The colour of the solution observed after 30 minutes of placing zinc metal to copper sulphate solution is a) Blue b) Colourless c) Dirty green d) Reddish Brown
On adding dilute sulphuric acid to a test tube containing a metal „X‟, a colourless gas is produced when a burning match stick is brought near it. Which of the following correctly represents metal „X‟? a) Sodium b) Zinc c) Copper d) Silver
An element with atomic number_____ will form a basic oxide. a) 7 (2,5) b) 17 (2,8,7) c) 14 (2,8,4) d) 11 (2,8,1)
Generally food is broken and absorbed within the body of organisms. In which of the following organisms is it done outside the body? a) Amoeba b) Mushroom c) Paramoecium d) Lice
Receptors are usually located in sense organs. Gustatory receptors are present in a) tongue b) nose c) eye d) ear
A farmer wants to grow banana plants genetically similar enough to the plants already available in his field. Which one of the following methods would you suggest for this purpose? a) Regeneration b) Budding c) Vegetative propagation d) Sexual reproduction
Height of a plant is regulated by: a) DNA which is directly influenced by growth hormone. b) Genes which regulate the proteins directly. c) Growth hormones under the influence of the enzymes coded by a gene. d) Growth hormones directly under the influence a gene
A sportsman, after a long break of his routine exercise, suffered muscular cramps during a heavy exercise session. This happened due to: a) lack of carbon dioxide and formation of pyruvate. b) presence of oxygen and formation of ethanol. c) lack of oxygen and formation of lactic acid. d) lack of oxygen and formation of carbon dioxide
An object is placed in front of a convex mirror. Its image is formed : a) at a distance equal to the object distance in front of the mirror. b) at twice the distance of the object in front of the mirror. c) half the distance of the object in front of the mirror. d) behind the mirror and it‟s position varies according to the object distance.
When light enters the atmosphere it strikes on extremely fine particles, which deflect the rays of light in all possible directions, This is due to – a) reflection of light b) atmospheric refraction c) scattering of light d) dispersion of light
Which of the following features relates to biodegradable substances? a) Broken down by biological processes b) Remain inert c) Persist in environment for long time d) May harm the ecosystem
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