Atom and Potential Difference
BHARATHI MATRIC HR. SEC. SCHOOL KALLAKURICHI
STD: X SUB: SCIENCE PRE QUARTALY TIME: 3.00 MARK: 100
PART-A
I. Choose the correct answer 15x1=15
1. Pick out the wrong statement
(a) In a dicot seed there is a short longitudinal whitish ridge is called the Raphael
(b) There is a minute opening in dicot seed is known as micropyle .
(c) The rudimentary stem portion known as radical.
(d) The rudimentary root portion is called radical.
2. The roots of coconut tree are seen away from the plant such kind of movement of root for want of water is
a) Phototropism b) Geotropism c) Chemo-tropism c) Hydrotropism
3. Example for product of green chemistry is a) Plastic b) Paper c) Bio-plastics d) Halogen flame retardants
4. __ green house gas which causes climate change and global warning.
a) Hydrogen b) Oxygen c) Nitrogen d) Carbon dioxide
5. Consider the following statement regarding the dispersal of fruit by wind and select the correct answer.
a) Fruit and seeds dispersed with a sudden jerk by an explosive mechanism
b) Fruits of tridax are carry a persistent calyx modified into poppas
c) The fruits of xanthium have sharp pointed stiff hooks
d) The monocarp of coconut is fibres
6. ___ is opaque in nature. a) Water b) True solution c) Colloids d) Suspension
7. Chalk powder in water is an example of __ a) True solution b)Colloidal solution c)Suspension d)saturated solution
8. Metal + acid Salt+ ___ a) Oxygen b) Water c) Carbon d) Hydrogen
9. The PH of human blood is ___ a) 6.9 b) 7.4 c)4.8 d) 4.7
10. Copper is less reactive than___ a) Lead b) Zinc c) Platinum d) Both (a) and (b)
11. The atomic number of natural radioactive element is __ a) 82 c) Not defined d) at least 92
12. Kilowatt-hour is the unit of ___ a) Potential difference b) Electric power c) Electric energy d) Charge
13. The potential difference required to pass a current 0.2 A in a wire of resistance 20 ohm is ___
a) 100v b) 4v
STD: X SUB: SCIENCE PRE QUARTALY TIME: 3.00 MARK: 100
PART-A
I. Choose the correct answer 15x1=15
1. Pick out the wrong statement
(a) In a dicot seed there is a short longitudinal whitish ridge is called the Raphael
(b) There is a minute opening in dicot seed is known as micropyle .
(c) The rudimentary stem portion known as radical.
(d) The rudimentary root portion is called radical.
2. The roots of coconut tree are seen away from the plant such kind of movement of root for want of water is
a) Phototropism b) Geotropism c) Chemo-tropism c) Hydrotropism
3. Example for product of green chemistry is a) Plastic b) Paper c) Bio-plastics d) Halogen flame retardants
4. __ green house gas which causes climate change and global warning.
a) Hydrogen b) Oxygen c) Nitrogen d) Carbon dioxide
5. Consider the following statement regarding the dispersal of fruit by wind and select the correct answer.
a) Fruit and seeds dispersed with a sudden jerk by an explosive mechanism
b) Fruits of tridax are carry a persistent calyx modified into poppas
c) The fruits of xanthium have sharp pointed stiff hooks
d) The monocarp of coconut is fibres
6. ___ is opaque in nature. a) Water b) True solution c) Colloids d) Suspension
7. Chalk powder in water is an example of __ a) True solution b)Colloidal solution c)Suspension d)saturated solution
8. Metal + acid Salt+ ___ a) Oxygen b) Water c) Carbon d) Hydrogen
9. The PH of human blood is ___ a) 6.9 b) 7.4 c)4.8 d) 4.7
10. Copper is less reactive than___ a) Lead b) Zinc c) Platinum d) Both (a) and (b)
11. The atomic number of natural radioactive element is __ a) 82 c) Not defined d) at least 92
12. Kilowatt-hour is the unit of ___ a) Potential difference b) Electric power c) Electric energy d) Charge
13. The potential difference required to pass a current 0.2 A in a wire of resistance 20 ohm is ___
a) 100v b) 4v