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Worksheets10 physical science
Total questions: 20
Worksheet time: 10mins
Galena is the ore of _______
Zn
Pb
Hg
Al
Which of the following element is electo negative?
Sodium
Magnesium
Oxygen
Calcium
When a light ray travels denser to rarer medium, the relation between 'r' and 'i' is?
r=i
r>i
r<i
r/i
Which one of the following materials can not be used to make a lens?
Water
Glass
Plastic
Clay
If the Speed of light were the same in all the media,which of the process is not possible.
Reflection
Refraction
Dispersion
All the above
Which of the following is snell's law?
n1 sini=sinr/n2
n1/n2=sinr/sini
n2/n1=sinr/sini
n2sini=constant
The colour of acid with phenopthalene indicator is?
Pink
Colourless
Orange
Red
A solution turns red litmus blue .What is its PH value?
1
4
5
10
Which of the following has more specific heat value?
Kerosene oil
Iron
Copper
Water
The Specific heat of a substance depends on its____________
Temparature
Mass
Nature
All the above
10. What is Rancidity? Write steps to prevent rancidity.
9. What do you mean by Corrosion? Write steps to prevent corrosion.
8. You are given the following chemical reaction:
This reaction represents:
CuO + H2 ----------> Cu + H2O
a. Combination reaction as well as double displacement reaction
b. Redox reaction as well as displacement reaction
c. Double displacement reaction as well as Redox reaction
d. Decomposition reaction as well as displacement reaction
7. The neutralization reaction between an acid and a base is a type of:
a. Double displacement reaction
b. Displacement reaction
c. Addition reaction
d. Decomposition reaction
6. When ferrous sulphate is heated strongly it undergoes decomposition to form ferric oxide as a main product accompanied by a change in colour from:
a. Blue to green.
b. Green to blue.
c. Green to brown.
d. Green to yellow.
5. The process of breakdown of water into its components using electricity is:
a. Distillation of water
b. Purification of water
c. Electrolysis of water
d. Hydrolysis
4. It is necessary to balance a chemical equation in order to satisfy the law of:
a. Conservation of motion
b. Conservation of momentum
c. Conservation of energy
d. Conservation of mass
3. The respiration process during which glucose undergoes slow combustion by combining with oxygen in the cells of our body to produce energy is a kind of:
a. Exothermic process
b. Endothermic process
c. Reversible process
d. Physical process
In a chemical reaction between Sulphuric acid and Barium chloride solution the white precipitates formed are of:
a. Hydrochloric acid
b. Barium sulphate
c. Chlorine
d. Sulphur
1. Before burning in air, the Magnesium ribbon is cleaned by rubbing with a sand paper to:
a. Make the ribbon surface shinier
b. Remove the layer of Magnesium oxide from the ribbon surface
c. Remove the layer of Magnesium carbonate from the ribbon surface
d. Remove the moisture from the ribbon surface
