2551: Salts of which of the following elements provide colours to fireworks?
(a) Zinc and sulphur
(b) Potassium and mercury
(c) Strontium and barium
(d) Chromium and nickel
2552: The chess player Alexi Shirov represents
(a) Albania
(b) Kazhakstan
(c) Russia
(d) Spain
2553: In the context of which one of the following arc the terms pyrolysis and plasma gasification mentioned?
(a) Extraction of rare earth elements
(b) Natural gas extraction technologies
(c) Hydrogen fuel-based automobiles
(d) Waste-to-energy technologies
2554: Influence of genes in controlling the activity of living organisms is through:
(a) Photosynthesis
(b) Protein synthesis
(c) Vitamins
(d) Hormones
2555: Which one of the following pairs is not correctly matched ?
(a) Jim Laker : Highest number of wickets in a Cricket Test match
(b) Brian Lara : Highest score in an innings in Test Cricket
(c) Sanath Jayasurya & Roshan Mahanama : Highest partnership in an innings in Test Cricket
(d) Sunil M. Gavaskar : Highest aggregate of runs in Test Cricket