General Science

Which is a thermosetting plastic?

  1. Melamine
  2. Polythene
  3. PVC
  4. Nylon

Polycot is obtained by mixing

  1. nylon and wool
  2. polyester and wool
  3. nylon and cotton
  4. polyester and cotton

Which of the following is a source of rayon?

  1. Wool
  2. PET
  3. Wood pulp
  4. Silk

The disease caused by a protozoan and spread by an insect is

  1. dengue
  2. malaria
  3. polio
  4. measles

The two micro-organisms which live in symbiotic association in lichens are

  1. fungus and protozoa
  2. alga and bacteria
  3. bacteria and protozoa
  4. alga and fungus

A disease in human beings caused by virus is

  1. typhoid
  2. influenza
  3. dysentry
  4. cholera

Which of the following reproduces only inside a host cell?

  1. Bacteria
  2. Virus
  3. Amoeba
  4. Fungus

The branchy part of a tree above the stem is known as

  1. crown
  2. canopy
  3. sapling
  4. humus

The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene per person per day is a minimum of

  1. 5 litres
  2. 15 litres
  3. 30 litres
  4. 50 litres

On which of the following day is World Water Day observed?

  1. 22 March
  2. 14 November
  3. 2 October
  4. 21 December

An erect and enlarged image can be formed by

  1. only a convex mirror
  2. only a concave mirror
  3. only a plane mirror
  4. both convex and concave mirrors

If an object is placed at a distance of 0.5 m in front of a plane mirror, the distance between the object and the image formed by the mirror will be

  1. 2 m
  2. 1 m
  3. 0.5 m
  4. 0.25 m

Which of the following can be used to form a real image?

  1. Concave mirror only
  2. Plane mirror only
  3. Convex mirror only
  4. Both concave and convex mirrors

A bus travels 54 km in 90 minutes. The speed of the bus is

  1. 0.6 m/s
  2. 10 m/s
  3. 5.4 m/s
  4. 3.6 m/s

Pollination refers to the

  1. transfer of pollen from anther to ovary
  2. transfer of male gametes from anther to stigma
  3. transfer of pollen from anther to stigma
  4. transfer of pollen from anther to ovule

The eye of the potato plant is what

  1. the root is to any plant
  2. the bud is to a flower
  3. the bud is to Bryophyllum leaf
  4. the anther is to stamen

Seeds of drumstick and maple are carried to long distances by wind because they possess

  1. winged seeds
  2. large and hairy seeds
  3. long and ridged fruits
  4. spiny seeds

Which of the following parts of a plant take part in sexual reproduction?

  1. Flower
  2. Seed
  3. Fruit
  4. Branch

Choose the correct answer from below.

  1. (i) and (ii)
  2. (i), (ii) and (iii)
  3. (iii) and (iv)
  4. (ii), (iii) and (iv)

Aquatic animals like fish excrete their wastes in gaseous form as

  1. Oxygen
  2. Hydrogen
  3. Ammonia
  4. Nitrogen

In which of the following parts of human body are sweat glands absent?

  1. Scalp
  2. Armpits
  3. Lips
  4. Palms

The absorption of nutrients and exchange of respiratory gases between blood and tissues takes place in

  1. veins
  2. arteries
  3. heart
  4. capillaries

During the process of exhalation, the ribs move

  1. down and inwards
  2. up and inwards
  3. down and outwards
  4. up and outward

Yeast is used in wine and beer industries because it respires

  1. aerobically producing oxygen
  2. aerobically producing alcohol
  3. anaerobically producing alcohol
  4. anaerobically producing CO2

The coldest region on earth is the

  1. polar region
  2. tropical region
  3. temperate region
  4. coastal region

Galvanisation is a process used to prevent the rusting of which of the following?

  1. Iron
  2. Zinc
  3. Aluminium
  4. Copper

Which of the following set of substances contain acids?

  1. Grapes, lime water
  2. Vinegar, soap
  3. Curd, milk of magnesia
  4. Curd, vinegar

Litmus, a natural dye is an extract of which of the following?

  1. China rose (Gudhal)
  2. Beetroot
  3. Lichen
  4. Blue berries (Jamun

When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?

  1. Organic matter
  2. Quick lime
  3. Slaked lime
  4. Calamine solution

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are

  1. red and blue.
  2. blue and red.
  3. pink and colourless.
  4. colourless and pink.

Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed

  1. Yellow in both acid and base.
  2. Yellow in acid and red in base.
  3. Pink in acid and yellow in base.
  4. Red in acid and blue in base.

Products of a neutralisation reaction are always

  1. an acid and a base.
  2. an acid and a salt.
  3. a salt and water.
  4. a salt and a base.

A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile

  1. is a better conductor of heat than the wooden tile.
  2. is polished while wooden tile is not polished.
  3. reflects more heat than wooden tile.
  4. is a poor conductor of heat than the wooden tile.

Reeling of silk is

  1. a process of making silk reels.
  2. spinning of silk fibres.
  3. weaving of silk cloth.
  4. the process of taking silk threads from cocoon.

Silkworms secrete fibre made of

  1. fat
  2. cellulose
  3. protein
  4. nylon

Selective breeding is a process of

  1. selecting the offsprings with desired properties.
  2. selecting the parents with desired properties.
  3. selecting an area for breeding.
  4. selecting fine hair for good quality wool.

Wool fibre cannot be obtained from which of the following?

  1. Goat
  2. Llama
  3. Alpaca
  4. Moth

Silk fibre is obtained from

  1. fleece of sheep
  2. cotton ball
  3. cocoon
  4. shiny jute stalk

Which of the following is not a type of silk?

  1. Mulberry silk
  2. Tassar silk
  3. Mooga silk
  4. Moth silk

The rearing of silkworms for obtaining silk is called

  1. cocoon
  2. silk
  3. sericulture
  4. silviculture

Cud is the name given to the food of ruminants which is

  1. swallowed and undigested.
  2. swallowed and partially digested.
  3. properly chewed and partially digested.
  4. properly chewed and completely digested.

The enzymes present in the saliva convert

  1. fats into fatty acids and glycerol.
  2. starch into simple sugars.
  3. proteins into amino acids.
  4. complex sugars into simple sugars.

The false feet of Amoeba are used for

  1. movement only.
  2. capture of food only.
  3. capture of food and movement.
  4. exchange of gases only.

The acid present in the stomach

  1. kills the harmful bacteria that may enter along with the food.
  2. protects the stomach lining from harmful substances.
  3. digests starch into simpler sugars.
  4. makes the medium alkaline.

The swallowed food moves downwards in the alimentary canal because of

  1. force provided by the muscular tongue.
  2. the flow of water taken with the food.
  3. gravitational pull.
  4. the contraction of muscles in the wall of food pipe.

Pitcher plant traps insects because it

  1. is a heterotroph.
  2. grows in soils which lack in nitrogen.
  3. does not have chlorophyll.
  4. has a digestive system like human beings.

In the absence of which of the following will photosynthesis not occur in leaves?

  1. Guard cells
  2. Chlorophyll
  3. Vacuole
  4. Space between cells

Organisms which prepare food for themselves using simple naturally available raw materials are referred to as

  1. heterotrophs
  2. autotrophs
  3. parasites
  4. saprophytes

The method of preparing compost with the help of earthworms is called

  1. composting
  2. vermicomposting
  3. manuring
  4. decomposing

Which of the following components of air is present in the largest amount in the atmosphere?

  1. Nitrogen
  2. Oxygen
  3. Water vapour
  4. Carbon dioxide

Mountaineers carry oxygen cylinders with them because

  1. there is no oxygen on high mountains.
  2. there is deficiency of oxygen on mountains at high altitude.
  3. oxygen is used for cooking.
  4. oxygen keeps them warm at low temperature.

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