Q.1 |
Which of the following is not an advantage of organism reproducing through spores? |
a) |
Large numbers of spores are produced in one sporangium. |
b) | Spores are distributed easily by air to far-off places to avoid competition at one place. |
c) | They are clones of actual organism leaving them vulnerable. |
d) | Spores are covered by thick walls to prevent dehydration under unfavourable conditions. |
Q.2 |
Which of the following statements are correct? Statement A: Solubility of alcohols in water goes on increasing with increasing molecular weight. Statement B: Boiling point of alcohols goes on increasing with increasing molecular weight. |
a) |
Neither statement A nor statement B is true. |
b) | Statement A is true; Statement B is false. |
c) | Both the statements A and B are true. |
d) | Statement B is true; Statement A is false. |
Q.3 |
K+, Ar, Ca2+ and S2- have |
a) |
Same electronic configuration and atomic volume |
b) | Different electronic configuration but same I.P |
c) | Same electronic configuration but different atomic volume |
d) | Same electronic configuration and same I.P |
Q.4 |
Which of the following hormones causes the shedding of leaves and fruits?
|
|
a) |
Indole acetic acid |
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b) | Abscisic acid |
|
c) | Naphthalene acetic acid |
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d) | Gibberellins and Naphthalene acetic acid |
Q.5 |
Consider the following statements and choose the correct option: Statement A: Obtaining energy from the nuclear fusion reaction is preferable to obtaining energy from nuclear fission reactions. Statement B: Electricity generated by the water stored in a dam can be considered to be another form of solar energy. |
a) |
Statement A is true, Statement B is false |
b) | Statement B is true, Statement A is false |
c) | Both the statement A and B are false |
d) | Both the statements A and B are true |
Q.6 |
Match the following with correct response.
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a) |
1-A, 2-C, 3-B, 4-D |
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b) | 1-C, 2-B, 3-D, 4-A |
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c) | 1-B, 2-D, 3-A, 4-C |
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d) | 1-D, 2-A, 3-C, 4-B |
Q.7 |
Which of the following chemical reactions is balanced and also undergoes combustion? |
a) |
C3H8 + 5O2 → 3CO2 + 4H2O |
b) | 6CO2 + 12H2O → C6H12O6 + 6O2 + 6H2O |
c) | C3H6 + 4O2 → 3CO2 + 3H2O |
d) | 2Al + 3H2SO4 → Al2(SO4)3 + 3H2 |
Q.8 |
Consider the following statements about DC motor: Statement A: A commutator is sometimes called split rings. Statement B: The induced current produced in the conductor is direct in nature. Which of the statement is true? |
a) |
Statement B is true, A is false |
b) | Statement A is true, B is false |
c) | Both the statements are true |
d) | Both the statements are false |
Q.9 |
Identify the molecular formulae of the acid and the alcohol from which an ester can be prepared: |
a) |
CH3COOH + C2H5OH |
b) | HCOOH + C2H5OH |
c) | HCOOH + CH3OH |
d) | CH3CH2COOH + CH3OH |
Q.10 |
Current flows through a conductor connected across a voltage source. Now the resistance of the conductor is reduced to one-sixth to its initial value and connected across the same voltage source. The heating effect in the conductor will become ________. |
a) |
1/6th |
b) | six times |
c) | half |
d) | three times |
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Sample PDF of SilverZone - International Talent Hunt Olympiad (ITHO) PDF Sample Papers for Class 10:
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Answers to Sample Questions from Olympiad Success:
Q.1 : c | Q.2 : d | Q.3 : c | Q.4 : b | Q.5 : a | Q.6 : b | Q.7 : a | Q.8 : b | Q.9 : a | Q.10 : b