Q1
mcq
1 mark
Magnification of a convex lens is always:
- A. Positive
- B. Negative
- C. Either positive (or) negative
- D. Zero
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Q2
mcq
1 mark
In which of the following reaction, the mass number decreases by four of the daughter nucleus?
- A. $\alpha$ decay
- B. $\beta$ decay
- C. $\gamma$ decay
- D. neutron decay
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Q3
mcq
1 mark
The gram molecular mass of water is:
- A. 2 g
- B. 16 g
- C. 18 g
- D. 8 g
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Q4
mcq
1 mark
Which of the following is the universal solvent?
- A. Acetone
- B. Benzene
- C. Water
- D. Alcohol
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Q5
mcq
1 mark
The secondary suffix used in IUPAC nomenclature of an aldehyde is __________.
- A. -ol
- B. -oic acid
- C. -al
- D. -one
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Q6
mcq
1 mark
The heart of amphibians possess __________ chambers.
- A. 3
- B. 4
- C. 2
- D. 5
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Q7
mcq
1 mark
Kreb’s cycle takes place in __________.
- A. chloroplast
- B. mitochondrial matrix
- C. stomata
- D. inner mitochondrial membrane
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Q8
mcq
1 mark
Bipolar neurons are found in:
- A. retina of eye
- B. cerebral cortex
- C. embryo
- D. respiratory epithelium
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Q9
mcq
1 mark
Syngamy results in the formation of __________.
- A. zoospores
- B. conidia
- C. zygote
- D. chlamydospores
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Q10
mcq
1 mark
Match the following:
(1) Sarcoma
(2) Carcinoma
(3) Polydipsia
(4) Polyphagia
- A. (1)-(iii), (2)-(iv), (3)-(ii), (4)-(i)
- B. (1)-(iv), (2)-(iii), (3)-(i), (4)-(ii)
- C. (1)-(i), (2)-(iii), (3)-(iv), (4)-(ii)
- D. (1)-(iv), (2)-(i), (3)-(ii), (4)-(iii)
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Q11
mcq
1 mark
9 : 3 : 3 : 1 ratio is due to:
- A. Segregation
- B. Crossing over
- C. Independent assortment
- D. Recessiveness
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Q12
mcq
1 mark
The term Ethnobotany was coined by:
- A. Khorana
- B. J.W. Harshberger
- C. Ronald Ross
- D. Hugo de Vries
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Q16
short answer
Mention any two applications of Avogadro’s Law.
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Q17
short answer
List out the parasitic adaptations in leech.
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Q18
short answer
What are the structures involved in the protection of brain?
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Q19
short answer
Identify the parts A, B, C and D in the given figure.
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Q22
short answer
Calculate the amount of energy released when a radioactive substance undergoes fusion and results in a mass defect of 2 kg.
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Q23
long answer
Deduce the equation of force using Newton’s Second Law of Motion.
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Q24
long answer
Differentiate the eye defects : Myopia and Hypermetropia.
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Q25
short answer
(a)What do you understand by the term Ultrasonic Vibration ?
(b)What is meant by reflection of sound ?
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Q26
short answer
(a)What is an amalgam ? Give an example.
(b)Mention any two uses of copper.
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Q27
long answer
Explain the mechanism of cleansing action of soap.
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Q28
short answer
(a)Name the three basic tissue systems in a flowering plant.
(b)What are the factors affecting photosynthesis ?
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Q30
long answer
How do rainwater harvesting structures recharge ground water ?
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Q31
short answer
(a)What do you understand by the term phenotype and geno type ?
(b)What are allosomes ?
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Q32
short answer
(a)Calculate the pH of 0.01 M solution of HNO3.
(b)A solution is prepared by dissolving 25 g sugar in 100 g of water. Calculate the mass percentage of solute.
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Q33
long answer
(a)(i)State Joule’s Law of Heating.
(ii)An alloy of nickel and chromium is used as the heatin g element. Why ?
(iii)How does a fuse wire protect electrical appliances ?
OR
(b)(i)What is a longitudinal wave ?
(ii)What is a nuclear reactor ? Explain its essential p arts with their functions.
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Q34
long answer
(a)(i)Define : Atomicity.
(ii)Calculate the percentage of sulphur in H2SO4.
(iii)In what way hygroscopic substances differ from deliquescent substances.
OR
(b)(i)Differentiate reversible and irreversible reaction.
(ii)What is neutralization reaction ? Give an example.
(iii)Give any three characteristics of homologous series.
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Q35
long answer
(a)(i)Which hormone induces parthenocarpy in tomatoes ?
(ii)Why is thyroid hormone referred as ‘personality hormone’ ?
(iii)Explain Lamarck’s theories of evolution.
OR
(b)(i)Which enzyme cuts DNA at specific sites ?
(ii)Name two maize hybrids rich in amino-acid, lysi
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Q37
short answer
Calculate the percentage of sulphur in $H_2SO_4$.
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Q38
short answer
In what way hygroscopic substances differ from deliquescent substances.
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Q39
short answer
Differentiate reversible and irreversible reaction.
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Q40
short answer
What is neutralization reaction ? Give an example.
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Q41
short answer
Give any three characteristics of homologous series.
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Q42
short answer
Which hormone induces parthenocarpy in tomatoes ?
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Q43
short answer
Why is thyroid hormone referred as ‘personality hormone’ ?
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Q45
short answer
Which enzyme cuts DNA at specific sites ?
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Q46
short answer
Name two maize hybrids rich in amino-acid, lysine.
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Q47
short answer
Explain smoking hazards and the harmful effects of tobacco.
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