Q1. A colloidal system in which a liquid is dispersed in a liquid is called
(a) gel
(b) emulsion
(c) sol
(d) precipitate
Q2. Rutherford’s scattering experiment proved the presence of
(a) atoms in all matter
(b) electrons in atoms
(c) neutrons in atoms
(d) nucleus in atoms
Q3. The chemical formula of the laughing gas is
(a) NO
(b)N_2 O
(c) NO_2
(d) N_2 O_3
Q4. Heavy water is so called because it contains
(a) Heavy isotope of hydrogen
(b) Heavy isotope of oxygen
(c) Mole number of hydrogen atoms
(d) Mole number of oxygen atoms
Q5. In a period from Li to F, ionization potential
(a) cannot be predicted
(b) increases
(c) decreases
(d) remains same
Q6. Acid rain is caused by
(a) SO_2 and particulates
(b) NO_2 and particulates
(c) CO_2 and CFCs
(d) SO_2andNO_2
Q7. An element of atomic no. 29 belongs to
(a) s-block
(b) d-block
(c) p-block
(d) f-block
Q8. Neutrons are slowed down in a nuclear reactor by
(a) Fissionable material
(b) Moderator
(c) Control rods
(d) Cooling system
Q9. The Origin of Species was written by..
(a) Charles Darwin
(b) Lemark
(c) Lawasiye
(d) None of these
Q10. The heaviest naturally occurring element is:
(a) Mercury
(b) Polonium
(c) Thorium
(d) Uranium
Q11. Which of the following elements is not radio-active?
(a) Radium
(b) Plutonium
(c) Zirconium
(d) Uranium
Q12. An alloy used in making heating elements for electric heating device is
(a) Solder
(b) Alloy Steel
(c) Nichrome
(d) German Silver
Q13. Natural rubber is a polymer of
(a) Vinyl acetate
(b) Propene
(c) Isoprene
(d) Styrene
Q14. Nylon is made up of :
(a) Polyamide
(b) Polyester
(c) Polyethylene
(d) Polypropylene
Q15. How many bones are there in a newly born infant?
(a) 206
(b) 230
(c) 280
(d) 300
CRACK SSC CGL 2017
