Sunday 13 September 2015

CBSE Class 10 - Science - 1 Mark Questions Asked in Previous Question Papers (SA1 2012-2014)

Class X Science - SA1 - 1 Mark Questions

CBSE Class 10 - Science - 1 Mark Questions Asked in Previous Question Papers (SA1 2012-2014)

Questions Asked in Question Papers From 2012 To 2014

Q1 (2012): Name the sensory receptor found in the nose.

Answer: Olfactory receptors to detect the smell

Q2(2012): Name the sensory receptor found on the tongue.

Answer: Gustatory receptor to detect taste.

Q3(2012): Mention the angle between a current carrying conductor and magnetic field for which the force experienced by this current conductor placed in the magnetic field is the largest.

Answer: The force will be the largest when current carrying conductor and magnetic field direction is at a right angle to each other.

Q4(2012): Name a metal which is preserved in kerosene.

Answer: Sodium

Q5(2012): Name a metal which can melt while kept on a palm.

Answer: Gallium and Cesium

Q6(2012): Name the part of the brain which controls voluntary action.

Answer: Cerebrum or Forebrain

Q7(2012): Why is the outer surface of a solar cooker blackened?

Answer: The outer surface of a solar cooker is blackened because black colour absorbs heat from sun rays.

Q8(2012): Give an example of amphoteric oxide

Answer: Aluminium Oxide (Al2O3)

Q9(2013): Mention any one reason due to which most of the thermal power plants are set up near coal or oil fields.

Answer: It is more economical to transmit electricity over long distances than carrying coal or oil over the same distance.

Q10(2013): Name two tissues which provide control and co-ordination in animals.

Answer: Nerves and Muscular tissues.

Q11(2013): Give an example of ore from which metal is extracted by calcination.

Answer: Carbonate ores (eg ZnCO3)

Q14(2013): Name the organ which secretes a hormone to regulate blood sugar level. Name the hormone also,

Answer: Pancreases which releases insulin.

Q15(2013): Name three fossil fuels.

Answer: Coal, Petrol and Diesel.

Q16(2014): Name the two components of the peripheral nervous system.

Answer: Autonomous Nervous System and the Somatic Nervous System

Q17(2014): What are the hot spots?

Answer: The earth undergoes geological changes due to which molten rocks formed in deeper regions of the earth crust pushed upwards. These regions where heat and steam are trapped are called hot spots.

Q18(2014): A charge of 150 C flows through a wire for a minute. Find the current flowing through it.

Answer: Charge Q = 150 C, Time t = 1 minute = 60 secs. Current I = Q/t = 150/60 = 2.5 A

Q19(2014):  Why dry HCl gas does not turn dry blue litmus paper red?

Answer: Because dry HCl gas does not ionize into H+ ions.

Q20(2014): What type of chemical reactions takes place in the digestion of food in the stomach?

Answer: Complex food is broken simpler form. It is a decomposition reaction.


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