New Exam Prep
Full explanation, worked examples & memory tricks in the app
🎯 Exam Preparation Kit
New Exam Prep
English 21 leveled MCQs Free
Shared by a Veda learner · Generated with Veda AI
Smart notes
1
What you'll study, topic by topic
Solved paper preview
Sample questions with model answers
Every question in the paper gets a full exam-length answer in the app — organised by marks, the way a topper writes it.
5 marks Long answer
A convex mirror used for rear-view on an automobile has a radius of curvature of 3.00m. If a bus is located at 5.00m from this mirror, find the position, nature and size of the image.
Show answer outline
Using the mirror formula, the image position is at 1.5m behind the mirror, the nature is virtual, and the size is reduced.
The full exam-length answer is in the app.
5 marks Long answer
Explain the process of nutrition in Amoeba.
Show answer outline
Amoeba uses phagocytosis to engulf food particles, forming a food vacuole where digestion occurs.
The full exam-length answer is in the app.
5 marks Long answer
Explain the circulation path of blood in human heart.
Show answer outline
Blood circulates through the heart via the right atrium, right ventricle, lungs, left atrium, left ventricle, and out to the body.
The full exam-length answer is in the app.
5 marks Long answer
Explain human respiratory system.
Show answer outline
The human respiratory system consists of the nasal cavity, trachea, bronchi, and lungs, facilitating gas exchange.
The full exam-length answer is in the app.
5 marks Long answer
Draw a neat and labeled diagram of human eye. Explain its different parts with functions.
Show answer outline
The human eye diagram includes the cornea, lens, retina, and pupil, each serving key roles in vision.
The full exam-length answer is in the app.
5 marks Long answer
State causes of myopia. How is this defect corrected? Draw suitable diagram to show it.
Show answer outline
Myopia is caused by an elongated eyeball; it is corrected using concave lenses.
The full exam-length answer is in the app.
4 marks Medium answer
(a) Why should curd and sour substances not to be kept in brass and copper vessels?
Show answer outline
Curd and sour substances can react with brass and copper, leading to the formation of harmful compounds.
The full exam-length answer is in the app.
4 marks Medium answer
(b) Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas?
Show answer outline
Hydrogen gas is liberated; e.g., Zn + HCl → ZnCl$_2$ + H$_2$. It can be tested using a litmus paper or a burning splint.
The full exam-length answer is in the app.
4 marks Medium answer
(a) What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
Show answer outline
Trophic levels represent the position of organisms in a food chain; e.g., Grass (1st) → Rabbit (2nd) → Fox (3rd).
The full exam-length answer is in the app.
4 marks Medium answer
(b) What is ozone and how does it affect any ecosystem?
Show answer outline
Ozone (O$_3$) protects ecosystems by absorbing harmful UV radiation, preventing damage to living organisms.
The full exam-length answer is in the app.
3 marks Medium answer
What is combination reaction? Explain it with examples.
Show answer outline
A combination reaction is a chemical reaction where two or more substances combine to form a single product, e.g., A + B → AB.
The full exam-length answer is in the app.
3 marks Medium answer
Explain the importance of pH in food digestion.
Show answer outline
pH is crucial in digestion as it affects enzyme activity; for example, stomach acid (pH 1.5-3.5) aids in protein digestion.
The full exam-length answer is in the app.
3 marks Medium answer
(b) Show the formation of Na$_2$O and MgO by the transfer of electrons.
Show answer outline
Na$_2$O forms by 2Na → 2Na$^+$ + O + 2e$^-$; MgO forms by Mg → Mg$^{2+}$ + O + 2e$^-$.
The full exam-length answer is in the app.
3 marks Medium answer
Explain thermit process.
Show answer outline
The thermit process involves a reaction between aluminum powder and metal oxides, producing molten metal and aluminum oxide.
The full exam-length answer is in the app.
3 marks Medium answer
Explain reflex arc. Explain spinal reflex.
Show answer outline
A reflex arc is the neural pathway that mediates a reflex action; spinal reflex is an involuntary response to stimuli processed in the spinal cord.
The full exam-length answer is in the app.
3 marks Medium answer
Explain : Human brain.
Show answer outline
The human brain is the control center of the body, responsible for processing sensory information, coordinating movement, and enabling cognition.
The full exam-length answer is in the app.
2 marks Short answer
What is corrosion? Mention two ways to prevent corrosion.
Show answer outline
Corrosion is the gradual destruction of materials, usually metals, due to chemical reactions; prevention methods include galvanization and painting.
The full exam-length answer is in the app.
2 marks Short answer
(a) Write the electron-dot structures for sodium, oxygen and magnesium.
Show answer outline
Sodium: Na•, Oxygen: :O:, Magnesium: Mg•.
The full exam-length answer is in the app.
2 marks Short answer
(c) What are the ions present in Na$_2$O and MgO compounds.
Show answer outline
Na$_2$O contains Na$^+$ and O$^{2-}$ ions; MgO contains Mg$^{2+}$ and O$^{2-}$ ions.
The full exam-length answer is in the app.
2 marks Short answer
Name the type of mirror used in the following situations :- (a) Headlights of a car (b) Rear-view mirror of a vehicle (c) Solar furnace.
Show answer outline
a) Concave mirror; b) Convex mirror; c) Concave mirror.
The full exam-length answer is in the app.
2 marks Short answer
Write a short note on Bleaching powder.
Show answer outline
Bleaching powder (Ca(OCl)$_2$) is used as a bleaching agent and disinfectant, effective against bacteria and stains.
The full exam-length answer is in the app.
Study it properly — free, in the app
The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.