Define the following terms. (8 marks) (a) Electron affinity (b) Gay-lussac’s law of oxidation number (c) Molarity (d) Electrolysis (e) Reduction in terms of oxidation number (f) A catalyst (g) Chemical

. 2 B. 1 C.2/π D.1/π E.1/2 An arc PQ subtends an angle of 120° at the centre of a circle of radius 1 cm. The length of arc PQ is A. 120 cm B. 60 cm C. π/6cm D. 2π/3cm E.π^2/18 cm If the central angle of

Exercise 1.3 M = {x/x is an integer , and -3<x<6} , N = the set of positive integers that are less than 8. Find M∩N. (3 marks) A = {x/x is a positive integer that is divisible by 3}, B = {x/x is

a _____ quantity. (15) Velocity has both _____ and direction. (16) The rate of change of distance travelled is called _____ . (17) Uniform motion is motion with _____ velocity. (18) Any change in velocity

component is ……… . Key>>> 1.vector 2. force 3. zero 4.force 5. vector component 6.opposite 7.cector 8. scalar 9. same 10. opposite 11. magnitudes 12. vector displacement 14.vector 15. scalar 16.

(Answer ALL Questions) 1.Write TRUE or FALSE for each of the following statements. (7 marks) (a) A metallic bonding is observed in metals. (b) One molecule of hydrogen weigh 2g.(H=1) (c) Equavalent point

. A unit is a ……….. quantity. 2.standard Mass is a ……..quantity. 3.basic 4.Area is a ……….quantity. 4.derived 5.The British system is also called the ……. system. 5.FPS Length , mass and ……. called basic

the following statement True (or) False? (1) There are two types of motion. (2) Uniform motion is motion at constant speed. (3) Average velocity is a vector quantity. (4) Acceleration is a scalar quantity.

From the following equation, identify oxidizing and reducing agents .Give reason for your answer. 2H2O + 2Br2 → O2 + 4HBr (f) Which elements (s) N or P or K is not suitable for seed bearing and for leaf

speed 22.grater 23.velocity 24. acceleration 25.distance Are the following statement True (or) False? (1) There are two types of motion. (2) Uniform motion is motion at constant speed. (3) Average velocity

28.The distance between the origin and the point (-5,12) is A.5 B.12 C.7 D.13 E.17 △ABC has vertices A(0,7), B(5,-5) and C(10,7). The area of △ABC is A.50 B.60 C.80 D.120 E.140 30.△ABC is an isosceles

time 19. balance 20. 〖10〗^(-3) 21.smallest clock 23. 2 × 〖10〗^8 s 24. Mathematics 25. 3.17×〖10〗^7 26.〖10〗^41 27. 66 longer 29. 〖10〗^(-3) 30.natural ) The SI unit for pressure is …….. . (24) The total momentum

xviii)Deoxyribonucleic acid is normally a ………. molecule with capacity for self-replication . (xix) The selection done by man is called ………..selection. (xx) Animal in an ecosystems are……….. Answer ALL

20.If log_10⁡x<0 , then A. x<0 B.-1<x<0 C. -1<x<1 D. 0<x<1 E. x>1 If log_10⁡x=0.35, then log_10⁡√x=………. A. -1.75 B.-0.175 C. 0.175 D. 3.5 E. 0.7 Simplify (log⁡√x+log⁡〖x^(3/2)

9 B.10 C.11 D.12 E.13 Given that the class interval is 34-38. Which of the following is (are) true? The class limits of the interval are 34 and 38. The midpoint of the interval is 35. The lower class boundary

b^2 B.4a+2b C.8ab D. a^2 b^2 E. None of them 3+log_2⁡5=…….. A.log_2⁡40 B.log_2⁡4 C.log_2⁡150 D. log_2⁡15 E.log_2⁡60 log⁡0.01=……… A. 2 B. -2 C.1/2 D.-1/2 E.0 log_2⁡40+log_2⁡0.1+log_2⁡0.25=………. A. 0 B. 1

) Displacement has only magnitude. (15) Speed is a vector quantity. (16) Average velocity has only direction. (17) Acceleration is the rate of change of speed. (18) Average speed and average velocity have

The mean of five numbers is 10 and the mean of two of them is 13. The mean of the remaining three is A. 7 B.8 C. 12 D.23 E.24 There are seven numbers arranged in row, whose mean is 11. The mean numbers

.3/2 B.2/3 C.5/27 D.3/25 E. 5×27 10.If x=log_b⁡a,y=log_c⁡b,z=log_a⁡c, then xyz=………… A. 0 B. 1 C.-1 D. abc E. a+b+c If log⁡2=a, then =……. A.a^2 B.2.5a C.1+a D.1-a E.1/2 a 12.If log⁡2=a, log⁡3=b, then

A quadrilateral has as vertices the points M(a,b), N(c,d), Q(c+d,e), P(a+d,e). Find the slope of each side. C is the mid-point of AB, A if the point (-3,-2), and B is the point (2,8). What is the slope