12th Class Chemistry Mcqs With Answers Chapter 1| 2nd Year chemistry mcqs with answers pdf

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12 class chemistry mcqs 2021
12th Class Chemistry Mcqs With Answers Chapter 1 12th Class Chemistry Mcqs With Answers Chapter 2
12th Class Chemistry Mcqs With Answers Chapter 3 12th Class Chemistry Mcqs With Answers Chapter 4
12th Class Chemistry Mcqs With Answers Chapter 5 12th Class Chemistry Mcqs With Answers Chapter 6
12th Class Chemistry Mcqs With Answers Chapter 7 12th Class Chemistry Mcqs With Answers Chapter 8
12th Class Chemistry Mcqs With Answers Chapter 9 12th Class Chemistry Mcqs With Answers Chapter 10
12th Class Chemistry Mcqs With Answers Chapter 11 12th Class Chemistry Mcqs With Answers Chapter 12
12th Class Chemistry Mcqs With Answers Chapter 13 12th Class Chemistry Mcqs With Answers Chapter 14
12th Class Chemistry Mcqs With Answers Chapter 15 12th Class Chemistry Mcqs With Answers Chapter 16
12th Class Chemistry Mcqs With Answers Chapter 17 12th Class Chemistry Mcqs With Answers Chapter 18
12th Class Chemistry Mcqs With Answers Chapter 19 12th Class Chemistry Mcqs With Answers Chapter 20
12th Class Chemistry Mcqs With Answers Chapter 1


CHAPTER 1

Periodic Classification Of Elements & Periodicity

1. 7th period of the periodic table contains normal elements choose one among the following which is correct:

  1. 2
  2. 3
  3. 4
  4. 8

2. Periodic table has been divided into four blocks, which blocks contain highest elements choose one among the following which is correct:

  1. s
  2. P
  3. d
  4. f

3. The division of elements into blocks in the modern periodic table is based on choose one among the following which is correct:

  1. Shell
  2. Sub-shell
  3. Orbital
  4. All

4. Keeping in view the size of atoms, which order is the correct one choose one among the following which is correct:

  1. Mg > Sr
  2. Ba > Mg
  3. Lu > Ce
  4. CI>I

5. Mosley concluded by the X-ray studies of the elements that physical and chemical properties of elements depend upon choose one among the following which is correct:

  1. Atomic mass
  2. Atomic no.
  3. Mass no.
  4. All

6. Which one of the following is not ionic hydride choose one among the following which is correct:

  1. CsH
  2. LiH
  3. HCI
  4. NaH

7. The element with highest first ionization energy is choose one among the following which is correct:

  1. B
  2. C
  3. 0
  4. N

8. Mark the correct statement choose one among the following which is correct:

  1. Nat is smaller than Na
  2. Nat is larger than Na
  3. CI is smaller than CI
  4. Chion and Cl are equal

9. The element with atomic number 9 is closest in chemical properties with element of atomic-number choose one among the following which is correct:

  1. 27
  2. 11
  3. 17
  4. 8

10. Period six in periodic table contain which “block” elements choose one among the following which is correct:

  1. Sp
  2. s, p, d
  3. s, p, f
  4. s, p, d, f

11. Who introduced the zero group choose one among the following which is correct:

  1. Lother Mayer
  2. Mendeleev
  3. Ramsay
  4. Mosley

12. Elements of group II-B are called choose one among the following which is correct:

  1. Representative elements
  2. Transition elements
  3. Non-typical transition elements
  4. Coinage metal group

13. The elements with lowest M. Pt choose one among the following which is correct:

  1. Be
  2. Mg
  3. Cd
  4. Cr

14. Which of the following sets of atoms are arranged in order of decreasing electronegativity?

  1. N, O, F
  2. Si, P, S
  3. F,O, N
  4. S, Si, P

15. When hydrogen loses its electron to form Htion then it resemble choose one among the following which is correct:

  1. Transition metals
  2. Halogen
  3. Alkali metals
  4. Noble gases

16. Which of the halides show bridge type structure choose one among the following which is correct:

  1. NaCl
  2. AlCl3
  3. CCl4
  4. H2O

17. Which element of the following shows max. oxidation state choose one among the following which is correct:

  1. P
  2. S
  3. Mn
  4. Cr

18. M.Pt is highest for the elements of group choose one among the following which is correct:

  1. IA
  2. IIA
  3. IIIA
  4. IVA

19. Amphoteric oxide is formed by choose one among the following which is correct:

  1. Ca
  2. Fe
  3. Cu
  4. Zn

20. In the long form of the periodic table, the most electropositive elements occupy choose one among the following which is correct:

  1. Bottom right position
  2. Bottom left position
  3. Top right position
  4. Top left position

21. Keeping in view the size of atoms, which orders is the correct one choose one among the following which is correct:

  1. Mg > Sr
  2. Ba > Mg
  3. Lu> Ce
  4. CI>I

22. Mark the correct statement choose one among the following which is correct:

  1. Na is smaller than Na atom
  2. Nat is larger than Na atom
  3. CF is smaller than Cl atom
  4. CF (ion) and Cl (atom) are equal in size

23. Mark the correct statement choose one among the following which is correct:

  1. All lanthanides are present in the same group
  2. All halogens are present in the same period
  3. All the alkali metals are present in the same group
  4. All the noble gases are present in the same period

24. Which statement is incorrect choose one among the following which is correct:

  1. All the metals are good conductor of electricity
  2. All the metals are good conductor of heat
  3. All the metals form positive ions
  4. All the metals form acidic oxides

25. Which statement is correct choose one among the following which is correct:

  1. Hydrogen resembles in properties with IA, IVA and VIIA elements
  2. Hydrogen resembles in properties with IIIA, IVA and VA elements
  3. Hydrogen resembles in properties with IIA, IVA and VIA elements
  4. Hydrogen resembles in properties with IIA, IIIA and VIIA elements

26. Mark the correct statement choose one among the following which is correct:

  1. The ionization energy of calcium is lower than that of barium
  2. The ionization energy of calcium is lower than that of magnesium
  3. The ionization energy of calcium is higher than that of beryllium
  4. The ionization energy of calcium is lower than that of strontium

27. Mark the correct statement choose one among the following which is correct:

  1. Electron affinity is a measure of energy required to remove the electron
  2. Electron affinity is a measure of energy released by adding an electron
  3. Electron affinity is a measure of energy required to excite an electron
  4. Electron affinity is measure of energy released by removing an electron

28. Mark the correct statement choose one among the following which is correct:

  1. Metallic character increases down the group
  2. Metallic character increases from left to right along a period
  3. Metallic character remains the same from left to right along a period
  4. Metallic character remains the same down the group

29. Mark the correct statement choose one among the following which is correct:

  1. Melting points of halogens decrease down the group
  2. Melting points of halogens increase down the group
  3. Melting points of halogens remain the same throughout the group
  4. Melting points of halogens first increase and then decrease down he group

30. Mark the correct statement choose one among the following which is correct:

  1. Covalent character of metal halides increases from left to right in a period
  2. Boiling points of group IVA hydrides decrease down the group
  3. Ionic character of hydrides increases from left to right in a period
  4. The basicity of group IIA oxides decreases on descending the group

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