Define the following for a spherical mirror : (i) principal axis, (ii) radius of curvature, (iii) principal focus, (iv) center of curvature, (v) aperture, (vi) pole.

Classify the following as scalar and vector quantities. (i) time period (ii) distance (iii) force (iv) velocity (v) work done

According to Bohr's theory mention the expressions of the following parameters for hydrogen atom: (i) radius of Bohr orbit, (ii) velocity of electron , (iii) orbital frequency of electron, (iv) angular momentum of electron, (v) kinetic energy of electron (iv) potential energy of electron.

Define and understand the following terms: (i) Phylum (ii) Class (iii) Family (iv) Order (v) Genus

Define (i) Natality, (ii) Mortality, (iii) Population density, (iv) Sex ratio, (v) Immigration.

(a) Draw a diagram of a mature embryo sac of an angiosperm and label the following parts in it : (i) Filiform apparatus (ii) Synergids (iii) Central cell (iv) Egg cell (v) Polar nuclei (vi) Antipodals (b) Write the fate of egg cell and polar nuclei after fertilization.

State which of the following are scalars and vectors- (i) density (ii) charge (iii) displacement (iv) energy (v) momentum (vi) volume (vii) time (viii) magnetic field intensity (ix) electric flux (x) force.

Write sturcutre of the following compounds : (i) Mesityl oxide , (ii) Pinacol (iii) Pinacolone , (iv) Acetaldol (v) Methyl vinyl ketone (vi) Phorone (vii) 3-Phenylprop-2-enal (viii) 1-Phenylpropan-1-one. (ix) 3-Methylbutanal (x) p-Nitropropiophenone. (xi) p-Methyl benzaldehyde.

Explain briefly the following term with suitable example :- (i) protonema (ii) antheridium (iii) archegonium (iv) diplontic (v) sporophyll (vi) isogamy

The image of a object placed 50cm in front of a concave mirror is formed 2 m behind the mirror. Determine its principal focus and radius of curvature.