General
CBSE Class 10 Science · every board question from this chapter, 2022–2026
- Four chambered heart is a characteristic of:2026
- Assertion: Natural replenishment of soil will not take place in absence of microbes. Reason (R): Microbes, comprising of bacteria…2026
- Assertion: The peristaltic movements occur all along the gut. Reason (R): The lining of the gut has muscles that contract…2026
- Suggest one precaution to be taken before disposing of the following: Sewage from homes Industrial wastes2026
- Briefly mention the steps in double-circulation through human heart.2026
- A couple are parents to 4 daughters in a sequence, and do not have any son. Does this indicate that the husband does not produced…2026
- The volume ratio of hydrogen and oxygen gases liberated during electrolysis of water is2026
- The volume ratio of hydrogen and oxygen gases liberated during electrolysis of water is:2026
- In the following equation x KI+H_2 O_2 → I_2+y KOH x and y respectively are:2026
- The reaction of calcium with cold water is:2026
- Which of the following will not undergo addition reaction?2026
- Which of the following is a poor conductor of electricity?2026
- Attempt either or: How does the focal length of eye lens change as the distance of the object from the eyes is altered? Explain.…2026
- Select saponification reaction from the following:2024
- Which one of the following statements is NOT true?2024
- In the given diagram the leaf shown belongs to which plant?2024
- Chromosomes: (i) carry hereditary information from parents to the next generation. (ii) are thread like structures located inside…2024
- United Nations Environment Programme forged an agreement to2024
- Which one of the following organism is represented by this diagram?2024
- to 20 consists of two statements - Assertion and Reason (R), answer these questions selecting the appropriate option given below:2024
- to 20 consists of two statements - Assertion and Reason (R), answer these questions selecting the appropriate option given below:2024
- We water the soil but it reaches the topmost leaves of the plants. Explain in brief the process involved.2024
- During electrolysis of water, if the volumes of oxygen and hydrogen evolved at the electrodes are V_O and V_H respectively, then…2023
- The bacterial and the viral infections that may be caused due to unsafe sex respectively are:2023
- The expressions that relate (i) Q, I and t and (ii) Q, V and W respectively are (Here the symbols have their usual meanings):2023
- What is the other name of'tissue fluid'? Write its two functions.2023
- Copper reacts with a moist gas 'A' in the air and slowly loses its shiny brown surface. It turns green. Identify 'A' and the…2023
- A substance 'X' is used as a building material and is insoluble in water. When it reacts with dil. HCl, it produces a gas which…2023
- Name the process shown below and define it: Name the types of cells present in the organisms which exhibit this process.2022
- A part of modern periodic table is given below. On its basis, answer the following questions: 1/2 × 4=2 Write the molecular…2022
- What is a Döbereiner triad? Why can't the following three elements form such a triad? N(14); P(31); As(75) (Atomic masses are…2022
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