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201.

What is the difference between a true solution and s suspension ?

Answer» The solute particles of a true solution do not settle down on standing , whereas the particles of a suspension do .
202.

The pH of milk lies betweenA. 6.6 and 6.9B. 2.6 and 4.4C. 7.0 aned 7.5D. 7.3 and 7.4

Answer» Correct Answer - A
203.

The pH values of three acid solutions A, B and C are 1 , 0 and 2 respectively. The order of their acid strength isA. A lt B lt CB. `B gtAgt C`C. C lt A lt BD. C lt B lt A

Answer» Correct Answer - C
204.

Name any three substances which form true solutions when dissolved in water ?

Answer» Sodium chloride , sugar and alum .
205.

Two solutions A and B have pH 3 and 5 respectively.

Answer» Correct Answer - A
206.

What harm can be caused by food adulteration ?

Answer» Several diseases in human beings, and even death may be caused by consuming adulterated food.
207.

Name some common sources of protein.

Answer» Pulses ,eggs and milk
208.

What are the examples of simple permanent tissue ?

Answer» Parenchyama , collenchyma and sclerenchyma.
209.

What is the difference between meristematic and permanent tissue ?

Answer» Meristematic tissue cells are capable of dividing, while permanent tissue cells are not.
210.

Name the plant parts where paranchymatous cells are present.

Answer» Parenchymatous cells are present in the soft parts of root, stem, leaves, flowers and fruits.
211.

Name the plant tissue which is mainly responsible for mechanical strength

Answer» Correct Answer - Sclerenchyma
212.

Which of the following statements is valid for a mixture ?A. It is always homogeneous .B. The components do not have their individuals properties .C. The components retain their individual properties .D. none of the above

Answer» Correct Answer - C
213.

Pick the correct sentence from the following .A. A mixture has a fixed melting point and boiling point .B. A compound is formed by the combination of two or more elements in a definite ratio by mass .C. A mixture is always heterogeneous .D. A compound does not have a fixed melting point .

Answer» Correct Answer - B
214.

Which of the following statements is correct ?A. In a mixture the component are present in a definite ratio by mass .B. The boiling point of water is uncertain .C. A compound is formed by the combination of two or more elemnts in a definite ratio by mass .D. Gunpowder melts at a particular temperature .

Answer» Correct Answer - C
215.

Which of the following statements is valid for a compound ?A. It is heterogeneous throughout .B. Its components are visible to the naked eye .C. It melts at a definite temperature .D. none of the above

Answer» Correct Answer - C
216.

Which of the following statements is valid for a compound ?A. It is heterogeneous throughout .B. Its compounds are visible to the naked eye.C. It melts at a definte temperature .D. none of the above

Answer» Correct Answer - B
217.

Calyx and corolla are known asA. essential whorlsB. accessory whorlsC. secondary whorlsD. reproductive whorls

Answer» Correct Answer - B
218.

Why do we keep the onion peel on a drop of water ?A. To keep the cells living and transparentB. To prevent displacement of the specimenC. To make the cells largerD. None of these

Answer» Correct Answer - A
219.

On adding a drop of iodine solution to an onion peel ,A. the cells will shrinkB. the cells will swell upC. the cells will turn yellowD. the food stored as starch in the cells will turn blue-black in colour

Answer» Correct Answer - D
220.

On adding a drop of iodine solution to an onion peel ,A. the cells will shrinkB. the cells will swell upC. the cell will turn yellowD. the food stored as starch in the cells will turn blue-black in colour

Answer» Correct Answer - D
221.

Why do we cover the onion peel placed on a glass slide with a coverslip ?A. To protect the objective of the microscopeB. To protect the onion peel cellsC. To protect the glass slideD. To focus the specimen

Answer» Correct Answer - A
222.

Which type of cells are there in the onion peel ?A. Guard cellsB. Oval cellsC. Epidermal cellsD. None of these

Answer» Correct Answer - C
223.

An onion is a modifiedA. rootB. stemC. leafD. rhizome

Answer» Correct Answer - B
224.

What are the reproductive organs in a flower?

Answer» Stamen and carpel
225.

Flower is a modifiedA. vegetative budB. leafC. shootD. axis

Answer» Correct Answer - C
226.

The basal swollen portion of the pistil is calledA. filamentB. ovaryC. stigmaD. anther

Answer» Correct Answer - B
227.

Which of the following constitute male reproductive part of a flower ?A. CalyxB. CorollaC. AndroeciumD. Gynoecium

Answer» Correct Answer - C
228.

What is perianth ?

Answer» It is the outer part of monocot flower in which calyx and corolla are not always distinguishable .
229.

Where are perianth found ?

Answer» In monocot flowers
230.

Name the outermost whorl of a flower

Answer» Correct Answer - Calyx
231.

Why are plant cells regular in shape ?

Answer» Plant cell are regular as they are surrounded by a thick and rigid cell wall.
232.

The solution of a substance in water is slippery. It combines with an acid to produce a salt. The subtance isA. an acidB. a saltC. a baseD. none of these

Answer» Correct Answer - C
233.

VENATION

Answer» The arrangement of veins and veinlets on the lamina is called venation.
234.

Parallel venation is the characteristics ofA. dicot leavesB. monocot leavesC. both dicot and monocot leavesD. None of these

Answer» Correct Answer - B
235.

Where do earthworms live ?A. In cowdungB. In the soilC. In the intestine of birdsD. In human excreta

Answer» Correct Answer - B
236.

The floral part are usually pertamerous (5 in number) inA. dicotsB. monocotsC. gymnospermsD. All of these

Answer» Correct Answer - A
237.

All the floral parts are arranged onA. petioleB. thalamusC. stamenD. petals

Answer» Correct Answer - B
238.

Intercellular spaces are usually found betweenA. parenchyma cellsB. collenchyma cellsC. sclerenchyma cellsD. None of these

Answer» Correct Answer - A
239.

When a true solution is filteredA. the filtrate obtained is turbidB. a solid residue is left on the filter paperC. the solute gets separated from the solventD. the filtrate is as good as the true solution .

Answer» Correct Answer - D
240.

which of the following is least soluble in water ?A. Common saltB. GlucoseC. Potassium chlorideD. Egg albumen

Answer» Correct Answer - A
241.

A true solution of cane sugar is prepared by dissolvingA. cane sugar in waterB. cane sugar in dilute HClC. cane sugar in aqua regiaD. cane sugar in sea water

Answer» Correct Answer - A
242.

Which of the following statements is correct ?A. A sparrow is smaller than a pigeonB. Crows and ravens belong to the same speciesC. A kingfisher is larger than an ostrichD. The beak of a parrot is stronger than that of a kite

Answer» Correct Answer - A
243.

Which of the following statements is correct ?A. All birds can see well at nightB. A swan has to constantly move its legs to float in waterC. Birds lays eggs in waterD. Some water are cold-blooded.

Answer» Correct Answer - B
244.

Which of the following statements is correct ?A. All birds can see well at nightB. A swan has to constantly move its legs to float in waterC. Birds lay eggs in waterD. Some birds are cold-blooded

Answer» Correct Answer - B
245.

Which of the following statements is correct ?A. All birdds have special vocal sacs called syrin.B. All bird sing equally well.C. All birds display courtship equally well.D. All birds have solid , heavy bones

Answer» Correct Answer - A
246.

Which of the following statements is correct ?A. All birds have special vocal sacs called syrinxB. All birds sing equally wellC. All birds display courtship equally wellD. All birds have solid, heavy bones

Answer» Correct Answer - A
247.

Birds lackA. scalesB. urinary bladderC. wingsD. air sacs

Answer» Correct Answer - B
248.

Flightless birds areA. very lightB. very heavyC. lighter than game birdsD. totally wingless

Answer» Correct Answer - B
249.

Which of the following statement is correct ?A. A sparrow is smaller than a pigeon.B. Crows and ravens belong to the same species.C. A kingfisher is larger than an ostrichD. The beak of a parrot is stronger than that of a kite.

Answer» Correct Answer - A
250.

The general formula of carbodxylic acids isA. R-- CHOB. R - COORC. R- COOHD. R-O-R

Answer» Correct Answer - C