Q29
short answer
(i)Why are the rings of cartilages found in trachea of Rabbit ?
(ii)List out any two parasitic adaptations in Leech.
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Q32
long answer
A container whose capacity is 70 ml is filled with a liquid up to 50 ml. Then, the liquid in the container is heated. Initially, the level of the liquid falls from 50 ml to 48.5 ml. Then we heat more, the level of the liquid rises to 51.2 ml. Calculate the apparent and real expansion.
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Q33
long answer
3 marks
(a)(i)What are the types of inertia ? Give an example for each type.
(ii)While catching a cricket ball, the fielder lowers his hands backwards. Why ?
OR
(b)(i)Three resistors of 1Ω, 2Ω and 4Ω are connected in parallel in a circuit. If a 1Ω resistor draws a current of 1A, find the current through the other two resistors.
(ii)State Ohm’s Law.
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Q34
long answer
3 marks
(a)(i)What is meant by binary solution ?
(ii)Give an example each for.
(1)Gas in liquid (2)Solid in liquid
(3)Solid in solid (4)Gas in gas
(iii)What is aqueous and non-aqueous solution ? Give an example.
OR
(b)(i)Explain the types of double displacement reactions with examples.
(ii)Calculate the pH of $1.0\times10^{-4}$ molar solution of HNO$_3$
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Q35
short answer
(a)(i)Name the three basic tissues system in flowering plants.
(ii)What is Photosynthesis and where in a cell does it occur ?
(iii)What is Respiratory Quotient ?
OR
(b)(i)Why did Mendel select pea plant for his experiments ?
(ii)What are Okazaki fragments ?
(iii)DNA consists of two __________ chains.
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