Q.11)-The metal that is used as a catalyst in the hydrogenation of oils is
- Ni
- Pb
- Cu
- Pt
Q.12)-The most abundant rare gas in the atmosphere is
- He
- Ne
- Ar
- Xe
Q.13)-The ore which is found in abundance in India is
- monazite
- fluorspar
- bauxite
- magnetite
Q.14)-What are the number of moles of CO2 which contains 16 g of oxygen?
- 0.5 mole
- 0.2 mole
- 0.4 mole
- 0.25 mole
Q.15)-The monomer of polythene is
- vinyl chloride
- ethylene
- ethyl alcohol
- None of the above
Q.16)-The luster of a metal is due to
- its high density
- its high polishing
- its chemical inertness
- presence of free electrons
Q.17)-The most malleable metal is
- platinum
- silver
- iron
- gold
Q.18)-The oil used in the froth floatation process is
- coconut oil
- olive oil
- kerosene oil
- pine oil
Q.19)-The number of waves in n x 10th Bohr's orbit are
- n2
- n
- n-2
- n3
Q.20)-The material which can be deformed permanently by heat and pressure is called a
- thermoplastic
- thermoset
- chemical compound
- polymer
