1051. Which one of the following sets of colour combination is added in colour vision in TV?

A. Red,green and blue *
B. Orange, black and violet
C. White, red and yellow
D. Yellow, green and blue

1052. A train goes past a railway station at a high speed. A young boy standing on the edge of the platform is likely to _________.

A. Remain unaffected
B. Fall away from the train
C. Fall towards the train *
D. Fall away from or towards the train depending upon the speed.

1053. Water is a highly effective coolant for a car engine because ___________.

A. Water is good conductor of heat *
B. Water has very high specific heat capacity
C. Water boils at a comparatively high temperature
D. Evaporation of water produces lots of cooling

1054. Scalding with steam is more severe than scalding by boiling water because __________.

A. Steam can penetrate the skin
B. Steam is at a higher temperature
C. Steam contains more energy than boiling water *
D. steam is at a higher pressure

1055. In order to prevent the corrasion of iron pipes they are often coated with a layer of zin. This process is termed as ________.

A. Electroplating
B. Annealing
C. Galvanisation *
D. Vulcanisation

1056. The cracking sound heard when dry hair is combed with a hard rubber come is due to ________.

A. The hair barging against the charged comb
B. Small electric sparks
C. The rubbing of the comb with the hair
D. None of the above *

1057. Detergent dissolved in water help in cleaning clothes by __________.

A. Increasing the temperature of water
B. Reacting chemically with dirt
C. Reducing the surface tension of water *
D. Dissolving dirt

1058. The absorption of ink by blotting paper involves _________.

A. Viscosity of ink
B. Capibiliary action phenomenon *
C. Diffusion of ink through the blotting
D. Siphon action

1059. Materials for rain-proof coats and tents owe their water proof properties to ________.

A. Surface tension *
B. Viscosity
C. Specific gravity
D. Elasticity

1060. A satellite moving round the earth with a uniform speed has _________.

A. An acceleration motion
B. No acceleration motion
C. Uniform acceleration *
D. Uneven acceleration