Classify the following as open, closed or isolated system. (i) Animals and plants on the earth. (ii) Calorimeter. (iii) Thermos flask filled with hot tea. (iv) A tin containing Pepsi.

Classify the following as eleemnt and compound. (i) mercuric oxide (ii) helium gas (iii) water (iv) table salt (v) iodine (vi) mercury (vii) oxygen (viii) nitrogen

Classify the following polynominals as linear and quadratic: (i) 5x+9 (ii) x^2+3x-5 (iii) 3x-7 (iv) 3x^2-5x (v) 5x^2

Draw the structures of the following compounds the carbonyl C are same and classify them on the basis of C-O single bond and C = O double bond present in them: (i) Ethyl alcohol (ii) acetaldehyde (iii) o-nitrophenol (iv) Diethyl ether (v) isopropyl alcohol (vi) acetone.

Classify the following algebraic expression as monomials, binomials, trinomials, and polynomial : (i) 7x (ii) 5y-7z (iii) 3x^3 - 5x^2 - 11 (iv) 1- 8a - 7a^2 - 7a^3 (v) 5m - 3 (vi) a (vii) 4 (viii) 3y^2 - 7y + 5

Diseases in humans can be prevented by administration of vaccines. Vaccines contain inactivated, killed / weakened pathogens that can be used as antigens to provide either permanent or temporary immunity against a specific pathogen or disease. Conventional methods of vaccine preparation include the use of completely or partially killed pathogens. These vaccines however posed a risk of causing disease in case of some persons. Biotechnological techniques provide alternative antigenic genes isolated in the laboratory that can be used to make pure forms of proteins that can be used as antigens to activate the immune system. Recent developments in this field include production of edible vaccines like transgenic potatoes. Consumption of raw potatoes is speculated to develop immunity against the pathogen. These edible vaccines are produced by inserting genes isolated from specific pathogens to produce the antigen in the plants. Based on the given paragraph answer the following questions. i) How can people immunized with vaccines containing semi-killed pathogens have a risk of contracting a disease?

Observe the following diagram and answer the questions . i. The schematic of which power plant is shown in diagram? ii.What is the function of the combustion chamber in the plant? iii. What is the function of the compressor in the plant ? iv. Draw the flow chart showing the generation of electricity in the power plant. v. Draw the flow chart for the transformation of energy in the power plant.

Consider a liquid at rest in a container which opens into atmosphere. At any point A at a depth h below the surface of the liquid, (i) the gauge pressure at point A is rho gh. (ii) the gauge pressure at point a is P _(a)+rhogh. (iii) The pressure at point A is rhogh. (iv) The pressure at point A is Pa + rho gh. The correct alternative is

True or False If false, write the correct sentence Each of the following statements is wrong. Rewrite them correctly by changing either one or two words. i. Simple squamous epithelium is present in respiratory tract. ii. Glandular epithelium is present in kidneys. iii Chlorenchyma helps the plant to float in water. iv. Striated muscles are also called involuntary muscles

The transverse section of a plant shows following anatomical features :(i) Large number of scattered vascular bundles surrounded by bundle sheath. (ii) Large conspicuous parenchymatous ground tissue. (iii)Vascular bundles conjoint and closed.