Class 10 Science
Guess Paper – 2012
Class – X
Subject – Science
Time :90 minutes Set (03) M.M :40
Note : all questions are compulsory .
Section A
Q.1 By what other name is the unit coulomb × volt ? 1
Q.2 What do the symbols { } { } mean in electric circuit?
Q.3 Balance the reaction
CuO + HCl → CuCl2 + H2O
Q.4 Name the process in which plants release CO2 .
Q.5 what is displacement reaction? Give an example of is displacement reactions?
Q.6 Write the differences between Autotrophic and parasitic nutrition.
Q.7 An electric bulb draws a current of 0.9 A for 3 minutes. Calculate the amount of electric charge that flows through the circuit.
Section B (Choose the Correct Answer)
Q.8 Which of the following is not used by plants to make food?
(a)Water (b) CO2 (c) sunlight (d) Proteins
Q.9 Which is best conductor of electricity?
(a) Gold (b) Copper (c) iron (d) Silver
Q.10 Name the energy currency of body. (a)ATP (b) DDT (c) Joule (d) none of these
Q.11 in order to prevent the spoilage of potato chips, they are packed in plastic bags with :
(a)Cl 2 (b) O2 (c) H2 (d) N2
Q.12 The process of digestion in humans is completed in:
(a)Large Intestine (b) Stomach (c)Oesophagus (d) Small intestine
Q.13 The SI unit of current is
(a)Newton (b) Coulomb (c) Ampere (d) volt
Q.14 Which of the following is an exothermic reaction :
(a)6CO2 + 6H2O C6H12O6 + 6O2
(b) C6H12O6 + 6O2 6CO2 + 6H2O
(c)CaCO3 CaO +CO2
(d)2H2O 2H2 +O2
Q.15 What type of reaction is represented by CaO +CO2 → CaCO3
(a)Combination (b) Decomposition (c) Displacement (d) Double displacement
Q.16 Which of the following Cannot be decomposed by sunlight?
(a)NaCl (b) CuCl2 (c)CaCl2 (d) none of these
Q.17 Which of the following type of energy is used by living organisms to perform life
Class – X
Subject – Science
Time :90 minutes Set (03) M.M :40
Note : all questions are compulsory .
Section A
Q.1 By what other name is the unit coulomb × volt ? 1
Q.2 What do the symbols { } { } mean in electric circuit?
Q.3 Balance the reaction
CuO + HCl → CuCl2 + H2O
Q.4 Name the process in which plants release CO2 .
Q.5 what is displacement reaction? Give an example of is displacement reactions?
Q.6 Write the differences between Autotrophic and parasitic nutrition.
Q.7 An electric bulb draws a current of 0.9 A for 3 minutes. Calculate the amount of electric charge that flows through the circuit.
Section B (Choose the Correct Answer)
Q.8 Which of the following is not used by plants to make food?
(a)Water (b) CO2 (c) sunlight (d) Proteins
Q.9 Which is best conductor of electricity?
(a) Gold (b) Copper (c) iron (d) Silver
Q.10 Name the energy currency of body. (a)ATP (b) DDT (c) Joule (d) none of these
Q.11 in order to prevent the spoilage of potato chips, they are packed in plastic bags with :
(a)Cl 2 (b) O2 (c) H2 (d) N2
Q.12 The process of digestion in humans is completed in:
(a)Large Intestine (b) Stomach (c)Oesophagus (d) Small intestine
Q.13 The SI unit of current is
(a)Newton (b) Coulomb (c) Ampere (d) volt
Q.14 Which of the following is an exothermic reaction :
(a)6CO2 + 6H2O C6H12O6 + 6O2
(b) C6H12O6 + 6O2 6CO2 + 6H2O
(c)CaCO3 CaO +CO2
(d)2H2O 2H2 +O2
Q.15 What type of reaction is represented by CaO +CO2 → CaCO3
(a)Combination (b) Decomposition (c) Displacement (d) Double displacement
Q.16 Which of the following Cannot be decomposed by sunlight?
(a)NaCl (b) CuCl2 (c)CaCl2 (d) none of these
Q.17 Which of the following type of energy is used by living organisms to perform life