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#1 Class 10 Science How do Organisms Reproduce? 2026 Long 1M CBSE

Assertion (A): Variations are not often seen in off-springs produced by asexual reproduction. Reason (R): DNA molecule generated by replication is not similar to the original DNA. Select the correct option.

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#2 Class 10 Science Life Processes 2026 Mcq 1M CBSE

In human beings the oxygen rich blood is pumped out to the body by:

A. contraction of right atrium

B. relaxation of left ventricle

C. contraction of right ventricle

D. contraction of left ventricle

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#3 Class 10 Science Heredity 2026 Mcq 1M CBSE

Two pea plants, one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds were crossed with each other which produced $F_1$ progeny that have only round yellow (RrYy) seeds. When $F_1$ plants are...

A. (i) and (ii)

B. (i) and (iv)

C. (ii) and (iv)

D. (i) and (iii)

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#4 Class 10 Science Control and Coordination 2026 Mcq 1M CBSE

Following are the statements about the different parts of the brain. Select the correct statements. (i) The thinking part of the brain is the forebrain. (ii) Centres for smell, hearing, memory, sight are located in fo...

A. (i), (ii) and (iii)

B. (ii), (iii) and (iv)

C. (i), (ii) and (iv)

D. (i), (iii) and (iv)

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#5 Class 10 Science Heredity 2026 Mcq 1M CBSE

Identify the traits that cannot be transmitted from parents to the off-springs: (i) Swimming technique (ii) Blood group (iii) Eye colour (iv) Dancing skills

A. (i) and (ii)

B. (i) and (iv)

C. (iii) and (iv)

D. (ii) and (iii)

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#6 Class 10 Science Our Environment 2026 Mcq 1M CBSE

Given below are some of the statements regarding our environment: (i) Change in our life-styles have resulted in greater amounts of waste material generation. (ii) Changes in attitude have resulted in use of more disp...

A. (i), (ii), (iii)

B. (iv)

C. (i) and (iii)

D. (ii) and (iv)

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#7 Class 10 Science How do Organisms Reproduce? 2026 Mcq 1M CBSE

If the part 'P' of the flower is removed, which of the following processes will not take place? [Figure: longitudinal section of a flower showing stamens (anther and filament), pistil with ovules, and the label 'P' po...

A. Formation of pollens

B. Formation of flower

C. Formation of fruit

D. Formation of seed

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#8 Class 10 Science Life Processes 2026 Mcq 1M CBSE

Observe the given figure and select the statement that correctly states how these fungi obtain nutrition. [Figure: bread mould (Rhizopus) growing on a slice of bread, with the fungal body and the bread labelled]

A. By eating the bread on which it is growing.

B. By using nutrients from the bread to prepare their own food.

C. By breaking down the nutrients of bread outside the body and then absorbing them.

D. By allowing other organisms to grow on the bread and then consuming them.

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#9 Class 10 Science Chemical Reactions and Equations 2026 Short 3M CBSE

Answer the following: (a) Write two observations when green coloured crystals of ferrous sulphate are heated in a boiling tube. (b) Why brown coloured copper powder turns black on heating? (c) What happens when limest...

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#10 Class 10 Science Chemical Reactions and Equations 2026 Short 3M CBSE

Answer the following: (a) Identify the substance oxidized and the substance reduced in the following reaction: $$4Na + O_2 \longrightarrow 2Na_2O$$ (b) What type of reaction occurs when Lead (II) nitrate solution is m...

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#11 Class 10 Science Acids, Bases and Salts 2026 Short 2M CBSE

Write the balanced chemical equation for the preparation of: (a) Sodium hydroxide by electrolysis of brine solution (b) Sodium carbonate

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#12 Class 10 Science Acids, Bases and Salts 2026 Short 2M CBSE

Write the balanced chemical equations involved in the preparation of (a) Bleaching powder (b) Baking soda

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#13 Class 10 Science Carbon and its Compounds 2026 Long 5M CBSE

(i) How would you name the following: I. $CH_3-CH_2-CHO$ II. $CH_3-C \equiv CH$ (2) (ii) When ethanol reacts with ethanoic acid in the presence of conc. $H_2SO_4$, a substance with sweet smell is produced. Answer the ...

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#14 Class 10 Science Carbon and its Compounds 2026 Long 5M CBSE

(i) Carbon cannot form $C^{4+}$ cation and $C^{4-}$ anion. Explain. (2) (ii) Define homologous series of carbon compounds. Why are the melting and boiling points of $C_4H_{10}$ higher than $C_3H_8$ or $C_2H_6$? (2) (i...

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#15 Class 10 Science Acids, Bases and Salts 2026 Long 4M CBSE

Read the following passage and answer the questions that follow: The pH plays an important role in our daily life. Strength of acids and bases depends on the number of $H^+$ ions and $OH^-$ ions produced by these resp...

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#16 Class 10 Science Acids, Bases and Salts 2026 Long 4M CBSE

Read the following passage and answer the questions that follow: The pH plays an important role in our daily life. Strength of acids and bases depends on the number of $H^+$ ions and $OH^-$ ions produced by these resp...

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#17 Class 10 Science Metals and Non-metals 2026 Short 3M CBSE

(i) Write all the reactions involved in the extraction of Zn from ZnS. (2) (ii) Hydrogen gas is not evolved when most of the metals react with nitric acid. Give reason. (1)

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#18 Class 10 Science Metals and Non-metals 2026 Short 3M CBSE

(i) Which method will be used to convert each of them to their respective metal oxides? (a) Carbonate ore (b) Sulphide ore (ii) Write a chemical reaction to illustrate the use of aluminium for joining cracked railway ...

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#19 Class 10 Science Chemical Reactions and Equations 2026 Short 3M CBSE

Account for the following: (a) White silver chloride turns grey when exposed to sunlight. (b) Lead (II) nitrate on heating releases brown fumes. (c) Bags of oil and fat containing food items are flushed with nitrogen ...

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#20 Class 10 Science Acids, Bases and Salts 2026 Short 2M CBSE

(a) A compound 'A' is used in soda-acid fire-extinguisher and decomposes on heating to form compound 'B'. Compound 'B' is used for removing permanent hardness of water. Identify 'A' and 'B'. (1) (b) Write chemical for...

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