projects with their Locations: List-I (Project) I. Bhadla Solar Park II. Nokh Solar Park III. Pugal Solar Project IV. Fatehgarh Solar Park List-II (District) 1. Bikaner 2. Jaisalmer (Fatehgarh) 3. Jodhpur (Phalodi) 4. Jaisalmer (Nokh)
Question 11 of 20
During the thermal decomposition of baking soda, which specific gas is released that is fundamentally responsible for making cakes soft and fluffy?
Question 12 of 20
A quantum mechanical phenomenon where certain materials exhibit strictly zero electrical resistance and perfect diamagnetism when cooled below a critical temperature is known as:
Question 13 of 20
Which of the following statements correctly compares the installed solar capacity of Rajasthan and Gujarat (as of 2025)?
Question 14 of 20
Which of the subatomic particles listed below is characterized by carrying absolutely no electrical charge, rendering it electrically neutral?
Question 15 of 20
Which technique correctly defines 'Galvanization' used for preempting the rusting of iron?
Question 16 of 20
Match the specific optical application listed in List-I with the corresponding type of optical lens or mirror prescribed in List-II: List-I P. Corrective lens for Myopia (Near-sightedness) Q. Rear-view mirror for automobiles R. Magnifying mirror for dentists List-II 1. Concave mirror 2. Concave lens 3. Convex mirror
Question 17 of 20
During the chemical synthesis of soap via the saponification of fats and oils with a strong alkali, which highly valuable organic compound is invariably produced alongside the soap as a secondary byproduct?
Question 18 of 20
Match List I (Mathematical Optic Notations) with List II (Physical Quantity) and select the correct option: List-I a. u b. v c. f d. hi List-II 1. Height of the image 2. Object distance 3. Image distance 4. Focal length
Question 19 of 20
When standing in front of a standard plane mirror, the image formed possesses specific characteristics. Which of the following lists accurately describes this image?
Question 20 of 20