Question 1
Which observation best indicates that a chemical reaction has taken place when zinc is added to dilute sulphuric acid?
Correct Answer:
Bubbles of a colourless gas form and the metal slowly disappears.
Question 2
The balanced equation for complete combustion of methane is CH₄ + 2O₂ → CO₂ + 2H₂O. How many moles of oxygen are needed for 3 moles of methane?
Correct Answer:
6 mol
Question 3
When silver chloride is exposed to sunlight, it turns grey. This reaction is an example of:
Correct Answer:
Photolytic decomposition
Question 4
In the reaction Fe₂O₃ + 2Al → Al₂O₃ + 2Fe, aluminium acts as:
Correct Answer:
A reducing agent
Question 5
If 4 g of hydrogen completely reacts with 32 g of oxygen to form water, the mass of water formed is:
Correct Answer:
36 g
Question 1
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Prepare with the RBSE Praveshika Science Practice Questions - Rajasthan RBSE Praveshika Science - Code 007 Exam practice quiz. This question bank includes 100 questions covering water, solution, human, reaction, and pure. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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RBSE Praveshika Science Practice Questions - Rajasthan RBSE Praveshika Science - Code 007 Exam

This practice set contains 100 questions from the matching question bank and focuses on water, solution, human, reaction, and pure. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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