CBSE Class 9 Biology Practical Skills MCQs Set B

Question: X was rushing with a bottle of iodine solution. Some iodine solution splashed on his yellow coloured cotton shirt and also on the white table cloth. The stain on the table cloth was yellowish brown while that on his shirt was blue black. The most plausible scientific reason for this is that the

a) Shirt was starched after washing

b) Shirt was dyed with metanil yellow

c) Table cloth was starched but not shirt

d) Shirt had absorbed sweat

Answer: Shirt was starched after washing

Question: Given below are 4 operations for testing metanil yellow in arhar dal.

(i) make powder of 5g of dal and put it in a test tube.

(ii) add 2-4 drops of conc. Hcl.

(iii) Filter the content and keep the filtrate separately.

(iv) add 10 ml of water and shake well. The correct sequence is

a) i iv iii ii

b) i iii ii iv

c) i ii iii iv

d) i ii iv iii

Answer: i iv iii ii

Question: Following are the 4 operations for testing presence of starch in rice (i) put few rice grains in a test tube (ii) add few drops of iodine solution (iii) add water in the test tube (iv) boil the test tube and filter the content. The correct sequence is

a) i iii iv ii

b) i ii iii iv

c) i ii iv iii

d) i iii ii iv

Answer: i iii iv ii

Question: Metanil yellow, an adulterant used in arhar dal is basically

a) A dye

b) A detergent

c) An acid

d) None of the above

Answer: A dye

Question: When iodine is added to starch solution, following colour appears

a) Blue-black

b) Brick red

c) Green

d) Magenta

Answer: Blue-black

Question: Adulterant arhar dal is plain yellow in colour due to

a) Metanil yellow

b) Sulphur powder

c) Chrome yellow

d) Turmeric

Answer: Metanil yellow

Question: The colour of arhar dal which is adulterated with metanil yellow, is

a) Plain yellow

b) Sunshine yellow

c) Chrome yellow

d) Brilliant yellow

Answer: Plain yellow

Question: Iodine gives blue-black colour with

a) Starch

b) Oil

c) Protein

d) Sucrose

Answer: Starch

Question: X washed small amount of arhar dal in small amount of water. The water became yellow. He put a few drops of hcl in a test tube containing yellow water. The sample turned pink. This shows that

a) Dal is adulterated with metanil yellow

b) Dal contains protein

c) Dal is not adulterated

d) Dal is coloured with turmeric

Answer: Dal is adulterated with metanil yellow

Question: What colour appears if HCL is added to adulterated arhar dal with metanil yellow

a) Blue

b) Yellow

c) Pink

d) Red

Answer: Blue

Question: Which of the following gives blue colour with iodine

a) Sago powder

b) Chalk powder

c) Common salt

d) Powdered sugar

Answer: Sago powder

Question: Which food sample you will select to test the presence of starch

a) Potato

b) Gram seed

c) Coconut

d) Grape

Answer: Potato

Question: Starch solution gives blue colour with iodine solution. What will happen if the blue colour starch solution is boiled

a) Blue colour disappears

b) No change

c) Blue colour becomes dark

d) A brick red colour appears

Answer: Blue colour disappears

Question: Which reagent gives blue colour with starch

a) Iodine

b) Eosin

c) Methylene blue

d) Safranin

Answer: Iodine

Question: Unbranched muscle fibre with characteristic striations are

a) Striated muscle fibres

b) Cardiac muscle fibres

c) Involuntary muscle fibres

d) Unstriated muscle fibres

Answer: Striated muscle fibres

Question: A permanent slide shows thin walled isodiametric cells with a large vacuole. The slide is

a) Parenchyma

b) Collenchyma

c) Sclerenchyma

d) Meristematic tissue

Answer: Parenchyma

Question: You are given 2 slides- parenchyma and sclerenchyma. Sclerenchyma can be identified by

a) Thickness of cell wall

b) Size of cells

c) Location of nucleus

d) Position of vacuoles

Answer: Thickness of cell wall

Question: Pick the odd one out

a) Sarcolemma

b) Nissls granule

c) Neurilemma

d) Axon

Answer: Sarcolemma

Question: Lignified elongated dead cells are

a) Sclerenchyma

b) Parenchyma

c) None of the above

d) Collenchyma

Answer: Sclerenchyma

Question: X labelled a parenchyma cell. Which of the marking is wrong

a) Thick cell wall

b) Nucleus

c) Vacuole

d) Intercellular space

Answer: Thick cell wall

Question: The sclerenchyma cells are

a) Thick walled

b) Thin walled

c) Without cell wall

d) None of the above

Answer: Thick walled

Question: Striated muscles are

a) All of these

b) Called skeletal muscle

c) Multinucleated

d) Cylindrical

Answer: All of these

Question: The cell body of a neuron contains a nucleus and cytoplasm and is called

a) Cyton

b) Nissls granule

c) Axon

d) Dendron

Answer: Cyton

Question: Dendrites are found in

a) Neuron

b) Nonstriated muscle

c) Cardiac muscle

d) Striated muscle

Answer: Neuron

Question: Striped muscles are

a) Multinucleate and unbranched

b) Uninucleate and spindle shaped

c) Uninucleate and branched

d) Multinucleate and branched

Answer: Multinucleate and unbranched

Question: Which one is dead cell

a) Sclerenchyma

b) Collenchyma

c) Chlorenchyma

d) Parenchyma

Answer: Sclerenchyma

Question: In transverse section, parenchymatous cells show

a) Thin walled cells with intercellular spaces

b) Dead cells

c) Thickening of cell wall

d) Absence of intercellular spaces and vacuoles

Answer: Thin walled cells with intercellular spaces

Question: A was observing a permanent slide of nervous tissue under a microscope. Name the kind of cells observed in nervous tissue

a) Neuron

b) Smooth muscle

c) Smooth muscle

d) Cardiac muscle

Answer: Neuron

Question: Safranin is a reagent that is used to stain

a) Cell wall

b) Cytoplasm

c) Nucleus

d) Plasmodesmata

Answer: Cell wall

Question: An epidermal cells of Rheo shows

a) Red epidermal cells and green guard cells

b) Green epidermal cells and red guard cells

c) Green epidermal and green guard cells

d) Red epidermal and red guard cells

Answer: Red epidermal cells and green guard cells

Question: Chewing mouth parts found in

a) Cockroach

b) Birds

c) Leech

d) Earthworm

Answer: Cockroach

Question: Which is an aerial adaptation

a) Hollow bones

b) Jointed legs

c) Cold-blooded

d) Scales on body

Answer: Hollow bones

Question: Identify- warm blooded, 4 chambered heart and oviparous

a) Birds

b) Bony fish

c) Cockroach

d) Earthworm

Answer: Birds

Question: Which is not an aquatic adaptation

a) All of the above characters

b) Presence of muscular tail

c) Gaseous exchange through gills

d) Skin is covered with scales

Answer: All of the above characters

Question: Most characteristic feature of earthworm to be in phylum annelida

a) Annuli

b) Clitellum

c) Anus

d) Peristomium

Answer: Annuli

Question: The common adaptive feature of bony fish

a) All the options

b) Have muscular tail for movement

c) Obtain dissolved oxygen of water using gills

d) Skin is covered with scales

Answer: All the options

Question: Identify the organism - the body is divided into head, thorax and abdomen having biting and chewing mouth parts

a) Cockroach

b) Pigeon

c) Earthworm

d) Fish

Answer: Cockroach