Which test tube has the highest concentration?
Test tube A consists of snail which continuously uses the oxygen produced and releases carbon dioxide. Hence, test tube A will have the highest concentration of carbon dioxide.
Why snail is kept in test tube B?
(iv) In test tube B, a plant and a snail are kept. The plant in test tube B has more concentration of CO2 available because the snail releases CO2 during respiration. This increases the rate of photosynthesis in the plant placed in test tube B which leads to the release of more amount of oxygen.
Why does test tube B has more bubbles of oxygen?
(iv) Test tube B have more bubbles of oxygen because the rate of photosynthesis is more in test tube B as it gets more CO 2 from the snail. (v) Hydrilla is a water plant which is used for such experiments.
What happens to the test tube a test tube B and test tube C?
Answer. because rusting occurs both due to water and oxygen. in test tube a it is covered by oil hence oxygen cannot reach the nail so it won’t get rusted. in test tube c anhydrous calcium chloride is present which absorbs the moistness hence oxygen alone cannot rust the nail.
Which test tube would contain the most amount of co2 and why?
Test tube A
Test tube A will have the highest concentration of CO2 because the snail will take in oxygen and gives out CO2.
What gas is released from the plant in the test tube?
Place a leaf from a plant in a stoppered boiling tube containing some hydrogen carbonate indicator. You can then investigate the effect of light over a period of a few hours. The table shows some typical results. Plant cells respire in the light and the dark, releasing carbon dioxide.
What is the role of light in photosynthesis?
During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Which gas is released in test tube A and B?
(a) Carbon dioxide is released in test tube A. Hydrogen gas is released in test tube B.
Why do small bubbles of lime appear in the small test tube?
The carbon dioxide gas produced in big test tube passes through bent gas delivery tube to the small test tube containing lime water. Hence, bubbles are seen in the small test tube. Lime water turns milky.
Does boiled water cause corrosion?
A metal object corrodes when it is exposed to the open air and bad weather. If the metal is iron, we call this change rusting, and the weaker, flaky brown compound that is formed is rust….Corrosion.
| Test tube | Conditions | Result |
|---|---|---|
| A | Boiled water and oil layer | No rust. Boiled water has no oxygen and oil stops new oxygen entering. |
In which test tube rusting will take place?
Rusting of iron takes place only in presence of oxygen and water vapours. In figure (c) rusting is not possible as supply of oxygen is blocked by oil layer.
What is the highest concentration of CO2?
On April 3, the Mauna Loa Observatory in Hawaii measured average atmospheric carbon dioxide to be 421.21 parts per million. This is the first time in human history that CO2 concentration has exceeded 420 ppm, which means that humans have reached the halfway point of doubling pre-industrial CO2 levels.
What is always true about the total amount of oxygen and carbon dioxide in the test tube?
What is always true about the total amount of oxygen and carbon dioxide in the test tube? The total of the O2 and CO2 in the test tubes always stayed the same.
How do you know if a plant produces oxygen?
1) Yes, if you illuminate a plant (I presume you are using an aquatic/water plant) it will produce oxygen. You can put the plant under a funnel and collect the bubbles in an upturned test tube. If the gas is collected fresh, it will relight a glowing splint.
Which gas is released in the test tube?
Oxygen gas is formed in the tube connected to the positive electrode. Hydrogen gas is produced in the tube connected to the negative electrode. The process produces twice as much hydrogen gas as oxygen gas. The hydrogen is collected in an upside-down test tube and put over a candle flame.
How can you test if carbon dioxide is present in a test tube?
It is important that the test for any gas or ion is unique….Summary.
| Test | Observation | Inference |
|---|---|---|
| Gas bubbled through limewater | Limewater turns milky or cloudy white | Carbon dioxide is present |
| Damp litmus paper held in a test tube | Paper turns white | Chlorine is present |
What is the Colour change in the lime water present in the small test tube?
The limewater test (CaO, lime, dissolved in water) is a classical testfor the presence of carbon dioxide. The carbon dioxide gas as it is bubbled through the limewater will react and form insoluble calcium carbonate and water. Hence the milky white color of the floating precipitate.
Which acid is present in the big test tube?
Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B.
Why does test tube B have more bubbles of oxygen?
Why is oil added to the test tube A and test tube B?
Oil is added over water in the test tube to ensure that no water loss takes place due to direct evaporation from the test tube and the required result obtained is correct.
What is the purpose of keeping a snail?
Snails are a very important part of the ecosystem and they sit near the bottom of the food chain. The snails can help clean up the environment by consuming rotting vegetation and certain types of fungi. They also act as a source of food to other animals.
What is the difference between test tube and boiling tube?
Test tubes are convenient containers for heating small amounts of liquids or solids with a Bunsen burner or alcohol burner. A boiling tube is a large test tube intended specifically for boiling liquids.
What is the test tube used for?
Chemical reaction
Test tube/Uses
What caused the aquatic plant to produce bubbles?
Tiny bubbles rising from an underwater plant’s leaves are oxygen. In a process called photosynthesis, plants use light energy to make food and oxygen from carbon dioxide and water. Though plants do use a small amount of this oxygen, most is released as waste.
Which is test-tube would have the highest concentration of CO2?
Take three test – tubes. Fill each of them with water. Label them A, B and C. Keep a snail in test – tube A, a water plant in test – tube B and in C, keep snail and plant both. Which test – tube would have the highest concentration of CO2 ? Take three test-tubes. Fill each of them with water.
What kind of plant is in test tube B?
Test-tube B contains both a green water plant and a snail. Both testtubes are kept in sunlight. Answer the questions that follow: (i) Name the physiological process that releases the bubbles of oxygen.
How to test C O2 in a test tube?
Take three test-tubes. Fill each of them with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of C O2
Take three test – tubes. Fill each of them with water. Label them A, B and C. Keep a snail in test – tube A, a water plant in test – tube B and in C, keep snail and plant both. Which test – tube would have the highest concentration of CO2 ? Take three test-tubes. Fill each of them with water.
How to keep a snail in a test tube?
Take three test- tubes.Fill 3/4 th of each with water.Label them A,B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of CO2. Tube C: Even though there is a snail that releases CO2, the plant will use it for photosynthesis.
Test-tube B contains both a green water plant and a snail. Both testtubes are kept in sunlight. Answer the questions that follow: (i) Name the physiological process that releases the bubbles of oxygen.
Take three test-tubes. Fill each of them with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of C O2
