Given a parallelogram ABCD.Complete each statement along with the definition of property used.(i)AD=______ (ii)`/_DCB`=________ (iii)OC=_______ (iv)`/_DAB+/_CDA`=_______

Draw the graph of each of the following linear equations in two variables. (i) x + y = 4 (ii) x-y = 2 (iii) y = 3x (iv) 3 = 2x + y.

What is the van't Hoff factor of a completely ionised aqueous solution of (i) NaCl (ii) KCl (iii) MgSO_(4) (iv) K_(2)SO_(4) .

Write each of the following in the form of ax + by + c = 0 and find the values of a, b and c (i) x = -5 (ii) y = 2 (iii) 2x = 3 (iv) 5y = -3

Draw the graph of each of the following linear equations. (i) 2y = -x + 1 (ii) –x + y = 6 (iii) 3x + 5y = 15 (iv) x/2-y/3 =3

ABCD is a quadrilateral in which AD = BC and /_ DAB = /_ CBA Prove that (i) DeltaABD ~= DeltaBAC (ii) BD = AC (iii) /_ ABD = /_ BAC

What are hormone ? Mention one function each for (i) ACTH (ii) Melatonin (iii) Parathyroid hormone (iv) Thymosin.

Which two of the following salts are used for preparing iodized salt? (i)KIO 3 ​ (ii)KI (iii)I 2 ​ (iv)HI

Write each of the following in the form of ax + by + c = 0 and find the values of a, b and c (i) 2x = 5 (ii) y - 2 = 0 (iii) y/7=3 (iv) x= (-14)/13

In Fig. Altitudes AD and CE of Delta ABC intersect each other at the point P . Show that : (i) DeltaAEP~DeltaCDP (ii) DeltaABD~DeltaCBE (iii) DeltaAEP ~DeltaADB (iv) Delta PDC ~DeltaBEC

Identify the type of chemical reaction in the following statements and define each of them: (i) Digestion of food in our body (ii) Rusting of iron (iii) Heating of manganese dioxide with aluminium powder (iv) Blue colour of copper sulphate solution disappears when iron filings are added to it