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Science (Mixed) Quiz Based on NCERT for SSC 2016 Quiz

Science (Mixed) Quiz Based on NCERT for SSC 2016 Quiz_40.1
1. During a chemical reaction, the sum of the masses of the reactants and products remains unchanged. This is known as
A. Law of conservation of mass
B. Law of multiple proportion
C. Law of constant proportion
D. None of these

2. Sample of water from a well was analyzed. What will be the ratio of hydrogen and oxygen in it by mass?
A. 8:1
B. 1:8
C. 2:16
D. both b and c
3. Identify incorrect statement?
A. Atoms of the same element may have different masses
B. Atoms have been found to be made up of sub atomic particles.
C. Atoms of different elements may have same masses.
D. None of these
4. Suppose a planet starts shrinking the value of ‘g’ starts—
A. decreasing
B. increasing
C. becomes zero.
D. remains the same 
5. Nylon absorbs very little water hence it is most suitable for making which of the following?
A. parachute
B. fishing net 
C. tyre cords
D. all of these
6. All kinds of fibres are—
A. polymers
B. pentamers
C. monomers
D. dimers
7. Why Bakelite do not melt on heating?
A. polymers are poor conductors of heat
B. polymers are attached by strong linear chains
C. polymers are joined by strong cross links
D. polymers are strong and inexpensive
8. Rainbow is formed due to which of the following?
A. Reflection of light by water droplets
B. Refraction of light through air
C. Dispersion of light by water droplets
D. All of these
9. Which type of mirror always forms virtual, erect and image of same size?
A. Convex mirror
B. Concave mirror
C. Plane mirror
D. Biconcave mirror
10. Why dentist use concave mirror?
A. It form Inverted image
B. It form Erect image
C. It form Magnified image
D. It form Diminished image

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