Question

JHT/X/XVII ACTIVITY SHEET ( TEST PAPER ) Date :- ……/….../2020

CLASS – 10 th Chapters :- 1 & 2

Time : 1Hr. 15 min. SUBJECT : SCIENCE & TECHNOLOGY SECTION –A Max. Marks: 25



Q.1.(A) Answer the following -

1. Rewrite the following statement with suitable words in the blanks : - (01)

In a period , atomic size generally ………………… from left to right.

2. Match the pairs : - (02)

(1) Gravitational constant - ………………… (a) N

(b) Nm2

/ kg2



(2) Weight - ………………… (c) kg

(d) m/s2



3. Complete the analogy :- (01)

Group – 1 & 2 : s - block : : Group – 3 to 12 : …………………

4. Name the following :- (01)

The family name of the group – 17 elements.

Q.1.(B) Choose the correct alternatives - (03)

1.The escape velocity of an object from the earth’s surface Vesc = ……………



2. Formula of an oxide of metal M is M2O, metal M is belongs to group ………………

a) Group – 1 b) Group – 2 c) Group – 17 d) Group – 13

3. The value of g on the surface of the moon is ………… of the value of g on the earth surface.

a) 1/7 th b) 1/5 th c) 1/8 th d) 1/6th



Q.2. Answer the following questions : ( Any- Three ) (06)

1) State the Dobereiner’s law of triad. Write suitable example.

2) Distinguish between – ‘g’ and ‘G’.

3) Elements in the same group show similar chemical properties – Give reason.

4) Will the value of g be the same everywhere on the surface of the earth?

What will be the value of g at the centre of the earth?

Q. 3.Answer the following questions – ( Any – Two ) (06)

1) Differentiate between groups and periods.

2) Write merits of Mendeleeve’s periodic table.

3) State & explain the Newton’s law of gravitation.

Q. 4. Answer the following questions – ( Any – One ) (05)

(1) Identify the type of elements as Inert gas element , Second group elements , Seventeen group

elements, Third row elements & Transition elements and also write their blocks as s-block , p-

block , d- block from their electronic configuration given below .

You can use the table given below to answer.

a) ( 2, 8, 2 ) , b) ( 2, 8, 1 ) , c) ( 2, 8, 8 ) , d) ( 2, 7 ) ,

e) ( 2, 8, 7) , f) (2, 8 ) , g) ( 2, 2 ) , h) ( 2, 8, 10 , 2 )

Sr. No. Type of element Electronic configuration Name of the block

1. …………………………….. - element ………………………… ………… - block

2. ……………………………. …………………………. ………………………….

(2) Write the three laws given by Kepler. How did they help Newton to

arrive at the inverse square law of gravity?​

Answer 1

Answer:

CBSE Class 10 sample papers have been released by the board to make students aware of the new pattern according to which question papers will be prepared for the Board Exam 2020. Board has also published the marking schemes of all sample question papers which explains the step-wise marking that will be followed while evaluating answer sheets of board exams. Marking scheme also includes the key concepts and suggested answers of all questions given in the CBSE sample paper.

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Explanation: