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#1 Class 10 Science Life Processes 2026 Short 2M CBSE
What kind of respiration provides more energy and why ?
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#2 Class 10 Science Our Environment 2026 Short 2M CBSE
(i) Chlorofluorocarbons (CFCs) have been linked to depletion of ozone layer. In 1987, the United Nations Environment Programme (UNEP) succeeded in making an agreement. State this agreement. (ii) What is the role of oz...
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#3 Class 10 Science Control and Coordination 2026 Short 2M CBSE
What are hormones ? State any one function of the following hormones : (i) Insulin (ii) Adrenaline
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#4 Class 10 Science Our Environment 2026 Long 1M CBSE
Assertion (A) : Ozone ($O_3$) gas at higher levels of atmosphere is a product of UV radiation acting on Oxygen ($O_2$). Reason (R) : The amount of ozone in the atmosphere began to drop sharply in 1980s.
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#5 Class 10 Science Life Processes 2026 Long 1M CBSE
Assertion (A) : The basic filtration unit in the kidneys, like in the lungs, is a cluster of very thin-walled blood capillaries. Reason (R) : Each capillary cluster in the kidney is associated with the cup-shaped end ...
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#6 Class 10 Science Our Environment 2026 Long 1M CBSE
Assertion (A) : Natural replenishment of soil will not take place in absence of microbes. Reason (R) : Microbes, comprising of bacteria and fungi, break down dead remains and waste products of organisms, and they go i...
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#7 Class 10 Science Life Processes 2026 Long 1M CBSE
Assertion (A) : Arteries have valves as they have to withstand high pressure. Reason (R) : Arteries are vessels which carry blood away from the heart to various organs.
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#8 Class 10 Science How do Organisms Reproduce? 2026 Mcq 1M CBSE
The number of chromosomes in parents and offspring of a particular species undergoing sexual reproduction remains constant due to :
A. doubling of chromosomes after zygote formation.
B. halving of chromosomes after zygote formation.
C. doubling of chromosomes before gamete formation.
D. halving of chromosomes at the time of gamete formation.
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#9 Class 10 Science Control and Coordination 2026 Mcq 1M CBSE
In plants, the role of cytokinin is to/in :
A. promote cell division
B. wilting of leaves
C. promote opening of stomatal pore
D. growth of stem
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#10 Class 10 Science Control and Coordination 2026 Mcq 1M CBSE
In a synapse, the chemical signal is transmitted from :
A. Dendritic end of one neuron to axonal end of another neuron.
B. Axon to cell body of the same neuron.
C. Cell body to axonal end of the same neuron.
D. Axonal end of one neuron to dendritic end of another neuron.
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#11 Class 10 Science Control and Coordination 2026 Mcq 1M CBSE
Walking in a straight line and riding a bicycle are activities which are possible due to coordination of which part of the brain ? (Part of the Brain / Name of the area of the Brain)
A. Fore-Brain / Cerebrum
B. Mid-Brain / Cerebellum
C. Hind-Brain / Cerebellum
D. Hind-Brain / Medulla
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#12 Class 10 Science How do Organisms Reproduce? 2026 Mcq 1M CBSE
The sexually transmitted disease caused by bacteria is :
A. Diarrhoea
B. AIDS
C. Gonorrhoea
D. Wart
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#13 Class 10 Science How do Organisms Reproduce? 2026 Mcq 1M CBSE
Which of the following represents the correct sequence of events of sexual reproduction in a flower ?
A. Pollination, Fertilization, Seed, Embryo
B. Seed, Embryo, Fertilization, Pollination
C. Seed, Plant, Flower, Pollination, Fertilization
D. Pollination, Fertilization, Embryo, Seed
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#14 Class 10 Science Our Environment 2026 Mcq 1M CBSE
In accumulation of toxic substances at higher trophic levels of an ecosystem through the food chain, which of the following organisms is affected the most ?
A. Small aquatic plants
B. Human beings
C. Small fish
D. Large fish
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#15 Class 10 Science Life Processes 2026 Mcq 1M CBSE
Observe the figure given below and identify the incorrect step for the activity set-up : [Figure: Two potted plants (I) and (II) covered with separate bell-jars; jar (I) contains a watch-glass with potassium hydroxide...
A. Both plants are kept in the dark room for three days before placing them in separate glass jars.
B. Both plants are covered with separate wooden bell-jars.
C. Use vaseline to seal the bottom of the jars with the glass plates.
D. Both potted plants were kept in sunlight for a few hours before the iodine test for the presence of starch.
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#16 Class 10 Science Our Environment 2026 Mcq 1M CBSE
Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level form the :
A. Food web
B. Ecosystem
C. Ecological pyramid
D. Food chain
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#17 Class 10 Science Life Processes 2026 Mcq 1M CBSE
Pravin was given a list of characteristics associated with the process of anaerobic respiration in humans, in the table given below : Location Condition End Product Characteristic (i) Muscle Cell (ii) Requires presenc...
A. (i) and (ii)
B. (i) and (iii)
C. (ii) and (iii)
D. (i) only
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#18 Class 10 Science Control and Coordination 2026 Mcq 1M CBSE
The growth of tendrils in grapes plants is due to :
A. Effect of light
B. Effect of gravity
C. Rapid cell division in tendril cells in contact with the support
D. Rapid cell division in tendril cells that are away from the support
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#19 Class 10 Science Carbon and its Compounds 2026 Long 5M CBSE
Attempt either (a) or (b) : (a) (i) What is homologous series ? Which two of the following organic compounds belong to the same homologous series ? $C_2H_4$, $C_4H_{10}$, $C_3H_4$, $C_4H_8$ (ii) Write the product(s) i...
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#20 Class 10 Science Metals and Non-metals 2026 Long 4M CBSE
Read the following passage and answer the questions that follow : An electrochemical process is used for refining metals by selectively dissolving and depositing them through electrolysis. Electrolytic refining is use...
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