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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 |
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:
- 2
- 3
- 4
- 8
2. Periodic table has been divided into four blocks, which blocks contain highest elements choose one among the following which is correct:
- s
- P
- d
- f
3. The division of elements into blocks in the modern periodic table is based on choose one among the following which is correct:
- Shell
- Sub-shell
- Orbital
- All
4. Keeping in view the size of atoms, which order is the correct one choose one among the following which is correct:
- Mg > Sr
- Ba > Mg
- Lu > Ce
- 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:
- Atomic mass
- Atomic no.
- Mass no.
- All
6. Which one of the following is not ionic hydride choose one among the following which is correct:
- CsH
- LiH
- HCI
- NaH
7. The element with highest first ionization energy is choose one among the following which is correct:
- B
- C
- 0
- N
8. Mark the correct statement choose one among the following which is correct:
- Nat is smaller than Na
- Nat is larger than Na
- CI is smaller than CI
- 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:
- 27
- 11
- 17
- 8
10. Period six in periodic table contain which “block” elements choose one among the following which is correct:
- Sp
- s, p, d
- s, p, f
- s, p, d, f
11. Who introduced the zero group choose one among the following which is correct:
- Lother Mayer
- Mendeleev
- Ramsay
- Mosley
12. Elements of group II-B are called choose one among the following which is correct:
- Representative elements
- Transition elements
- Non-typical transition elements
- Coinage metal group
13. The elements with lowest M. Pt choose one among the following which is correct:
- Be
- Mg
- Cd
- Cr
14. Which of the following sets of atoms are arranged in order of decreasing electronegativity?
- N, O, F
- Si, P, S
- F,O, N
- S, Si, P
15. When hydrogen loses its electron to form Htion then it resemble choose one among the following which is correct:
- Transition metals
- Halogen
- Alkali metals
- Noble gases
16. Which of the halides show bridge type structure choose one among the following which is correct:
- NaCl
- AlCl3
- CCl4
- H2O
17. Which element of the following shows max. oxidation state choose one among the following which is correct:
- P
- S
- Mn
- Cr
18. M.Pt is highest for the elements of group choose one among the following which is correct:
- IA
- IIA
- IIIA
- IVA
19. Amphoteric oxide is formed by choose one among the following which is correct:
- Ca
- Fe
- Cu
- Zn
20. In the long form of the periodic table, the most electropositive elements occupy choose one among the following which is correct:
- Bottom right position
- Bottom left position
- Top right position
- 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:
- Mg > Sr
- Ba > Mg
- Lu> Ce
- CI>I
22. Mark the correct statement choose one among the following which is correct:
- Na is smaller than Na atom
- Nat is larger than Na atom
- CF is smaller than Cl atom
- CF (ion) and Cl (atom) are equal in size
23. Mark the correct statement choose one among the following which is correct:
- All lanthanides are present in the same group
- All halogens are present in the same period
- All the alkali metals are present in the same group
- All the noble gases are present in the same period
24. Which statement is incorrect choose one among the following which is correct:
- All the metals are good conductor of electricity
- All the metals are good conductor of heat
- All the metals form positive ions
- All the metals form acidic oxides
25. Which statement is correct choose one among the following which is correct:
- Hydrogen resembles in properties with IA, IVA and VIIA elements
- Hydrogen resembles in properties with IIIA, IVA and VA elements
- Hydrogen resembles in properties with IIA, IVA and VIA elements
- Hydrogen resembles in properties with IIA, IIIA and VIIA elements
26. Mark the correct statement choose one among the following which is correct:
- The ionization energy of calcium is lower than that of barium
- The ionization energy of calcium is lower than that of magnesium
- The ionization energy of calcium is higher than that of beryllium
- The ionization energy of calcium is lower than that of strontium
27. Mark the correct statement choose one among the following which is correct:
- Electron affinity is a measure of energy required to remove the electron
- Electron affinity is a measure of energy released by adding an electron
- Electron affinity is a measure of energy required to excite an electron
- Electron affinity is measure of energy released by removing an electron
28. Mark the correct statement choose one among the following which is correct:
- Metallic character increases down the group
- Metallic character increases from left to right along a period
- Metallic character remains the same from left to right along a period
- Metallic character remains the same down the group
29. Mark the correct statement choose one among the following which is correct:
- Melting points of halogens decrease down the group
- Melting points of halogens increase down the group
- Melting points of halogens remain the same throughout the group
- 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:
- Covalent character of metal halides increases from left to right in a period
- Boiling points of group IVA hydrides decrease down the group
- Ionic character of hydrides increases from left to right in a period
- The basicity of group IIA oxides decreases on descending the group