CET Science Model Question Paper : www.seafarers.edu.in Board of Examination for Seafarers Trust

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CET – Science Section – Practice Question
Please note – These question are for assisting candidates. The level of questions in the CET can similar or higher. Format of question paper will be similar to that given on the website (used for CET 1 – September, November, and December2011. We welcome contribution of additional questions from candidates / institutes. The questions are within the level of 10th standard of all HS Boards in India.

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Choose the correct alternative from the given options
1. Sodium bicarbonate is known as .......
(a) washing soda (b) baking soda (c) soda ash (d) mohr’s salt
2. Heating sodium bicarbonate releases ...... gas
(a)carbon dioxide (b) oxygen (c) hydrogen (d) nitrogen
3. ....... is used in fire extinguishers
(a) sodium carbonate (b) sodium bicarbonate (c) calcium carbonate (d) copper sulphate
4. Sodium carbonate is known as .......
(a) washing soda (b) baking soda (c) green vitriol (d) alum
5. ........ is a variety of calcium carbonate
(a) glass (b) paper (c) marble (d) black ink
6. ........ is used in preparation of tooth paste and tooth powder
(a) sodium carbonate (b) calcium carbonate (c) potassium carbonate (d) copper sulphate
7. ....... is an efflorescent substance
(a) calcium carbonate (b) sodium carbonate (c) potassium carbonate (d) sodium bicarbonate
8. Ferrous sulphate is commonly known as
(a) quick lime (b) chalk (c) blue vitriol (d) green vitriol
9. Crystalline ferrous sulphate is ........ in colour
(a) yellow (b) blue (c) green (d) red
10. Copper sulphate is commonly known as .......
(a) blue vitriol (b) green vitriol (c) alum (d) quick lime
11. Sulphuric acid is a ........
( a ) alkali ( b) acid (c) salt ( d )solid
12. Sodium hydroxide is a
( a ) gas ( b ) solid ( c ) alkali ( d ) acid
13. Dry ice is .......
( a ) a type of stone ( b ) solid carbon dioxide ( c ) solid oxygen ( d ) dry water
14. Laughing gas is ......
( a ) silicon oxide ( b ) nitrous oxide ( c ) oxygen gas ( d ) nitrogen gas
15. Carbon dioxide is .......
( a ) lighter than air ( b ) as heavy as air ( c ) heavier than air ( d ) lighter than water
16. Mercury is a .........
( a ) precious metal (b ) liquid ( c ) gas ( d ) vapour

A. Balance the following equations : (rewrite)
1. Mg + O2 ? MgO
2. HgO ? Hg + O2
3. BaCl2 + H2SO4 ? BaSO4 + HCl
4. KClO3 ? KCl + O2
5. Zn + HCl ? ZnCl2 + H2O
6. NaOH + ZnSO4 ? Zn ( OH )2 + Na2SO4
7. PbO + HCl ? PbCl2 + H2O
8. Na + H2O ? NaOH + H2
Which of the following is the odd one?
A) Hydrochloric acid
B) Sulphuric acid
C) Nitric acid
D) Ammonium Nitrate.
Which is not a complex sugar?
A) Glucose
B) Sucrose
C) Lactose
D) Maltose
Which of the following is not soluble in water?
A) Table sugar
B) Table salt
C) Table vinegar
D) Iron filings
To change the state of rest or of uniform
motion of any object ............. is required.
A) Some external force
B) Mass
C) Volume
D) environment
Which of the following is not a hydrocarbon
A) Ethane
B) Methane
C) Hydrochloric acid
D) Acetylene
Force is linked with ...........
A) Acceleration
B) Position of rest
C) Inertia
D) Velocity
Photosynthesis is the process of :
A) Assimilating carbon dioxide and water
B) Mixing carbon and oxygen
C) Mixing sulphur and carbon
D) None of the above
The force required to move an object depends
on the ......... of the object
A) Width
B) Mass
C) Volume
D) length
Find the odd one out:
A) Methane
B) Ethane
C) Propene
D) Butane
Find the odd one out :
A) Chlorine
B) Fluorine
C) Sulphur
D) Bromine
In a chemical reaction, the catalyst ............
a. Lowers the speed of reaction
b. Increases the speed of reaction
c. Does not affect the speed of reaction
d. Changes itself
Solar ........ converts solar energy into electricity
a. Cooker
b. Heater
c. Dryer
d. Cell
Large and unending source of energy is .......
a. Coal
b. Wood
c. Sun
d. Water
A device which converts water energy into electrical energy is known as .......
a. Solar cell
b. Armature
c. Solar dryer
d. Battery

Rewrite the second column to match the first column
Column 1 Column 2
Finely divided iron Detergents
Vanadium pentoxide Automobiles
Finely divided nickel Manufacture of SO3
Catalytic converters Manufacture of NH3
Enzymes Hydrogenation of vegetable oil
Write the formula of the following substances :
a. Copper Sulphate Answers : CuSO4
b. Potassium Chloride KCl
c. Calcium Carbonate CaCO3
d. Sodium Nitrate NaNO3
e. Calcium Hydroxide Ca(OH)2

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