Q1.A soap bubble shows colours when illuminated with white light. This is due to.
(a) diffraction
(b) polarisation
(c) interference
(d) reflection
Q2.Cancer is a disease where we find uncontrolled
(a) cell division
(b) cell swelling
(c) cell inflammation
(d) cell deformity
Q3.The chemical name of rat poison is
(a) zinc oxide
(b) potassium cyanide
(c) lead nitrate
(d) zinc phosphide
Q4.Litmus is obtained from
(a) a bacterium
(b) a fungus
(c) an alga
(d) lichen
Q5.Which of the following is not a greenhouse gas ?
(a) Hydrogen
(b) carbon dioxide
(c) Nitric oxide
(d) Chlorofluorocarbon
Q6.Flowerless plants are termed as
(a) Phanerogams
(b) Bryophytes
(c) Thallophytes
(d) Cryptogamous
Q7.Nutrients are recycled in the atmosphere with the help of certain microorganisms referred to as
(a) producers
(b) consumers
(c) decomposers
(d) None of these
Q8.The metal, which is a constituent of vitamin-B12 is
(a) iron
(b) magnesium
(c) zinc
(d) cobalt
Q9.The colour of human skin is produced by
(a) haemoglobin
(b) insulin
(c) adrenaline
(d) melanin
Q10.The enzymes are basically
(a) carbohydrates
(b) lipids
(c) proteins
(d) amino acids
Solutions:
S1.Ans.(c)
S2.Ans.(a)
S3.Ans.(d)
S4.Ans.(d)
S5.Ans.(a)
S6.Ans.(d)
S7.Ans.(c)
S8.Ans.(d)
S9.Ans.(d)
S10.Ans.(c)
