Q1
mcq
1 mark
Where should an object be placed so that a real and inverted image of same size is obtained by a convex lens ?
- A. f
- B. infinity
- C. 2f
- D. between f and 2f
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Q2
mcq
1 mark
If a molecule is made of similar kind of atoms, then it is called __________ molecule.
- A. Mono atomic
- B. hetero atomic
- C. homo atomic
- D. poly atomic
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Q3
mcq
1 mark
The number of components in a binary solution is _________.
- A. 2
- B. 3
- C. 4
- D. 5
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Q4
mcq
1 mark
A charge of 12 coulomb flows through a bulb in 5 sec ond. What is the current through the bulb ?
- A. 60 A
- B. 17 A
- C. 2.4 A
- D. 24 A
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Q5
mcq
1 mark
Rectified spirit is an aqueous solution which contains about __________ of ethanol.
- A. 95.5%
- B. 75.5%
- C. 55.5%
- D. 45.5%
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Q6
mcq
1 mark
The endarch condition is the characteristic feature of __________.
- A. root
- B. stem
- C. leaves
- D. flowers
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Q7
mcq
1 mark
The heart of fishes possess __________ chambers.
- A. 3
- B. 4
- C. 2
- D. 5
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Q8
mcq
1 mark
Male gametes in angiosperms are formed by the division of __________.
- A. Generative cell
- B. Vegetative cell
- C. Pollen grain mother cell
- D. Microspore
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Q9
mcq
1 mark
Which one is referred as “Master Gland” ?
- A. Pineal gland
- B. Pituitary gland
- C. Thyroid gland
- D. Adrenal gland
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Q10
mcq
1 mark
Himgiri developed by hybridization and selection for disease resistance against rust pathogens is a variety of __________.
- A. chilli
- B. maize
- C. sugarcane
- D. wheat
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Q10
short answer
(a) (i) What is meant by electric current ?
(ii) Name and define its unit.
(iii) Which instrument is used to measure the electric current ? How should it be connected in a circuit ?
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Q10
short answer
(b) (i) Who discovered natural radioactivity ?
(ii) Write any three features of natural and artificial radioactivity.
(iii) Give any three uses of radio isotopes in the field of agriculture.
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Q11
mcq
1 mark
Match the following :
(1)Solar Energy (i)Flowing water
(2)Petroleum (ii)Mobile phone
(3)Hydropower (iii)Inexhaustible energy
(4)Electronic device (iv)Exhaustible energy resource
- A. (1) - (iv), (2) - (iii), (3) - (ii), (4) - (i)
- B. (1) - (iii), (2) - (iv), (3) - (i), (4) - (ii)
- C. (1) - (iii), (2) - (i), (3) - (iv), (4) - (ii)
- D. (1) - (i), (2) - (iv), (3) - (ii), (4) - (iii)
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Q11
short answer
(a) (i) Define : Atomicity. Give an example.
(ii) Consolidate the major differences between atoms and molecules.
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Q11
short answer
(b) (i) Define combination reaction.
(ii) Give an example for combination reaction.
(iii) Differentiate reversible and irreversible reaction.
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Q12
mcq
1 mark
Find the correct pair :
- A. Gregor Johann Mendel - Theory of Natural Selection
- B. Waldeyer - Chromosomes
- C. Watson and Crick - Theory of Evolution
- D. Jean Baptiste Lamarck - Law of Heredity
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Q16
short answer
Write the functional group and the suffix used for the following class of compounds.
Class of Compounds Functional Group Suffix used
Alcohol
Aldehyde
Ketone
Carboxylic Acid
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Q17
short answer
What is the importance of rainwater harvesting ?
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Q18
short answer
Identify the parts A, B, C, D in the given figure.
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Q19
short answer
What is evolution ? Who proposed the theories of evolution ?
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Q20
short answer
Name the two maize hybrids rich in amino acid lysine.
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Q21
short answer
What is the importance of valves in the heart ?
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Q22
short answer
A person with myopia can see objects placed at a distance of 4 m. If he wants to see objects at a distance of 20 m, what should be the focal length and power of the concave lens he must wear ?
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Q25
long answer
Explain why the ceilings of concert halls are curved ?
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Q26
short answer
(a)What is an alloy ?
(b)Give the reasons for alloying.
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Q27
short answer
Classify the following compounds based on the pattern of carbon chain and give their structural formula :
(i)Propane (ii)Benzene (iii)Cyclobutane (iv)Furan
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Q28
short answer
(a)What is respiratory quotient ?
(b)Write the overall reaction for photosynthesis.
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Q29
short answer
(a)Draw and label the parts of process of transpiration.
(b)Draw the pictures of Granulocytes.
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Q30
short answer
(a)List the theories postulated to explain the origin of life.
(b)Who coined the term ‘Ethnobotany’ ?
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Q31
long answer
Discuss the importance of biotechnology in the field of medicine.
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Q32
short answer
‘A’ is a blue coloured crystalline salt. On heating it loses blue colour and gives ‘B’. When water is added, ‘B’ gives back ‘A’. Identify ‘A’ and ‘B’. Write the equation.
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Q33
short answer
(a)(i)What is meant by electric current ?
(ii)Name and define its unit.
(iii)Which instrument is used to measure the electric current ? How should it be connected in a circuit ?
OR
(b)(i)Who discovered natural radioactivity ?
(ii)Write any three features of natural and artificial radioactivity.
(iii)Give any three uses of radio isotopes in the field of agriculture.
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Q34
short answer
(a)(i)Define :Atomicity. Give an example.
(ii)Consolidate the major differences between atoms and molecules.
OR
(b)(i)Define combination reaction.
(ii)Give an example for combi
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Q37
short answer
(b) Write the overall reaction for photosynthesis.
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Q38
short answer
(a) Draw and label the parts of process of transpiration.
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Q40
short answer
(a) List the theories postulated to explain the origin of life.
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Q46
short answer
(a) (i) What are synthetic auxins ? Give examples.
(ii) Define triple fusion.
(iii) Name the secondary sex organs in male.
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Q47
short answer
(b) (i) Why did Mendel select pea plant for his experiment ?
(ii) Suggest measures to overcome the problems of an alcoholic.
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