Geography 9th class MCQ's 1st chapter

                                                                   Multiple Choice Questions

Q1.India has total geographical area of million square km.

a) 3.28                                                                               b) 2.22

c) 4.55                                                                               d) 3.50

Ans. (a)

Q2.Which line of latitude divides India into two halves?

a) Equator                                                                         b) Tropic of Cancer

c) Arctic circle                                                                   d) Tropic of Capricorn

Ans. (b)

Q3.The southernmost latitude of India is:

a) 5˚4’N                                                                              b) 6˚4’N

c) 8˚4’N                                                                              d) 10˚5’N

Ans. (c)

Q4.The North to South distance of India is:

a) 2,933 km                                                                        b) 3,214 km

c) 2,944 km                                                                        d) 3,512 km

Ans. (b)

Q5.Which is the largest state in terms of area?

a) Maharashtra                                                                 b) Uttar Pradesh

c) Rajasthan                                                                      d) Madhya Pradesh

Ans. (c)

Q6.The capital of Sikkim is:

a) Dispur                                                                            b) Shillong

c) Kohima                                                                          d) Gangtok

Ans. (d)

Q7.Andaman and Nicobar Island is located in:

 a) Bay of Bengal                                                                b) Arabian sea

 c) Indian ocean                                                                  e) Gulf of cambay

Ans. (b)

Q8.Which is the captial of  Madhya Pradesh ?

 a) Lucknow                                                                       b) Jhansi

 c) Bhopal                                                                           d) Jammu

Ans. (c)

Q9.Where does standard meridian of India pass through ?

 a) Srinagar                                                                         b) Allahabad

 c) Kolkata                                                                         d) Mirzapur

Ans.(d)

Q10.India has coastline of ...........

  a) 6,500 km                               b) 7,500 km                           c)8,878                     d)9,766

Ans.(b)

Q11.Which is the smallest state of India ?

  a) Arunachal Pradesh                 b) Jammu and Kashmr           c) Sikkim             d) Goa

Ans. (d)

Q12. As one moves from south to north, the duration of the day and night is influenced by :

  a) Longitudinal extent                                                           b) Latitudinal extent

  c) all of these                                                                       d) None of these

Ans. (b)

                                 

   

Polynomials 9th class maths CBSE

                                           Exercise 2.1

Q1.Which of the following expressions are polynomials in one variable and which are not ? State reasons for your answers.

a)4x² - 3x + 7

Sol)Yes it is a polynomial in one  variable because the power of the variable is a whole number.

b)y² + /2

Sol)Yes it is a polynomial in one variable because the power of the variable is a whole number.

c)3 /t + t /2

Sol)3 x 1/2 x t x 1/2 x 2

      3 x 1t/2 + T

      No it is not a polynomial because the power of the variable is in fraction

d) y + 2/y 

Sol) y + 2y-² 

      No it is not a polynomial because the power of the variable is a negative integer

Geography CBSE-NCERT 9th class 1st Lesson India size and location

                                     India Size and Location

Q1.The sun rises two hours earlier in Arunachal Pradesh as compared to Gujrat in the west but the watches show the same time.How does this happen ?

Ans.India's longitudinal extent of east-west extent covers a distance of about 3,000 km. So from Arunachal Pradesh to Gujrat there is a time lag of two hours. Hence time along the standard Meridian of India (82 degree 30 minutes east) passing through Mirzapur (in Uttar Pradesh ) is taken as the standard time for the whole country to avoid the mess created by different regional times. This time is accepted for the whole country.That is why the watches show the same time.

Q2.Which Island countries are our southern neighbours ?

Ans.Srilanka And Maldives.

Q3.Name the group of islands lying in the Arabian sea ?

Ans.Lakshadeep,Pondicherr and Diu and Daman.

Q4.Name the countries which are larger than India ?

       Country : Area in sq.km

Ans.Russia : 1,70,75,200

       Canada : 9,97,84,670

       China : 95,96,960

       USA : 96,31,418

       Brazil : 85,11,965

       Australlia : 76,86,850

 

Science Chapter 1: Motion Question Answers

                                              Motion 

                                      NCERT Questions

Q1.An object has moved through a distance.Can it have zero displacement? If yes, support your answer 

      with an example.

Ans.Yes,an object can have zero displacement even when it has moved through a distance.This happens when final position of the object coincides with its initial position.For example,in going from home to school and coming back to home,some distance is travelled but displacement is zero.

Q2.A farmer moves along the boundary of a square field of side 10 m in 40 s.What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds?

Ans.In fig. 1, ABCD is a square field of side 10 m.

       Time for one round = 40 seconds,

       Total time = 2 Minutes 20 seconds = (2 x 60 + 20)s = 140 s

       Number of rounds completed =140/40 = 3.5

       If farmer starts from A, he will complete 3 rounds (A==>B==>C==>D==>A) at A. In the last 0.5 

       round starting from A, he will finish at C.

                                  =>                                                              

       Displacement = AC , Where AC = root of AB^2 + BC^2
                                                        = root of 10^2 + 10^2= 10 root of 2m


Q3.Which of the following is true for displacement?
(a) It cannot be zero
(b)Its magnititude is greater than the distance travelled by the object.
Ans.Displacemment can be zero.The statement is not true.
(b).Magnitude of displacement is never greater than the distance travelled by the object.The statement is
     not true.

Q4.Distinguish between speed and velocity.
Ans.Velocity:
       It is speed in a particular direction

       Velocity = Displacement  ÷ Time

       Speed:

       It is a distance travelled by an object per unit time

       Speed = Distance ÷ Time

Q5.Under what conditions is the magnititude of average velocity of an object equal to average speed?

Ans.When a body moves along a straight line, the magnitude of average velocity of an object is equal to its average speed.

Q6.What does the odometer of an automobile measure?

Ans.The odometer of an mobile measures the distance travelled by the vehicle.

Q7.What does the path of an object look like when it is uniform motion ?

Ans.In uniform motion,the path of an object can be straight line, curved line,zig-zag line, or even a circle.It can have any shape.This is because in uniform motion, speed is constant. The direction of motion may change.

Q8.When will you say a body is in (i) uniform acceleration ? (ii) non uniform acceleration ?

Ans.(i) A body is said to be in uniform acceleration, when velocity of the body changes by equal amounts in equal intervals of time. For example, motion a a body falling freely under gravity.

(ii) A body is said to be in non acceleration, when velocity of the body changes by unequal amounts in equal interval of time. For example, motion of a car on highway through city limits.

Q9.What is the nature of the distance time graphs for uniform and non uniform motion of an object ?

Ans.When the motion is uniform,the distance time graph is a straight line with some slope.

        When the motion is non uniform, the distance time graph is not a straight line.It can be any curve.

Q10.What can you say about the motion of an object whose distance time graph is a straight line parallel to the time axis ?

Ans.When distance time graph of an object is a straight line parallel to the time axis, distance of the object at every instant of time is the same. there the object must be stationery.