Source of Energy
1. Which of the following is not a bio-mass source?

A. Gobar gas B. Coal C. Wood D. Nuclear energy

Answer: Option (D)
2. The energy which is not derived from the sun is ______.

A. biomass B. fossil fuels C. nuclear energy D. geothermal energy

Answer: Option (C)
3. A substance which produces a lot of heat on burning is called ______.

A. oxidizing agent B. biogas C. biomass D. fuel

Answer: Option (D)
4. Fuel formed under the earth's surface by the decomposition of organic matter is called ______.

A. organic fuel B. biogas C fossil fuel D. underground fuel

Answer: Option (C)
5. The main constituent of CNG is ______.

A. methane B. butane C. ethane D. propane

Answer: Option (A)
Living world :-Life Processes
1. Evolutionary changes help in producing new

A. individuals B. communities C. species D. plants

Answer: Option (C)
2. A synthesized knowledge of science may have observations which can be qualitative and

A. deductive B. inductive C. quantitative D. exact

Answer: Option (C)
3. A change in evolution give rise to an increase in

A. biodiversity B. population C. community D. geological periods

Answer: Option (A)
4. Any theory is considered a good theory if it leads to further hypothesis and is known as

A. productive hypothesis B. generative hypothesis C. nil hypothesis D. multiple hypotheses

Answer: Option (A)
5. The reasoning which involves specific examples of observations and leads to a general principle is

A. inductive reasoning B. deductive reasoning C. formal reasoning D. mature reasoning

Answer: Option (A)
Transportation, Excretion
1. Plants store excretory waste products...

A. in food vacuoles B. as resins and gum C. in cellular vacuoles D. both in cellular vacuoles and as resin and gums

Answer: Option (B)
2. Unicellular organisms use _____ process for excretion.

A. diffusion B. osmosis C. evaporation D. vomiting

Answer: Option (A)
3. Which is the main excretory organ of the human body?

A. Urinary bladder B. Ureter C. Kidney D. Uriniferous tubule

Answer: Option (C)
4. The tube emerging from each kidney is called...

A. uriniferous tubule B. ureter C. urethra D. urinary bladder

Answer: Option (B)
5. Urine is stored in...

A. ureter B. kidney C. urinary bladder D. ureter

Answer: Option (C)
Reproduction, growth, Heredity and Evolution Reproduction and growth:-Types of Reproduction
1. Uterus opens into the vagina through

A. ovary B. oviduct C. cervix D. urethra

Answer: Option (C)
2. Germinating pollen grain is a rich source of

A. cytokinin B. gibberellin C. auxin D. rennin

Answer: Option (C)
3. Placenta passes out through the vagina

A. 10-20 minutes after birth B. 10-15 minutes after birth C. 10-30 minutes after birth D. 10-45 minutes after birth

Answer: Option (D)
4. Identical gametes are also known as

A. heterogametes B. isogametes C. anisogamete D. hypogametes

Answer: Option (B)
5. Parthenogenesis has the advantage of

A. accelerating the normal reproductive rate B. accelerating normal respiratory activity C. accelerating normal flowering D. accelerating normal growth

Answer: Option (A)
Natural Resources
1. In our country the percentage of land under forest is about:

A. 20% B. 19% C. 25% D. 30%

Answer: Option (B)
2. Which of the following statements about the forest is not correct?

A. Forest reduces soil erosion B. Provides recreational opportunities C. Provides economic development D. None of the above

Answer: Option (D)
3. Forest and wildlife are

A. Renewable resource B. Non-renewable resources C. Inexhaustible resources D. None of these

Answer: Option (A)
4. Which of the following is not true about deforestation?

A. Population explosion is one of the reasons for deforestation. B. Cleaning of forest for agriculture causes deforestation. C. Deforestation is taking place only in developing courtiers. D. Cash crop economy of the third world is a cause of deforestation.

Answer: Option (C)
5. Deforestation generally decreases

A. Rainfall B. Soil erosion C. Draught D. Global warming

Answer: Option (A)
Carbon Compounds
1. Find the odd one among the following:

A. Alicyclic compounds B. Heterogeneous compounds C. Branched-chain compounds D. Aromatic compounds

Answer: Option (C)
Explanation: Branched chain compound is a classification of open-chain compounds. Whereas, alicyclic, aromatic and heterogeneous compounds are sub-classifications of cyclic compounds.
2. Identify the odd one among the following

A. Indene B. Anthracene C. o,m,p-xylene D. Azulene

Answer: Option (D)
Explanation: Azulene is a non- benzenoid compound. Whereas, Indene, anthracene, and o,m,p-Xylene are examples of benzenoid aromatic compounds.
3. Which among the following is not a class of organic compound

A. Carbonyl compound B. Nitro compound C. Amides D. Electro compounds

Answer: Option (D)
Explanation: Classes of organic compounds are those which involves organic compounds such as carbon, hydrogen and oxygen. Hence, electro compounds is not a class of organic compounds.
4. Which among these is not associated with aliphatic compounds

A. They contain (4n+2)pi electrons B. Contain straight chain compounds C. Contain branched chain compounds D. Has an appropriate number of H-atoms and functional groups

Answer: Option (A)
Explanation: The aromatic compounds (4n+2)pi electrons, which comes under the classification of cyclic compounds and hence they are not associated with aliphatic compounds.
5. Which among the following is not an example of Acyclic compound

A. Acetaldehyde B. Ethane C. Cyclopropane D. Isobutane

Answer: Option (C)
Explanation: Cyclopropane is a ring (cyclic) compound and hence it does not come with the examples of open-chain compounds.
Environment
1. An ecological pyramid refers to the

A. Pyramid of energy B. Pyramid of number C. Pyramid of biomass D. All of the above

Answer: Option (D)
2. An ecosystem may not undergo changes because:

A. It is in a state of homeostasis B. It has plants and animals both C. It gets solar energy continuously D. The decomposers are present in it

Answer: Option (A)
3. Energy flow in the ecosystem is given by:

A. Haeckel B. Odum C. Tansley D. Ramdeo Mishra

Answer: Option (B)
4. Energy flow in an ecosystem is always:

A. Unidirectional B. Cyclic C. Reversible D. Multi-directional

Answer: Option (A)
5. The primary producers in a forest ecosystem are:

A. Chlorophyll-containing trees and plants B. Herbivores C. Carnivores D. Bacteria and another micro-organism

Answer: Option (A)
The Universe
1. Community or collection of stars is called

A. solar system B. galaxy C. planet D. milky way

Answer: Option (B)
2. The shape of the galaxy which is longer in only one direction and is more rounded is called

A. spiral shape galaxy B. irregular shape galaxy C. elliptical shape galaxy D. regular shape galaxy

Answer: Option (C)
3. Milky Way galaxy is a cluster of galaxies which is also known as

A. local group B. big bang group C. temperate group D. none of the above

Answer: Option (B)
4. Galaxies are categorized on the basis of their shape which includes

A. spiral shape galaxies B. elliptical galaxies C. irregular galaxies D. all of the above

Answer: Option (D)
5. According to scientists, a gigantic explosion by which the universe came into being is called

A. universal theory B. solar system theory C. milky way theory D. big bang theory

Answer: Option (D)