theuranium.org : Talent Search Exam Question Paper Class IX Model

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Exam : Uranium Talent Search Examination
Document Type : Model Question Paper
Class : Class- IX

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Uranium Talent Search Examination Model Paper

1. You are given 0.5 mole of aluminium nitrate. The number of moles of aluminium ions and nitrate ions respectively are
(a) 0.5, 1.5 (b) 0.5, 0.5 (c) 1.5, 0.5 (d) 1.0, 1.5

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2. Cu2SO3 is
(a) cupric sulphite (b) cuprous sulphite (c) cuprous sulphate (d) cupric sulphate

3. Which of the following statement about structure of atom is wrong ?
(a) According to Bohr’s model of atom, as long as electron revolves in a particular orbit, it does not emit energy.
(b)According to Rutherford’s model of atom, there is a minute but massive body at centre of an atom called nucleus and most of the space of the atom is empty.
(c) According to Rutherford’s model electrons revolve round the nuclues in fixed circular orbits.
(d) According to Bohr’s model of atom electron can jump from one orbit to the other.

4. Oxygen has three isotopes 16O
8 , 17O
8 and 18O
8 in the relative abundance of 99.78, 0.02 and 0.2% respectively. The averge atomic mass of oxygen atom is
(a) 17 (b) ˜16 (c) ˜18 (d) 17

5. An element (X) has 19 protons and 21 neutrons, while element (Y) has 20 protons and 20 neutrons. Then (X) and (Y) are
(a) isotopes (b) isotones (c) allotropes (d) isobars

6. An element (P) has five electrons in the M shell. It has 16 neutrons. Then its atomic number and mass number respectively are :
(a) 15, 31 (b) 13, 32 (c) 5, 21 (d) 21, 16

7. In a sample of water the mass of oxygen was found to be 1.328 × 10 –22 gm. The number of H atoms present in that sample of water would be
(a) 5 (b) 10 (c) 15 (d) 20

8. 98 u (amu) of sulphuric acid containss
(a) 6.023 × 1023 molecules (b) 98 molecules (c) 1 molecule (d) none
9. In a sample of ammonia gas(NH3) the total number of H atoms was found to be 0.003 × NA. The mass of nitrogen in that sample would be (NA = Avogadro’s number)
(a) 0.028 g (b) 0.28 g (c) 0.14 g (d) 0.014 g

10. The number of protons present in Al3+ ion ( Atomic Number = 13, Mass Number = 27)
(a) 13 (b) 10 (c) 14 (d) 17

11. 0.18 mole of a solute having molecular mass 50 was found to dissolve in 5 moles of water to give a saturated solution at a particular temperature. What is its solubility in mass by mass percentage ?
(a) 9.09 (b) 10.00 (c) 18.00 (d) 55.55

12. Which of the following statements is not correct ?
(a) milk is a liquid-liquid type of colloidal system called emulsion.
(b) colloidal solution is homogenous
(c) suspension scatters light when the particles remain suspended
(d) the particle size(diameter) of the solute in a true solution is less than 1 nm.

13. The boiling point of methyl alcohol is 650C while that of ethyl alcohol is 780C. You are given a mixture of these two liquids. How will you separate one from the other ?
(a) simple distillation (b) distillation using a fractionating column
(c) chromatography (d) using a separating funnel

14. Which of the following is incorrect about states of matter ?
(a) solids have fixed shape because their basic crystal units have fixed shape.
(b) liquids have fixed volume but no fixed shape
(c) gases have neither fixed volume nor fixed shape
(d) When a particular matter changes its state from one to the other, the temperature changes.

15. According to binomial nomenclature principle an order is made up of a number of ______.
(a) class (b) genus (c) family (d) species

16. Which of the following statement is not true about bacteria ?
(a) their cells do not possess true nucleus
(b) they belong to the kingdom monera
(c) their cells do not contain mitochondria and golgi body
(d) they are always heterotrophic

17. Which is true about paramecium ?
(a) it is unicellular eukaryotic animal (b) it belongs to the phylum poriphera
(c) it cannot exist freely (d) it is a multicellular and heterotrophic animal

18. The animal belonging to which phylum has no capacity of locomotion but performs digestion and respiration through a canal system present in its body ?
(a) porifera (b) protozoa (c) platyhelminthes (d) coelenterata

19. Which animal possesses tentacles ?
(a) schisotoma (b) pinworm (c) hydra (d) euglina
20. The seeds of which plant exists in the naked state ?
(a) marchantia (b) cycas (c) paphiomedilum (d) ground-nut

21. By which process water enters into a cell ?
(a) diffusion (b) osmosis (c) endocytosis (d) exocytosis

22. Let us put a green Rheo leaf in boiling water for a few minutes. Then mount the the leaf on a slide and then put some concentrated salt solution over the leaf. After waiting for a few minutes, the leaf is observed through an ultramicroscope. Which of the following phenomenon occurs ?
(a) osmosis : water enters into the cell and the cell swells up
(b) osmosis: water leaves out of the cell and the cell shrinks
(c) diffusion: CO2 gas bubbles leaves out of the cell (d) none of these

23. Which cell organelle of the vertebrates is responsible for detoxifying poisonous sustances ?
(a) ribosome (b) golgi body (c) smooth endoplasmic reticulum(SER)
(d) rough endoplasmic reticulum(RER)

24. Which of the following pair represents proper matching ?
(a) golgi apparatus – synthesis of enzymes (b) lysosome – digestion of damaged cell
(c) ribosome – formation of ATP (d) mitochondria – storage and package of protein

25. Which cell organelle does not have its own DNA and ribosome ?
(a) leucoplasts (b) mitochondria (c) lysosome (d) none of these