Clasify the following into elements, compounds and mixtures. `(AS_(1))`
a. sodium b. soil c. sugar solution d. silver
e. calcium caronate f. tin g. silicon h. coal i. air
J. Methane k. carbon dioxide

By applying the knowledge of chemical classification, classify each of the following into elements, compounds or mixtures. (i) Sugar (ii) Sea water (iii) Distilled water (iv) Carbon dioxide (v) Copper wire (vi) Table salt (vii) Silver plate (viii) Naphthalene balls

By applying the knowledge of chemical classification, classify each of the following into elements, compounds or mixtures (i) Sugar (ii) Sea water (iii) Distilled water (iv) Carbon dioxide (v) Copper wire (vi) Table salt (vii) Silver plate (viii) Naphthalene balls

Write the chemical formula and name the elements present in the following compounds: a. Sodium chloride, b. Potassium hydroxide, c. Carbon dioxide, d. Calcium oxide, e. Sulphur dioxide.

Atom of seven elements A,B ,C, D, E,F and G have a different number of electronic shells but have the same number of electrons in their outermost shells. The element A and C combine with chlorine to form an acid and common salt respectively. The oxide of element A is liquid at room temperature and is a neutral substance while the oxides of the remaining six elements are basic in nature . Based on the above information, anwer the following question given ahead : Show the formation of the compound by a combination of element C with chlorine with the help of electronic structure .

Atom of seven elements A,B ,C, D, E,F and G have a different number of electronic shells but have the same number of electrons in their outermost shells. The element A and C combine with chlorine to form an acid and common salt respectively. The oxide of element A is liquid at room temperature and is a neutral substance while the oxides of the remaining six elements are basic in nature . Based on the above information, anwer the following question given ahead : Write the formula of the compound formed by the reaction of the element A with oxygen .

Find the dimensional formulae of the following quantities: a. the universal constant of gravitation G, b. the surface tension S, c. the thermal conductivity k and d. the coeficient of viscosity eta . Some equation involving these quantities are F=(Gm_1m_2)/r^2, S= (rho g r h)/2, Q=k(A(theta_2-theta_1)t)/d and F=- eta A (v_2-v_1)/(x_2-x_1) where the symbols have their usual meanings.

A rod of length 2 units whose one end is (1,0,-1) and other end touches the plane x-2y=2Z+4=0, then a. the rod sweeps the figure whose volume is b .pic . d. cubic units. e. the area of the region which the rod traces on the plane is f . g.2pih . i. j. the length of projection of the rod on the plane is k . l.sqrt(m .3n .)o.p . q. units. r. the centre of the region which the rod traces on the plane is s . t.(u . v. w.2/x .3y . z. , aa.2/b b .3c c . dd. ,-e e .5/f f .3g g . hh. ii.)dotj j . kk.

Consider the equation 10 z^2-3i z-k=0,w h e r ez is a following complex variable and i^2=-1. Which of the following statements ils true? (a) For real complex numbers k , both roots are purely imaginary. (b) For all complex numbers k , neither both roots is real. (c) For all purely imaginary numbers k , both roots are real and irrational. (d) For real negative numbers k , both roots are purely imaginary.