10th science Chapter 5th objective English medium

For chapter no. 4 click here 👇👇

Chapter - 4 carbon and its compounds

By vikas lodhi 

VENUS BHATNAGAR SCIENCE INSTITUTE INDORE 

                           CHAPTER - 5 

 (  PERIODIC CLASSIFICATION OF ELEMENTS ) 

Question 1.  Which of the following statements is correct about the trends when going down in a group of the periodic table?
(a) Elements become less electropositive in nature.
(b) Element oxides become more acidic.
(c) Valence electrons increases.
(d) Elements lose their electrons more easily.

Answer: (d) Elements lose their electrons more easily.

Question 2. Element A forms a chloride with the formula ACl3, which is a stable compound. A would most likely be the same group of the Periodic Table as –
(a) Na
(b) Mg
(c) Al
(d) Si

Answer: (c) Al

Question 3. Which of the following are coin metals?
(a) Ne, Ca, Na
(b) H2, N2, O2
(c) Li, Na, K
(d) Cu, Au, Ag

Answer: (d) Cu, Au, Ag

Question 4. Who gave the triad arrangement of elements?
(a) Mendeleev
(b) Newlands
(c) Dalton
(d) Dobereiner

Answer: (d) Dobereiner

Question 5. Newlands periodic table is based on the
(a) Atomic weight
(b) Atomic number
(c) Atomic radius
(d) Atomic volume

Answer: (a) Atomic weight

Question 6. Which of the following is not gas in normal atmospheric condition?
(a) Helium (He)
(b) Argon (Ar)
(c) Bromine (Br)
(d) Chlorine (Cl)

Answer:  (c) Bromine (Br)

Question 7. While moving left to right across a period, the atomic radii –
(a) Remains the same
(b) Approaches zero
(c) Decreases
(d) Increases first then decreases

Answer:  (c) Decreases

Question 8.  Which element is a metalloid?
(a) Carbon
(b) Nitrogen
(c) Oxygen
(d) Silicon

Answer:  (d) Silicon

Question 9. Moseley’s periodic table is based on
(a) Atomic mass
(b) Mass number
(c) Atomic number
(d) Atomic volume

Answer: (c) Atomic number

Question 10. Which of the following is a group of highly electronegative elements?
(a) Cl, Br, I
(b) S, Se, Te
(c) Na, K, Rb
(d) Ca, Sr, Ba

Answer: (a) Cl, Br, I

Question 11. Which of the following elements is a non-metal?
(a) Aluminium
(b) Chlorine
(c) Sodium
(d) Silicon

Answer: (b) Chlorine

Question 12. As we move down in a group in Modern Periodic Table, the size of elements generally
(a) increases
(b) decreases
(c) remain the same
(d) first, increase then decrease

Answer: (a) increases

Question 13. As we move from top to bottom in a group in Modern Periodic Table, the electronegativity of elements
(a) Increases
(b) Decreases
(c) No change
(d) Not certain

Answer:  (b) Decreases

Question 14. Which group of elements is considered most electropositive?
(a) Group 1
(b) Group 2
(c) Group 17
(d) Group 18

Answer: (a) Group 1

Question 15. Group 1 elements are also called as:
(a) Alkali metals
(b) Alkaline earth metals
(c) Halogens
(d) Noble gases

Answer:  (a) Alkali metals

Question 16.  Group 17 elements are also called as:
(a) Alkali Metals
(b) Alkaline Earth Metals
(c) Halogens
(d) Noble Gases

Answer: (c) Halogens

Question 17. How many elements were known when Mendeleev started his work?
(a) 100
(b) 215
(c) 65
(d) 80

Answer:  (c) 65

Question 18. Why Mendeleev left spaces in his Periodic Table?
(a) A mistake
(b) For future elements
(c) For Isotopes
(d) For Isobars

Answer:  (b) For future elements

Question 19. Why Lanthanoids and Actinoids are placed below in the Periodic Table?
(a) A mistake
(b) Better representation and view
(c) They were found very recently
(d) All of the above

Answer: (c) They were found very recently

Question 20.  A period may have elements with –
(a) Variable atomic sizes
(b) Variable atomic number
(c) Variable valency
(d) All of the above

Answer:  (d) All of the above

Question 21. Element A belongs to group 15. The formula of its hydride will:
(a) AH
(b) AH2
(c) AH3
(d) A3H

Answer: (c) AH3

Question 22. An electropositive element, A with 2 valence electron will form which type of oxide?
(a) AO
(b) A2O
(c) AO2
(d) AO3

Answer: (a) AO

Question 23. Most electronegative element in our Periodic Table:
(a) Iron
(b) Nitrogen
(c) Carbon
(d) Flourine

Answer: (d) Flourine

Question 24. Which of the following elements where not among metals/elements named to fill the gap of Mendeleev’s Periodic Tablespaces?
(a) Cobalt
(b) Scandium
(c) Gallium
(d) Germanium

Answer:  (a) Cobalt

Question 25.  In a group, all elements have similar ………..
(a) Electronic configuration
(b) Valence electron
(c) Electronegativity
(d) All of these

Answer: (b) Valence electron

Question 26. Which among the following is a noble gas?
(a) C
(b) N
(c) O
(d) Ne

Answer:  (d) Ne

Question 27. Which of the following elements has electronic configuration E = 2, 6?
(a) C
(b) N
(c) O
(d) Ne

Answer: (c) O

Question 28.  Which of the following elements is a metalloid?
(a) B
(b) Al
(c) S
(d) P

Answer: (a) B

Question 29. Which of the following is not a halogen?
(a) Br
(b) I
(c) Te
(d) At

Answer:   (c) Te

Question 30.  Which element has a total of two shells, with four valence electrons?
(a) C
(b) N
(c) Br
(d) Co

Answer: (a)

For chapter no. 6 click here 👇👇

Chapter 6 life process

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