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Posted Date: 09 Oct 2009 Posted By: ruchiagrawal Member Level: Bronze
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2007 CBSE CHEMISTRY+BIOLOGY Question paper
Class IX
Time: 3hrs
1: Can solids diffuse into solids? Give an example?
2: The solubility of potassium nitrate at 25c is 48g. What do you mean by this statement?
3: Where are proteins synthesized inside the cell?
4: Why do plants cells have large number of vacuoles?
5: How would you confirm that the given colourless liquid is water?
6: How would you separate the mixture of iron and sulphur without using magnet?
7: How are emulsions different from gels?
8: Why is plasma membrane called a selectively permeable membrane?
9: Give the terms for the incipient nucleus of prokaryotic cell?
10: State differences between true solution and suspension?
11: How many types of elements together make up the phloem tissue?
12: A solution contains 5gm of glucose dissolved in 45gm of water. Calculate the concentration of the solution in mass%?
13: What is the effect of temperature on diffusion of gases? Give reason?
14: Why is density of solids higher than that of liquids? Give reason?
15: What is meant by tyndall’s effect? What is its cause?
16: Which among the following will show tyndall’s effect- Salt soln, milk and why?
17: Identify the tissue:
A: Tissue that connects bone to bone in humans.
B: Tissue present in spinal cord.
C: Tissue that stores fat in our body.
D: Tissue containing solid matter.
E: Tissue present in the lining of kidney tabules.
F: Tissue present in the husk of the coconut.
18: Name the cell organelle:
A: Having its own DNA and Ribosomes.
B: Concerned with the storage of starch and oil.
C: Proceeding turgidity and rigidity to the cell.
D: Concerned with digesting worn out cell organelles.
19: Define endocytosis?
20: Name the technique used to separate pure solid from the solution?
21: State advantages of crystallization?
22: Give one difference between:
A: Simple permanent tissue and complex permanent tissue
B: Collenchyma and parenchyma
23: Diagrammatically show the difference between striated and smooth muscle?
24: Name the method you will employ to:
A: Separate the mixture of Acetone and water.
B: Draw neat and well labelled diagram of the apparatus used.
25: Name the method you will employ for the separation of different components from petroleum.
A: Draw neat and well labelled diagram of the apparatus used.
26: Vipul of class IX took 5gm of Iron fillings and 3gm of Sulphur powder in a china dish. He strongly heated the contents. Removed the contents from the flame and allowed it to cool.
A.1. Identify the substance (x) formed on heating the contents. State its colour.
2. How will separate the compound ‘x’ into his constituents?
B. 3. Vipul added his HCl to substance ‘x’ to get as a gas ‘y’.
4. Identify gas ‘y’ giving reason.
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