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

1. Very small time intervals are accurately measured by the
(a) Pulsars
(b) Quartz clocks
(c) Atomic clocks
(d) White dwarfs

2. Water is neither acidic nor alkaline because
(a) it cannot accept or donate protons.
(b) it boils at a high temperature.
(c) it can dissociate into equal number of hydrogen ions.
(d) it cannot donate or accept electrons.
3. Catalytic properties of a substance may be best defined as a phenomenon of ?
(a) Absorption
(b) Chemisorption
(c) Adsorption
(d) None of these
4. A substance which changes readily into vapour without heating is called ?
(a)efflorescent
(b) synthetic
(c) volatile
(d) effervescent
5. In the manufacture of safety matches, which of the following materials are used to coat the two sides of match boxes?
1. Yellow phosphorus
2. Glue
3, Glass powder
4. Red phosphorus
(a) l, 2 and 3
(b) l,3 and 4
(c) l,2 and 4
(d) 2,3and4
6. How does common salt help in separating soap from the solution after saponification?
(a) By decreasing solubility of soap
(b) By increasing solubility of soap
(c) By decreasing density of soap
(d) By increasing density of soap
7. The type of glass used in making lenses and prisms is?
(a) soft glass
(b) pyrex glass
(c)jena glass
(d) flint glass
8. Kilohertz is a unit of which of the following?
(a) electric resistance
(b) power used by a current of one ampere
(c) electromagnetic radio wave frequencies
(d) None of these
9. A chronometer measures
(a) sound waves
(b) time
(c) water waves
(d) colour contrast
10. Hydrometer is an instrument
(a) for measuring sound under water
(b) to detect the presence of hydrogen in the atmosphere
(c) for measuring the specific gravity of liquids
(d) to detect the changes in atmospheric humidity

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