Priestly's Experiments

Q. Oxygen was discovered by

1. Von Sachs
2. Theodore de Saussure
3. Joseph Priestley
4. Jan Ingenhousz

Q. How Priestley would have conducted the experiment using a candle and a plant?

Q. Name the scientist, who first pointed out that plants purify foul air by bell jar experiment.

1. Willstatter
2. Robert Hooke
3. Priestley
4. Jean Senebier

Q. Can you imagine how Priestley would have conducted the experiment using a candle and a plant? Remember he would need to rekindle the candle to test whether it burns after a few days. How many different ways can you think of to light the candle without disturbing the set-up?

Q. Which phytohormone is responsible for the promotion of female flowers in cucumber?

1. $ABA$
2. $G{A}_3$
3. $C_2{H}_2$
4. $C_2{H}_4$

Q. Joseph Priestly performed the famous bell jar eperiment to prove that

1. Plants consume oxygen
2. Plants consume canbon dioxide
3. Plants produce oxygen
4. Plants produce carbon dioxide

Q. What is Glucocorticoids?

Q. Who proved that plant purify the air and animals make the air impure?

1. Stephen Hales
2. Priestley
3. Ingenhousz
4. Von Helmont

Q. The first person to show that plants produced oxygen was

1. Engelmann
2. van Niel
3. Ingenhousz
4. Priestly

Q. Who demonstrated the role of light in plant nutrition?

1. Stephen Hales
2. Von Helmont
3. None of the above
4. Priestley

Q. From what kind of tree is turpentine obtained?

1. From grasses only
2. From most trees
3. From oil wells
4. Most kinds of pine trees

Q. A hatching egg of chick is covered by plaster of paris. It is harmful for

1. Mother
2. Excretion
3. Respiration
4. None of the above

Q. Joseph Priestly performed the famous bell jar eperiment to prove that

1. Plants consume canbon dioxide
2. Plants produce oxygen
3. Plants produce carbon dioxide
4. Plants consume oxygen

Q. Oxygen was discovered by

1. Jan Ingenhousz
2. Von Sachs
3. Theodore de Saussure
4. Joseph Priestley

Q. To recreate Priestly's experiment, which of the following are required along with a bell jar?

1. Candle
2. Mouse
3. Plant
4. All of the above

Q. Pigment system is concerned with:

1. Photolysis of water
2. Reduction of $C{O}_2$
3. Flowering
4. Seed germination

Q. To recreate Priestly's experiment, which of the following are required along with a bell jar?

1. Candle
2. Mouse
3. Plant
4. All of the above

Q. Circle the odd one.

1.	Neem	Amla	Bamboo	(Hint: It is not used to make medicine.)
2.	Green chilly	Ginger	Turmeric	(Hint: It is not an outgrowth to produce a new plant.)
3.	Grapes	Rose	Jasmine	(Hint: It can grow by its stem, too.)
4.	Sundial	Hour glass	Wall clock	(Hint: Device most commonly.)
5.	Bulb	Cell	Tube light	(Hint: It doesn't need electricity.)

Q. Is carbon assimilation associated with mitochondria?? If yes then how??