By process of sublimation

Separate the sublimating substance (Naphthalene / Anthracene / Camphor / Ammonium chloride) from the mixture through the process of sublimation.To start sublimation, click on the 'Start Sublimation' button.To heat the mixture in the china dish, drag the china dish over the Bunsen burner.

 Hence to separate a volatile compound (sublimate) from a non-volatile compound (non-sublimate), the sublimation process is used.

In a China dish the mixture is kept, and is placed on a stand. An inverted funnel is kept over the mixture in China dish with plugged stem. The sublimate on heating gets collected on the funnel and common salt remains in the China dish.

ANSWER
Water is a compound and a compound forms whenever two or more atoms atoms form chemical bonds with each other. The chemical formula for water is H 2 O which means each molecule of water consists of one oxygen atom chemically bonded to two hydrogen atoms.

Hybridisation is defined as the process of interbreeding between two genetically divergent individuals or two individuals of different species. Therefore, the statement (i) is correct.
Interspecific hybridisation means cross mating between two different species but sharing same genera. For example, a cross breed between a lion and a tiger, they both are from same genus Panthera but different species. So the statement that cross between two varieties is called interspecific hybridisation is wrong.
I am a brinjal farmer, my brinjals are being infected by some beetles every year. I spend a huge sum of money on insecticides and pesticides to protect my crop. Then, a biotechnology company approaches me with a new strain or variety of brinjal plants which have the capability to produce a natural pesticide that makes it resistant to the beetles. My crop is not only saved, but  I also get good yield of brinjals now and earn a lot of money. I do not have to spend extra money on pesticides and insecticides. Basically, I got a brinjal plant with gene of desired character and got a desired genetically modified brinjal plants. Therefore, the statement (iii) is correct.
When the parent plants cross bred are from the same species, but of different variety is called intervarietal hybridisation. For example, a cross bred between two different varieties of wheat plant. They belong to the same species but they are of different variety. Therefore, the statement (iv) is wrong.
Hence, we can conclude that (i) and (iii) are correct statements.
 

Hybridisation is defined as the process of interbreeding between two genetically divergent individuals or two individuals of different species. Therefore, the statement (i) is correct.
Interspecific hybridisation means cross mating between two different species but sharing same genera. For example, a cross breed between a lion and a tiger, they both are from same genus Panthera but different species. So the statement that cross between two varieties is called interspecific hybridisation is wrong.
I am a brinjal farmer, my brinjals are being infected by some beetles every year. I spend a huge sum of money on insecticides and pesticides to protect my crop. Then, a biotechnology company approaches me with a new strain or variety of brinjal plants which have the capability to produce a natural pesticide that makes it resistant to the beetles. My crop is not only saved, but  I also get good yield of brinjals now and earn a lot of money. I do not have to spend extra money on pesticides and insecticides. Basically, I got a brinjal plant with gene of desired character and got a desired genetically modified brinjal plants. Therefore, the statement (iii) is correct.
When the parent plants cross bred are from the same species, but of different variety is called intervarietal hybridisation. For example, a cross bred between two different varieties of wheat plant. They belong to the same species but they are of different variety. Therefore, the statement (iv) is wrong.
Hence, we can conclude that (i) and (iii) are correct statements.
 

Sunflower

1. Which one is an oil yielding plant among the following ?

(a) Lentil

(b) Sunflower

(c) Cauliflower

(d) Hibiscus

Soln: (b) Sunflower

Explanation:

Lentils are pulse yielding plants. Cauliflower is a vegetable and Hibiscus is a flower, whereas Sunflower is used to make oil.

Sunflower

Option.. a ..

Fill in the following blank with suitable word :

If the weight of a body is 6 N on the moon, it will be about……………………… on the earth.

SOLUTION

 If the weight of a body is 6 N on the moon, it will be about 36N on the earth.

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Theory In colloidal solution the size of particles are smaller than 10-5 cm or smaller generally ( 10-5 or 16-7 ) it is a heterogeneous in a nature and particles of one substance depressed through another substance

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The Golgi apparatus, also known as the Golgi complex, Golgi body, or simply the Golgi, is an organelle found in most eukaryotic cells. Part of the endomembrane system in the cytoplasm, it packages proteins into membrane-bound vesicles inside the cell before the vesicles are sent to their destination

Golgi complex is also known for golgi apparatus it mainly manufactured proteins .it is the crucial organelle of the cytoplasmic body .Its function includes modification, packing and storage of products in vesicles.

Sclerenchyma cells

Sclerenchyma cells are the permanent tissues present in the plants. They provide hardness and stiffness to the plant and are composed of dead cells. This tissue is present in stems around vascular bundles in the veins of leaves and in hard covering of seeds and nuts. e.g., the husk of coconut is made up of sclerenchymatous tissues. The cells of Sclerenchyma are long narrow and thickened due to lignin.

 

1s²2s²2p⁶3s²

Sunflower

(B) sunflower.

(b) sunflower

Sunflower

Which one is an oil yielding plant among the following ?

(a) Lentil

(b) Sunflower

(c) Cauliflower

(d) Hibiscus

Soln: (b) Sunflower

Explanation:

Lentils are pulse yielding plants. Cauliflower is a vegetable and Hibiscus is a flower, whereas Sunflower is used to make oil.

(C)least on equator and more on poles

36Newton

As an example, consider sodium chloride, NaCl, the chemical name for common table salt. Sodium chloride is an ionic compound composed of sodium cations, Na+, and chloride anions, Cl−, combined in a 1:1 ratio. The formula mass for this compound is computed as 58.44 amu 


Aluminum sulfate, Al2(SO4)3,The formula for this compound indicates it contains Al3+ and SO42−ions combined in a 2:3 ratio. For purposes of computing a formula mass, it is helpful to rewrite the formula in the simpler format, Al2S3O12. 

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 The rules for writing of distribution of electrons in various shells for the first eighteen elements are:

         (i) The maximum number of electrons present in a shell is formula—2n²

              n = orbit number i.e., 1, 2, 3

              Maximum number of electrons in different shells are:

              K shell n = 1 2n² ⇒ 2(1)² = 2

              L shell n = 2 2n² ⇒ 2(2)² = 8

              M shell n = 3 2n² ⇒ 2(3)² = 18

              N shell n = 4 2n² ⇒ 2(4)² = 32

         (ii) The maximum number of electrons that can be accommodated in the outermost orbit is 8.

         (iii) Electrons are not accommodated in a given shell unless the inner shells are filled. (Shells are filled step-wise).

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Plant Cell	Animal Cell
1. They are larger in size.	1. They are smaller in size.
2. Cell wall is present.	2. Cell wall is absent.
3. Lysosomes are absent or very few in number	3. Lysosomes are larger in number.
4. Plastids are present.	4. Plastids are absent.
5. Subunits of Golgi bodies known as dictyosomes are present.	5. Prominent Golgi bodies are present.
6. Vacuoles are larger in size.	6. Vacuoles are smaller in size.

According to Newton's third law of motion - “To every action, there is always an equal and opposite reaction. ... Thus, action and reaction forces act on different bodies, not on the same body so the correct option is B.

✳Stratified squamous ✳Columnar ✳ Cuboidal

Epithelial tissues are identified by both the number of layers and the shape of the cells in the upper layers. There are eight basic types of epithelium: six of them are identified based on both the number of cells and their shape; two of them are named by the type of cell (squamous) found in them.

SIMPLE

• The cells are extremely thin and flat and form a delicate lining.
• The lining of oesophagus and the mouth are covered with squamous epithelium.

STRATIFIED

• The cells are arranged in many layers to prevent wear and tear.
• Since they are arranged in a pattern of layers, the epithelium is called stratified squamous
• The skin, which protects the body, is made of squamous epithelium.

COLUMNAR

• The columnar (meaning ‘pillar-like’) epithelium facilitates movement across the epithelial barrier.
• It is present where absorption and secretion occur, as in the inner lining of the intestine, tall epithelial cells are present.
• In the respiratory tract, the columnar epithelial tissue also has cilia, which are hair-like projections on the outer surfaces of epithelial cells.
• These cilia can move, and their movement pushes the mucus forward to clear it. This type of epithelium is thus ciliated columnar epithelium.

CUBOIDAL

• Cuboidal epithelium (with cube-shaped cells) forms the lining of kidney tubules and ducts of salivary glands, where it provides mechanical support.
• Epithelial cells often acquire additional specialisation as gland cells, which can secrete substances at the epithelial surface.
• Sometimes a portion of the epithelial tissue folds inward and a multicellular gland is formed.

In which subject

Q.5

1826

1805 year

Year 1826

In 1826 by John Walker

In year of 1805 K. Chancel, an assistant to a professor Louis Jacques Thenard, Paris invented the modern matchstick. In his invention, the head of the match was coated with potassium chlorate, sugar, sulfur and rubber.

Red phosphorus

It contain red phosphorus

In year of 1805 K. Chancel, an assistant to a professor Louis Jacques Thenard, Paris invented the modern matchstick. In his invention, the head of the match was coated with potassium chlorate, sugar, sulfur and

A kind of red phosphorus is present in matchsticks

The striking surface of the matchbox contains red phosphorus and the head of the matchstick  contains potassium chlorate. So when the matchstick is rubbed on the matchbox, some of the red phosphorus is converted to white phosphorus, a chemical i.e. so volatile that it ignites in air.

The distribution of electrons in different orbits or shells is governed by a scheme known as Bohr bury scheme.The arrangement of electrons in various energy levels of an atom is known as the electronic configuration of the atom. According to this scheme. The electrons are arranged around the nucleus in different energy levels or energy shells. The electrons first occupy the shell with the lowest energy i.e., closest to the nucleus. The first or the innermost energy shell (K or n = 1) can take only two electrons. The second shell (L or n = 2) can contain upto 8 electrons. From third shell (M or n = 3) onwards, the shells become bigger. The third shell can accommodate as many as 18 electrons. In general, the maximum number of electrons that can be present in any shell is 2n2 where n is the number of energy shell. Thus, the first orbit (n = 1, known as K shell) can contain 2 × 12 = 2 electrons, the second orbit (n = 2, known as L shell) can contain 2 × 22 = 8 electrons.

The distribution of electrons in different orbits or shells is governed by a scheme known as Bohr bury scheme.The arrangement of electrons in various energy levels of an atom is known as the electronic configuration of the atom. According to this scheme.

1. The electrons are arranged around the nucleus in different energy levels or energy shells. The electrons first occupy the shell with the lowest energy i.e., closest to the nucleus.
2. The first or the innermost energy shell (K or n = 1) can take only two electrons.
3. The second shell (L or n = 2) can contain upto 8 electrons.
4. From third shell (M or n = 3) onwards, the shells become bigger. The third shell can accommodate as many as 18 electrons. In general, the maximum number of electrons that can be present in any shell is 2n² where n is the number of energy shell. Thus, the first orbit (n = 1, known as K shell) can contain 2 × 1² = 2 electrons, the second orbit (n = 2, known as L shell) can contain 2 × 2² = 8 electrons.

The distribution of electrons in different orbits or shells is governed by a scheme known as Bohr bury scheme.The arrangement of electrons in various energy levels of an atom is known as the electronic configuration of the atom. According to this scheme.

1. The electrons are arranged around the nucleus in different energy levels or energy shells. The electrons first occupy the shell with the lowest energy i.e., closest to the nucleus.
2. The first or the innermost energy shell (K or n = 1) can take only two electrons.
3. The second shell (L or n = 2) can contain upto 8 electrons.
4. From third shell (M or n = 3) onwards, the shells become bigger. The third shell can accommodate as many as 18 electrons. In general, the maximum number of electrons that can be present in any shell is 2n² where n is the number of energy shell. Thus, the first orbit (n = 1, known as K shell) can contain 2 × 1² = 2 electrons, the second orbit (n = 2, known as L shell) can contain 2 × 2² = 8 electrons.

Valency no. 0

For oxide : XO For chloride :XCl2 For hydroxide : X(OH)2