Q21•Short Answer•[2 Marks]
A concave mirror is used in a makeup application. If the focal length of the mirror is 10 cm, what is the distance from the mirror to the object if the image is formed at 5 cm?
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Class 10 Science questions for CBSE
Curriculum-aligned Science questions for Class 10 under CBSE. Shortlist topics, practice at your pace, and make every answer count.
136questions available
Q22•Short Answer•[2 Marks]
In a lab, students are comparing the properties of metals and non-metals. Which non-metal property would they observe when conducting an experiment with sulfur?
Q23•Short Answer•[2 Marks]
A circuit consists of a battery and a resistor. If the current flowing through the circuit is 3 A, what is the electric current in terms of charge per unit time?
Q24•MCQ•[1 Mark]
What is a common characteristic of acids when they react with metals?
Q25•MCQ•[1 Mark]
Which indicator would you use to test for acidity in a solution?
Q26•MCQ•[1 Mark]
When hydrochloric acid reacts with sodium bicarbonate, what gas is produced along with sodium chloride and water?
Q27•MCQ•[1 Mark]
Which of the following is a common use of spherical mirrors in everyday life?
Q28•MCQ•[1 Mark]
Which formula relates the object distance, image distance, and focal length of a spherical mirror?
Q29•MCQ•[1 Mark]
What type of image is formed by a concave mirror when the object is placed between the focus and the mirror?
Q30•MCQ•[1 Mark]
What gas is released when dilute hydrochloric acid reacts with zinc?
Q31•MCQ•[1 Mark]
When magnesium burns in oxygen, what type of oxide is formed?
Q32•MCQ•[1 Mark]
Which of the following is a characteristic of metals?
Q33•MCQ•[1 Mark]
What occurs in the eye to allow a person to focus on objects at different distances?
Q34•MCQ•[1 Mark]
When white light passes through a glass prism, which phenomenon causes it to spread into a spectrum of colors?
Q35•MCQ•[1 Mark]
What is one practical application of concave mirrors in daily life?
Q36•MCQ•[1 Mark]
In humans, what is the primary function of the diaphragm during respiration?
Q37•MCQ•[1 Mark]
Which part of the human alimentary canal is primarily responsible for the absorption of nutrients?
Q38•MCQ•[1 Mark]
During photosynthesis, what is the primary source of energy used by plants to convert carbon dioxide and water into glucose?
Q39•MCQ•[1 Mark]
Which type of chemical reaction involves the combination of two or more substances to form a single product?
Q40•MCQ•[1 Mark]
Which of the following correctly represents the balanced equation for the combustion of methane (CH₄)?