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#1 Class 10 Science Life Processes 2026 Mcq 1M CBSE
The following events occur during the process of photosynthesis. Choose the option that indicates the correct events. (i) Oxidation of carbon dioxide to carbohydrates (ii) Conversion of light energy into chemical ener...
A. (i) and (ii)
B. (ii) and (iii)
C. (iii) and (iv)
D. (i) and (iv)
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#2 Class 10 Science Life Processes 2026 Mcq 1M CBSE
Select the option that represents the correct balanced equation for the process of photosynthesis :
A. $CO_2 + O_2 + H_2O \xrightarrow{Chlorophyll} C_6H_{12}O_6 + H_2O$
B. $6CO_2 + 6H_2O \xrightarrow[Sunlight]{Chlorophyll} C_6H_{12}O_6 + O_2$
C. $CO_2 + H_2O \xrightarrow{Sunlight} C_6H_{12}O_6$
D. $6CO_2 + 12H_2O \xrightarrow[Sunlight]{Chlorophyll} C_6H_{12}O_6 + 6O_2 + 6H_2O$
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#3 Class 10 Science Heredity 2026 Mcq 1M CBSE
The genotype of green stemmed tomato plant is denoted by 'GG' and that of purple stemmed tomato plant as 'gg'. Hybrid of a cross between these two were self-pollinated to obtain $F_2$ progeny. What will be the ratio o...
A. 2 : 1 : 1
B. 3 : 1 : 0
C. 1 : 1 : 2
D. 1 : 2 : 1
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#4 Class 10 Science Control and Coordination 2026 Mcq 1M CBSE
Identify the type of tropic movement that is responsible for the movement of the pollen tube towards an ovule from the following options.
A. Hydrotropism
B. Geotropism
C. Chemotropism
D. Phototropism
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#5 Class 10 Science How do Organisms Reproduce? 2026 Mcq 1M CBSE
Spirogyra, despite being a multi-cellular organism, still shows a simple reproductive method. Select the correct option with regard to reproduction in Spirogyra :
A. Asexual reproduction by division of cells into two cells
B. Sexual reproduction by division of cells into many cells
C. Asexual reproduction by breaking up of Spirogyra filaments into smaller parts
D. Sexual reproduction by the formation of gametes after meiosis of cells of filaments followed by fusion of male and female gametes
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#6 Class 10 Science Life Processes 2026 Mcq 1M CBSE
The carbohydrates, which are not used immediately in plants, are stored in the form of 'a', which serves as an internal energy reserve. What does 'a' stand for ?
A. Starch
B. Sugar
C. Fat
D. Protein
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#7 Class 10 Science Carbon and its Compounds 2026 Long 5M CBSE
(i) Write the structural formula of benzene. (ii) State the reason why carbon can neither form $C^{4+}$ cation nor $C^{4-}$ anion. (iii) What type of bond is formed between carbon and hydrogen ? (iv) How is ethanol co...
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#8 Class 10 Science Carbon and its Compounds 2026 Long 5M CBSE
A carbon compound 'P' of molecular formula $C_2H_6O$ is found to be neutral when tested with red and blue litmus. A gas that burns with a pop sound is produced when sodium metal reacts with compound 'P'. (i) Identify ...
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#9 Class 10 Science Acids, Bases and Salts 2026 Long 4M CBSE
Read the following passage and answer the questions that follow : In the given diagram, when electricity is passed through an aqueous solution of a common salt (brine), a substance 'Z' is produced, along with the evol...
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#10 Class 10 Science Metals and Non-metals 2026 Short 3M CBSE
Seema took a small amount of copper powder in a china dish and heated it. What changes will she observe on heating ? When $H_2$ gas is passed over this heated substance, what visible changes will be seen in it ? Give ...
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#11 Class 10 Science Chemical Reactions and Equations 2026 Short 3M CBSE
Define the following terms : (a) Corrosion (b) Rancidity (c) Double displacement reaction
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#12 Class 10 Science Metals and Non-metals 2026 Short 3M CBSE
Answer the following : (a) Why can the oxides of highly reactive metals not be reduced by carbon ? (b) Why do ionic compounds have high melting and boiling points ? (c) Why is a solder, an alloy of lead and tin, used ...
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#13 Class 10 Science Metals and Non-metals 2026 Short 3M CBSE
Give reasons : (i) Metal sulphides and carbonates should be converted to their metal oxides in the process of extraction of metals. (ii) Aluminium oxide is considered as an amphoteric oxide. (iii) Metals like Na, K, C...
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#14 Class 10 Science Metals and Non-metals 2026 Short 3M CBSE
(i) Write one example each of one metal that is so soft that it can be cut with a knife, and one non-metal that is a good conductor of electricity. (ii) Using the electronic configuration, explain how Mg atom combines...
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#15 Class 10 Science Metals and Non-metals 2026 Short 2M CBSE
Read the following passage and answer the questions that follow : One student was comparing the reactivity of different metals for his science project. He added iron filings in four test tubes A, B, C and D containing...
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#16 Class 10 Science Chemical Reactions and Equations 2026 Short 2M CBSE
Answer the following : (a) Why should chemical equations be balanced ? (b) Name the oxidising and reducing agent in the following equation : $$ 4Na + O_2 \rightarrow 2Na_2O $$
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#17 Class 10 Science Metals and Non-metals 2026 Short 2M CBSE
Write balanced equations for the reactions of the following : (a) Iron with steam (b) Calcium with water
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#18 Class 10 Science Carbon and its Compounds 2026 Long 1M CBSE
Assertion (A) : Carbon shows the property of catenation. Reason (R) : $C - C$ bond is weak due to its small size.
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#19 Class 10 Science Carbon and its Compounds 2026 Long 1M CBSE
Assertion (A) : Carbon compounds can form chains, branched and ring structures. Reason (R) : Carbon exhibits the property of catenation.
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#20 Class 10 Science Carbon and its Compounds 2026 Long 1M CBSE
Assertion (A) : Carbon shows the property of catenation. Reason (R) : This is due to strong C - C bond.
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