Statement I : Functional group in picric acid is -COOH group
Statement II: In phenol- OH group is a ortho, para directing group and ring activating group
Statement II: In phenol- OH group is a ortho, para directing group and ring activating group
Anonymous Quiz
30%
Statement I and II are correct
20%
Statement I and II are Incorrect
22%
Statement –I is true, statement-II is false
29%
Statement –I is false, statement-II is true
👍7
Number of Pi bonds in phenyl benzoate are ‘X’. Number of lone pairs in phenyl benzoate are ‘Y’ .Correct relation is
Anonymous Quiz
34%
X+Y=11
38%
2X+Y=11
21%
X+2Y=11
7%
X-Y=11
The base-emitter junctions of a transistor is
Anonymous Quiz
23%
a wide depletion layer
49%
Low resistance
21%
a reverse bias
7%
None
👍6
Which of the following combination is incorrectly matched for test, reagent and result? (Single Correct Answer)
Anonymous Quiz
15%
1. Dumas Method- CuO- Estimation of C,N,X- giving N2, CO2 and water
15%
2. Carius Method- HNO3+ AgNO3- Estimation of C,H and halogen- CO2, water and white ppt of AgX
14%
3. Kjeldahl's method - Conc. H2SO4 then treated with NaOH- Estimation Of N- give ammonia gas
10%
4. Carius Method- Conc HNO3 then treated with BaCl2- Estimation of S- Give BaSO4
13%
5. Carius Method- Conc HNO3 then add ammonia & ammonium molybdate or Magnesia - Estimation of P -yel
10%
6. Estimation of O- passing over red hot coke, then pass through warm I2O5- give CO2 & I2
7%
7. Estimation of C and H- Combustion in presence of O2- Give CO2 and water
17%
None of these
👍1
If the mass of an object is halved while its radius is doubled, what happens to its gravitational potential energy?
Anonymous Quiz
15%
It becomes half
47%
It becomes one-fourth
26%
It remains the same
12%
It becomes four times
👍4
What is the orbital velocity of a satellite in a circular orbit around Earth, given that the radius of the orbit is (7 \times 10^6 m)? (Use (G = 6.67 \times 10^{-11} Nm^2/kg^2))
Anonymous Quiz
31%
7 km/s
42%
10 km/s
20%
5 km/s
7%
15 km/s
👍7
💈Tissues💈
Tissues are categorized as −
Plant Tissue
Animal Tissue
♦️Plant Tissue
Following are the major types of plant tissue −
➖Meristematic Tissues
➖Permanent Tissues
▪️Simple Permanent Tissues
➖Parenchyma
➖Collenchyma
➖Sclerenchyma
➖Epidermis
▪️Complex Permanent Tissue
➖Xylem
➖Phloem
▪️Meristematic Tissue
➖Meristematic tissue mainly consists of actively dividing cells, and helps in increasing the length and thickening the stems of the plant.
➖Meristematic tissue, commonly, present in the primary growth regions of a plant, for example, in the tips of stems or roots.
➖Depending on the region (where the meristematic tissues are found); meristematic tissues are classified as apical, lateral, and intercalary (see the image given below).
➖Apical meristem (as shown in the above image) is present at the growing tips of stems and roots and helps in their growth.
➖Lateral Meristem is found in stem or root region and helps in their growth.
➖Intercalary meristem is found at the base of the leaves or internodes (on twigs) and helps in growth.
🔸Permanent Tissue
Cells of meristematic tissue later differentiate to form different types of permanent tissue.
Permanent Tissue is further categorized as −
➖Simple Permanent Tissue and
➖Complex Permanent Tissue
🔸Simple Permanent Tissue
Simple Permanent Tissue further categorized as −
➖Parenchyma
➖Collenchyma
➖Sclerenchyma
➖Epidermis
🔸Parenchyma tissue provides support to plants and also stores food.
🔸Sometimes, parenchyma tissue contains chlorophyll and performs photosynthesis, in such a condition, it is known as collenchyma.
🔸The collenchyma tissue provides flexibility to plant and also provides mechanical support (to plant).
🔸The large air cavities, which are present in parenchyma of aquatic plants, give buoyancy to the plants and also help them float, are known as aerenchyma.
🔸The Sclerenchyma tissue makes the plant hard and stiff. For example, the husk of a coconut is made up of sclerenchymatous tissue.
🔸The cells of Sclerenchyma tissue normally are dead.
🔸The outermost layer of cells is known as epidermis.
🔸The epidermis is usually made up of a single layer of cells.
🔸The entire surface of a plant has the outer covering of epidermis, which protects all the parts of the plant.
🔷Complex Permanent Tissue
The complex tissue, normally, consists of more than one type of cells which work together as a unit.
Complex tissues help in the transportation by carrying organic material, water, and minerals up and down in the plants.
🔸Complex Permanent Tissue is categorized as;
➖Xylem
➖Phloem
🔸Xylem, normally, consists of tracheid, vessels, xylem parenchyma, and xylem fibers.
🔸Xylem is accountable for the conduction of water and mineral ions/salt.
🔸Phloem, normally, is made up of four types of elements namely −
➖Sieve tubes
➖Companion cells
➖Phloem fibers and
➖Phloem parenchyma
🔸Phloem tissue transports food from leaves to other parts of the plant.
Tissues are categorized as −
Plant Tissue
Animal Tissue
♦️Plant Tissue
Following are the major types of plant tissue −
➖Meristematic Tissues
➖Permanent Tissues
▪️Simple Permanent Tissues
➖Parenchyma
➖Collenchyma
➖Sclerenchyma
➖Epidermis
▪️Complex Permanent Tissue
➖Xylem
➖Phloem
▪️Meristematic Tissue
➖Meristematic tissue mainly consists of actively dividing cells, and helps in increasing the length and thickening the stems of the plant.
➖Meristematic tissue, commonly, present in the primary growth regions of a plant, for example, in the tips of stems or roots.
➖Depending on the region (where the meristematic tissues are found); meristematic tissues are classified as apical, lateral, and intercalary (see the image given below).
➖Apical meristem (as shown in the above image) is present at the growing tips of stems and roots and helps in their growth.
➖Lateral Meristem is found in stem or root region and helps in their growth.
➖Intercalary meristem is found at the base of the leaves or internodes (on twigs) and helps in growth.
🔸Permanent Tissue
Cells of meristematic tissue later differentiate to form different types of permanent tissue.
Permanent Tissue is further categorized as −
➖Simple Permanent Tissue and
➖Complex Permanent Tissue
🔸Simple Permanent Tissue
Simple Permanent Tissue further categorized as −
➖Parenchyma
➖Collenchyma
➖Sclerenchyma
➖Epidermis
🔸Parenchyma tissue provides support to plants and also stores food.
🔸Sometimes, parenchyma tissue contains chlorophyll and performs photosynthesis, in such a condition, it is known as collenchyma.
🔸The collenchyma tissue provides flexibility to plant and also provides mechanical support (to plant).
🔸The large air cavities, which are present in parenchyma of aquatic plants, give buoyancy to the plants and also help them float, are known as aerenchyma.
🔸The Sclerenchyma tissue makes the plant hard and stiff. For example, the husk of a coconut is made up of sclerenchymatous tissue.
🔸The cells of Sclerenchyma tissue normally are dead.
🔸The outermost layer of cells is known as epidermis.
🔸The epidermis is usually made up of a single layer of cells.
🔸The entire surface of a plant has the outer covering of epidermis, which protects all the parts of the plant.
🔷Complex Permanent Tissue
The complex tissue, normally, consists of more than one type of cells which work together as a unit.
Complex tissues help in the transportation by carrying organic material, water, and minerals up and down in the plants.
🔸Complex Permanent Tissue is categorized as;
➖Xylem
➖Phloem
🔸Xylem, normally, consists of tracheid, vessels, xylem parenchyma, and xylem fibers.
🔸Xylem is accountable for the conduction of water and mineral ions/salt.
🔸Phloem, normally, is made up of four types of elements namely −
➖Sieve tubes
➖Companion cells
➖Phloem fibers and
➖Phloem parenchyma
🔸Phloem tissue transports food from leaves to other parts of the plant.
👍10❤4🤩1