MCQ
1 The synthetic fibre which resembles wool is ___________
Rayon (ii) nylon (iii) acrylic (iv) polyester
2 The process of conversion of vegetation into coal is called _____________
(i) Refining (ii) fractional distillation (iii) destructive distillation (iv) carbonisation
3 Which among the following has lowest ignition temperature?
Kerosene (ii) white phosphorous (iii) diesel (iv) paper
4 ______________ is a single cell which can change its shape.
(i) Red blood cell (ii) white blood cell (iii) nerve cell (iv) platelets
5 A girl pushes a box towards east direction. In which direction does friction acts?
(i)West (ii) East (iii) North (iv) south
6 Pressure equals__________________
(i)Force/volume (ii) Force X volume (iii) Force X Area (iv) Force /Area
7 A Process which is essential for the existence of life on the earth is ______________
(i)Greenhouse effect (ii) Global warming (iii) deforestation (iv) desertification
8 Which among the following is not a cause of air pollution?
(i)Automobile exhaust (ii) burning of fire wood (iii) wind mill (iv) power plant
9 Morning star is ______________
(i)Pole star (ii) Sirius (iii) Venus (iv) Mars
10 The weight of an object on Earth is 48 kg.It’s weight on moon is ____________
(i)48 kg (ii) 8 kg (iii) 6 kg (iv) 4.8kg
11 Muscle cells are
(i) branched (ii) spherical (iii) spindle shaped (iv) none of the above
12 Identify the thermosetting plastic in the following
(i) PVC (ii) Polythene (iii) Bakelite (iv) all of the above
13 Naphthalene balls are obtained from
(i) coke (ii) coal tar (iii) coal gas (iv) natural gas
14 The star nearest to us is
(i) Mercury (ii) The Pole star (iii) Sirius (iv) The Sun
15 Which among the following is a greenhouse gas
(i) carbon di oxide (ii) nitrous oxide (iii) methane (iv) all of the above
16 The control centre of a cell is
(i) plastid (ii) protoplasm (iii) cytoplasm (iv) nucleus
17 Ozone layer is damaged by the emission of
(i) CNG (ii) LNG (iii) KFC (iv) CFC
18 The wider tyres of the container trucks are for
(i) decreasing friction (ii) increasing pressure (iii) decreasing pressure ( iv) increasing friction
19 A pure form of carbon obtained by processing coal is
(i) coke (ii) coal gas (iii) coal tar (iv) gas carbon.
20 The brightest star in the night sky is
(i) sun (ii) alpha centaury (iii) pole star (iv) Sirius.
21 The substance that is non-biodegradable among these is
(i) silk (ii) wool (iii) polythene (iv) wood
22 Arrange the forces due to static, rolling and sliding frictions in a decreasing order.
(i) rolling, sliding, static (ii)sliding, static, rolling
(iii) static, sliding, rolling (iv) None of these
23 The powerhouse of the cell.
(i) cell wall (ii) lysosome (iii) mitochondria (iv) plastid
24 Which of the following is not a property of plastic?
(i) inflammable (ii) corrode and rust easily
(iii)poor conductors of electricity (iv) insoluble in water
25 Identify the one which is not a fossil fuel
(i) Diesel (ii) Petrol (iii) Compressed natural gas (iv) Biogas
26 Which of the following is not a planet of the sun?
(i) Sirius (ii) Mercury (iii) Saturn (iv) Earth
FILL IN THE BLANKS
27 __________ is a synthetic fibre that resembles wool.
28 Stars, planets and other objects in the sky are called__________ objects.
29 Heat and light in the sun are produced by__________ reactions.
30 The force exerted by a magnet is an example of __________ force.
31 A mixture of smoke and fog called__________ is seen during winters.
32 A force of 60 N is acting northward. The magnitude of this force is------------------------.
33 The outermost layer of a plant cell is --------------------------.
34 The trade name of artificial silk is --------------------------------.
35 The substances with very low ignition temperature are known as-------------substances
36 A planet that appears slightly red-------------------------------
37 Burning of -----------------causes the emission of sulphur dioxide.
38 The force acting on a unit area of a surface is called ……………..
39 A group of similar cells performing a specific function is called……………..
40 The first truly synthetic fibre is ………………
41 The substances which contaminate the air are called ……………..
42 A large number of small objects revolving around the sun between the orbits of Mars and Jupiter are called ………………
STATE ‘TRUE’ or ‘FALSE’
43 Plastic bags are biodegradable.
44 Rolling friction is smaller than sliding friction.
45 Forests are inexhaustible natural resources.
46 During explosion heat, light and sound are produced.
47 Chlorination is used to purify water.
48 Mars is called the Red Planet.
49 Friction depends on the nature of surfaces in contact.
50 A synthetic fibre that resembles wool is acrylic.
51 Fossil fuel can be made in the laboratory.
52 Candle and coal burn with a flame.
53 Van Mahotsav is held during the month of July.
54 Comets are made up of rocks.
55 Natural gas is marketed as LPG.
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