Question

1. Chalk powder, common salt, oil and milk were added to water separately in four beakers. On stirring the contents the suspension would be obtained in the beaker containing

(a) chalk powder (b) common salt (c) oil (d) milk

2.

You are given following four mixtures. The mixture that appears clear and transparent is :

(a) starch in water (b) sugar in water (c) sand in water (d) chalk powder in powder


3.

Mohan heated a mixture of sulphur and iron filings in a china dish till a grey - black product was formed. On adding carbon disulphide and stirring the contents he observed that :

(a) particles of sulphur dissolve (b) particles of iron dissolve (c) grey black product dissolves (d) no change takes place

4.

When an iron nail is immersed in copper sulphate solution, the solution turns : (a) blue (b) green (c) reddish brown (d) colourless

5.To determine the melting point of ice a student immersed the bulb of the thermometer in the crushed ice in a beaker. He then heated the beaker on a low flame and observed that during melting of ice the temperature : (a) is increasing (b) is decreasing (c) first decreases and then continuously increases (d) remains constant

6.

In the experiment on to determine the boiling point of water while fixing thermometer care is taken that the bulb of the thermometer should : (a) be dipped in water (b) just touch the surface of water (c) be in steam (d) touch the pumice stone pieces placed at the bottom of the flask

7.The process used to separate ammonium chloride from a mixture of common salt, sand and 1 ammonium chloride is : (a) Filteration (b) Sublimation (c) Distillation (d) Evaporation

8. Which of the following characteristic of iron sulphide and mixture of iron filings+sulphur powder is correct ? (a) Both are heterogeneous

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(b) Both are homogeneous (c) A mixture of iron filing and sulphur powder may be heterogeneous or homogeneous but a iron sulphide is always homogeneous. (d) Iron sulphide is heterogeneous but the mixture of iron filings and sulphur powder is homogeneous.

9.When sodium sulphate solution is added to barium chloride solution barium sulphate is formed. It is a : (a) physical change (b) neither physical nor chemical change (c) chemical change (d) Both physical and chemical change

10.Out of sand, common salt and ammonium chloride the substance that dissolves in water is : (a) (a) sand only (b) common salt only (c) both sand and common salt (d) both common salt and ammonium chloride

11.A student soaked 1 g raisins in 7.5 mL of distilled water in two beakers A and B. He maintained beaker A at 208C and beaker B at 408C. After an hour, the percentage of water absorbed will be : (a) Same in beaker A and B (b) more in A than in B (c) more in B than in A (d) twice as much in B as in A

12.A student was observing an onion peel stained with safranin under the microscope. The colour of the cell wall appears : (a) Deep blue (b) Black (c) Pinkish red (d) Yellow

13.The reagent used to test a food substance for the presence of starch is — (a) iodine (b) methyl orange (c) methylene blue (d) safranin

14.The acid used to test the presence of metanil yellow in pulse is — (a) Hydrochloric acid (b) Nitric acid (c) Sulphuric acid (d) Citric acid

15.Human cheek cells stained in methylene blue and mounted in glycerine were observed with the help of a compound microscope. The components of the cell which would be seen are : (a) cell wall, cytoplasm, nucleus (b) plasma membrane, cytoplasm, nucleus (c) plasma membrane, cytoplasm, nucleus, mitochondria (d) plasma membrane, cytoplasm, nucleus, mitochondria, golgi bodies, lysosomes

16.Which of the following tissue consists of relatively unspecialised living cells with thin cell wall and inter cellular spaces. (a) Parenchymatous tissue (b) Collenchymatous tissue (c) Sclerenchymatous tissue (d) Meristematic tissue

17.A student was asked to identify the process which occurs when the raisins are soaked in water. This process is : (a) Osmosis (b) Plasmolysis (c) Endocytosis (d) Diffusion

18.Pick the odd one out of the following labellings on a diagram made after observing a slide : (a) Cell body (b) Axon (c) Light and Dark bands (d) Dendrites........



please reply fast.. :-)

Answer 1

1. oil
2.sand in water
3.particles of sulphur dissolve
4.clourless
5.is decreasing
6.be in steam
7.evaporation
8.both are hetrogenous
9.chemical change.
10.common salt only
11.twice as much be A as the B
12.yellow
13.methyline blue
14.sulpuric acid
15.cell wall ,cytoplasm,nucleus
16.collencymatus tissue
17.endocytosis
18.cell body

Answer 2

Answer:

yes the answer is correct given by that guy