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SCF-CBSE-X- PERIODIC CLASSIFICATION OF ELEMENTS-BMT-02
COPYRIGHT 2013
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Time: 1Hr SCF-CBSE-X PERIODIC CLASSIFICATION OF ELEMENTS
Maximum Marks: 26
INSTRUCTIONS : 1. All the questions are compulsory. 2. The
question paper consists of 16 questions and are divided into 4
sections, A, B ,C and D. 3. Question numbers 1 to 6 are in section
A and are multiple choice questions. Where you need to select one
correct option out of the given four. 4. Question numbers 7 to 10
are in section B and are Very Short Answer Type Questions. 5.
Question numbers 11 to 14 are in section C and are Short Answer
Type Questions. 6. Question numbers 15 & 16 are in section D
and are Long Answer Type Questions. 7. Use of calculators are not
permitted.
SECTION-A
1. Zinc granules were added to zinc sulphate, copper sulphate,
aluminium sulphate and iron sulphate solutions as shown below. A
student would observe the depostion of metal on zinc in
beakers:
1) I and III 2) I and II 3) II and IV 4) III and IV. 2. A piece
of granulated Zn was dropped into CuSO4 solution. After sometime,
the colour of the
solution changed from: 1) Light green to blue 2) blue to
colourless
3) light green to colourless 4) light green to light blue 3. 10
mL of freshly prepared FeSO4 solution was taken in each of four
test tubes. Strips of Cu,
Zn, Al and Fe were introduced in different test tubes. Metal
deposition was obtained in two of them.
The right pair of metals forming the precipitates is: 1) Cu and
Zn 2) Al and Cu 3) Fe and Al 4) Zn and Al.
4. When Zinc plate dipped in ferrous sulphate solution is taken
out after 15 minutes its surface is coated with a:
1) Blue coating 2) Grey coating 3) Reddish coating 4) Black
coating.
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SCF-CBSE-X- PERIODIC CLASSIFICATION OF ELEMENTS-BMT-02
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5. A student took solutions of CuSO4,ZnSO4 and FeSO4 in four
test tubes and dropped pieces of zinc, copper and iron in each of
them separately as shown in the figure:
In which of the above shown test tubes, change in colour of the
solution would be observed? 1) I and II 2) II and III 3) II and IV
4) I and III 6. An iron nail is suspended in copper sulphate
solution and kept for a while. It is observed that the
solution: 1) Remains blue and a coating is formed on the nail 2)
Turns green and a coating is found on the nail 3) Remains blue and
no coating is formed on the nail 4) Turns green and no coating is
found on the nail.
SECTION-B
VERY SHORT ANSWER QUESTIONS (1mark) 7. What were the limitations
of Newlands Law of Octaves? 8. Name two elements of first period in
Modern periodic table. 9. An element has electronic configuration
2, 8, 6. Explain its position in the periodic table. 10. Nitrogen
(atomic number 7) and Phosphorus (atomic number 15) belong to group
15 of the periodic
table. Which of these will be more electronegative and why?
SECTION-C
SHORT ANSWER QUESTIONS (2marks) 11. The following table by the
letters A, B, C, D, E, F, G and H
Group 1 2 13 14 15 16 17 18 Element A B C D E F G H
(i) Which of the elements has the atomic size: (a) Biggest and
(b) Smallest?
(ii) Which element has valency: (a) 3 and (b) zero? 12. Consider
the part of periodic table given below and answer the following
questions
Group / Period
1 2 13 14 15 16 17 18
I a j II b e g h k III c f i l IV d
(i) The atom of which element is smaller in size e or h?
(ii) Which element is most electropositive in nature? (iii)
Which element has only one proton in its atom? (iv) How many
valence electrons does g have?
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SCF-CBSE-X- PERIODIC CLASSIFICATION OF ELEMENTS-BMT-02
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13. How does the tendency to gain electrons changes as we go
down the 16th group of periodic table? Why?
14. State Modern period law. How many groups and periods are
present in modern periodic table?
SECTION-D
LONG ANSWER QUESTIONS (4marks) 15. (a) Why did Mendeleev have
gaps in his periodic table? (b) State any three limitations of
Mendeleevs classification. (c) How does electronic configuration of
atoms change in a period with increase in atomic number? 16. An
element X (atomic number 17) reacts with an element Y (atomic
number 20) to form a
compound. (a) In which group and period of modern periodic table
the elements X and Y are present? (b) Classify X and Y as metal(s),
nonmetal(s) or metalloids(s) (c) What will be the formula of oxide
of element Y? Identify the nature of the bond between the two
elements in the oxide formed. (d) Draw the electron dot
structures of the cation and anion formed when X reacts with Y.
*****END OF TEST PAPER****