(Important Questions) Important Question For CBSE Class X Science Board Examination 2009-10 (Set -7)

Magnetic effects of current

Q. 1. Name two important properties of a magnet.

Q. 2. What is the direction of magnetic field lines inside a magnet.

Q. 3. Draw magnetic field lines to depict uniform magnetic field

Q. 4. What type of magnetic field lines represent uniform magnetic field?

(Important Questions) Important Question For CBSE Class X Science Board Examination 2009-10 (Set -6)

Section A

Q. 1. Give the chemical formula of rust.

Q. 2. Plaster of Paris should be stored in a moisture-proof container. Explain why?

Q. 3. From which alcohol and acid ethyl ethanoate supposed to be  formed. Give molecular formula of each.

(Important Questions) Important Question For CBSE Class X Science Board Examination 2009-10 (Set -5)

Section A

Q. 1. What type of image is formed by a plane mirror?

Q. 2. What is the focal length of the plane mirror?

Q. 3. What type of lens does a drop of water behave like?

Q. 4. Name the essential part of human eye.

(Important Questions) Important Question For CBSE Class X Science Board Examination 2009-10 (Set -4)

Q. 1. What are magnetic field lines? How is the direction of magnetic field at a point determined? Mention two important properties of magnetic lines.

Q. 2. State the rule to determine the direction of a :

(Important Questions) Important Question For CBSE Class X Science Board Examination 2009-10 (Set -3)

Q. 1. A charge of 400 C flows through a conductor for 1.3 minutes and 20 seconds. Finds the magnitude of the current flowing through the conductor. [ 0.5 A]

Q. 2. A charge of 5000 C flows through an electric circuit in 2 hour and 30 minutes. Calculate the magnitude of the current flowing through the circuit. [0.555 A]

(Important Questions) Important Question For CBSE Class X Science Board Examination 2009-10 (Set -2)

Q. 61. Hydrogen gas combines with nitrogen.

(Important Questions) Important Question For CBSE Class X Science Board Examination 2009-10 (Set -1)

Q. 1. What is the basis of Mendeleev’s periodic law?

Q. 2. How many elements are there in a third period?

Q. 3. Sodium and potassium show similar reactivity towards water. What property do these elements possess in common?

Q. 4. Which of the elements F, Cl, Br, I is most reactive?

Q. 5. What are electropositive elements?

Important Questions For CBSE Class X Mathematics Board Examination 2009-10

Set - 11

Q. 1. Find the 10^th term of the AP : 2, 7, 12,………………………………………….

Q. 2. Find the 30^th term of the AP: 10, 7, 4,………………………………………….

Q. 3. Find the 11^th term of the AP: -3, -1/2, 2,………………………………………

Important Questions For CBSE Class X Mathematics Board Examination 2009-10

Set - 9

Application of Trigonometry

Important Questions For CBSE Class X Mathematics Board Examination 2009-10

Set - 9

Section - A

Arithmetic Progression ( nth term)

If general term is given :

Q. 1. Write the first three terms of the sequence whose nth term is:

Important Questions For CBSE Class X Mathematics Board Examination 2009-10

Set - 8

Q. 1.  Three cubes of metal whose edges are 3 cm, 4 cm and 5 cm are melted and formed into a single cube. Find its edge.

Q. 2.  The length of the minute hand of a clock is 14 cm. Find the area swept by the minute hand in 5 minutes.

Practice Assignment For CBSE Class X Mathematics Board Examination 2009-10

Practice Assignment No. 4

Q. 1. A bag contains 5 red, 8 green and 7 white balls. One ball is drawn at random from  the bag, find the probability of getting

Practice Assignment For CBSE Class X Mathematics Board Examination 2009-10

Practice Assignment No. 3

Q. 1. Prove that √2 is irrational.

Q. 2. Divide 2x⁴ + x³ -14x²-19x-6 by x² +3x +2 and verify the division logarithms.

Q. 3. For what value of k, the following pair of linear equations has infinite many solutions

Practice Assignment For CBSE Class X Mathematics Board Examination 2009-10

Practice Assignment No. 2

Q. 1. Find the sum of all natural no. between 100 and 200 which are divisible by 4.

Q. 2. The length of minute hand of clock is 14 cm. Find the area swept by minute hand in 5 minutes.

Practice Assignment For CBSE Class X Mathematics Board Examination 2009-10

Practice Assignment No. 1

Q. 1. Is it possible to design a rectangular park of perimeter 80 m and area 400 sq. m.?

Q. 2. Find a cubic polynomial with the sum, sum of product of its zeroes factor two at a time and the product of its zeros as 2, -7, -14 respectively.

Important Question For CBSE Class X Mathematics Board Examination 2009-10

Set - 7

Q. 1. For what value of k, the system of equations: 2x - ky + 3 = 0, 4x + 6y - 5 = 0 is consistent?

Q. 2. For what value of k, the quadratic equation 16x² – 9kx + 1 = 0 has real and equal roots.