Practice Basic Science under Science & Tech for Rajasthan SI with 20 free MCQs in Hindi and English.
Rajasthan SI — Basic Science
20 Questions • Instant results & explanations • Hindi & English
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Question 1 of 20
Which branch of physics is described as a 'high-yield topic' that involves the study of light, its properties, and optical instruments?
Question 2 of 20
Hydrocarbons and their vast array of structural derivatives are exclusively and comprehensively studied under which primary branch of chemistry?
Question 3 of 20
Consider the following examples:
1. Tearing of paper
2. Making jewelry from gold
3. Breaking of a glass tumbler
All of the above are examples of:
Question 4 of 20
Regarding basic buffers, which of the following statements is categorically correct?
Question 5 of 20
Which property allows aquatic animals to breathe underwater?
Question 6 of 20
By approximately how much does the speed of sound increase in air for every 1°C rise in temperature?
Question 7 of 20
The sharp, distinct outlines of shadows cast by objects and the formation of astronomical eclipses are direct physical evidence of which property of light?
Question 8 of 20
Modern global telecommunications rely heavily on underground optical fibers to transmit massive amounts of internet data at the speed of light. Which of the following strict optical conditions is an absolute scientific prerequisite for these fibers to function successfully?
Question 9 of 20
Assertion (A): X-rays are highly effective for mapping the intricate soft tissue networks within the human brain.
Reason (R): X-rays consist of high-frequency electromagnetic waves that are primarily absorbed by dense structures.
Question 10 of 20
What is the main reason for the incompressibility of solids?
Question 11 of 20
Electricity (Vidyut) forms the backbone of several administrative exams. Which of the following best defines its scope?
Question 12 of 20
Which of the following represents the correct characteristic properties of a base?
Question 13 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 14 of 20
Which of the following statements fundamentally distinguishes a 'Compound' from other forms of matter?
Question 15 of 20
Within the complex structural architecture of a cleansing micelle, what is the specific and vital physical function performed by the hydrophobic hydrocarbon tails of the aggregated soap molecules?
Question 16 of 20
What primary scientific phenomenon does the systematic grid arrangement of the Modern Periodic Table visually explain and highlight?
Question 17 of 20
Which of the following describes the nature of the image formed when an object is placed in front of a mirror whose reflecting surface is a segment of an outwardly bulging hollow sphere?
Question 18 of 20
Select the correct combination regarding the nature of changes:
1. Melting of butter
2. Fermentation
3. Rusting
4. Magnetization of iron
Question 19 of 20
Which of the following is NOT a property of a mixture?
Question 20 of 20
Why does a solid maintain its shape when subjected to external force?
