Profile
Settings
Refer your friends
Sign out
Metals constitute the vast majority of the elements in the periodic table. Alkali metals, transition metals, lanthanides, actinides, and alkaline earth metals are all included in this category. On a periodic table, metals are separated from nonmetals by a zigzag line that runs from carbon to radon, and then back again. Phosphorus, selenium, and iodine are the elements that exist between the two.
The non-metals are located in the upper right-hand portion of the periodic table, above the metals. Non-metals do not have the characteristics of being shiny, malleable, or ductile, nor do they have the characteristics of being good conductors of electricity. We can distinguish between metals and nonmetals based on the properties of non-metals, which is one way of doing so.
1. Aluminum is used in the production of cooking utensils. Which of the following properties of aluminum is responsible for the occurrence in question?
(i) Good Thermal conductivity
(ii) are both excellent
(iii) Ductility
(iv) The melting point is extremely high.
a) (i)and (ii)
b) (i) and (iii)
c) (ii) and (iii)
d) (i) and (iv)
Answer :d
2. Which element is very abundant in the earth?
a) Iron
b) Aluminum
c) Calcium Sodium
d) Sodium
Answer: b
3. Among metals, which is the least efficient heat conductor.
a) Lead
b) Mercury
c) Calcium
d) Sodium
Answer: a
4. In order to make the bells and strings of musical instruments such as the Sitar and the Violin, which property of metals is used?
a) Sonorousness
b) Malleability
c) Ductility
d) Conductivity
Answer : a
5. Al2O3 + 2NaOH → …… + H2O
a) Al(OH)3
b) Na2O
c) NaAlO2
d) AlNaO2
Answer: c
6. Which of the following is the correct order of the metals in the given list in terms of their reactivity, as indicated by the arrows?
a) Zinc >Iron>Magnesium>Sodium;
b) Sodium> Magnesium>Iron>Zinc;
c) Sodium >Zinc>Magnesium>Iron;
d) Sodium>Magnesium>Zinc>Iron
Answer: d
7. Which of the following pairs of reactions will result in a displacement reaction?
a) FeSO4 solution and copper metal
b) AgNO3 solution and copper metal
c) CuSO4 solution and silver metal
d) NaCl solution and copper
Answer: b
8. Non-metals form covalent chlorides because
a) they are capable of donating electrons to chlorine
b) they are capable of sharing electrons with chlorine
(c) they are capable of donating electrons to chlorine atoms to form chloride ions
d) they are incapable of sharing electron with chlorine atoms
Answer: b
9. On prolonged reaction of iron with steam, which of the following oxides of iron would be produced?
a) FeO
b) Fe2O3
c) Fe3O4
d) Fe2O3 and Fe2O4
Answer: c
10. Which of the following tyre compounds is not an ionic compound?
(i) KCl
(ii) HCl
(iii) CCl4
(iv) NaCl
a) (i) and (ii)
b) (ii) and (iii)
c) (iii) and (iv)
d) (i) and (iii)
Answer: b is the correct answer.
11) Elements X, Y, and Z are configured in the following ways in terms of their electronic configuration:
X=2,4; Y=2,7; Z =2,1
Which two elements will combine to form an ionic compound, and what is the correct formula for that compound, are you asking?
a) X2Y
b) ZY
c) XZ3
d) Y2Z
Answer: b
12) Sodium, potassium, magnesium, and other highly reactive metals are extracted by the following methods:
a) electrolysis of their molten chloride;
b) electrolysis of their molten oxides; and (c) reduction by aluminum
d) Carbon dioxide reduction
Answer: a
14. Which of the following non-metals has a lustrous sheen?
a) oxygen
b) nitrogen
c) iodine
d) sulfur
Answer: C
14. The following are examples of amphoteric oxides:
a) Na2O
b) K2O
c) Al2O3
d) MgO
Answer: C
15. In the following list, choose the one that is an acidic oxide.
a) Na2O
b) carbon dioxide
c) carbon monoxide
d) aluminum oxide
Answer: c
16. ‘X’ has the atomic number 12 and is found in the periodic table. Which inert gas is the most similar to X?
a) He
b) Ar
c) Ne
d) Kr
Answer: c
Detailed explanation: The reason is that ‘X’ represents Magnesium, and Argon (Ar) with atomic number 12 is the inert gas that is the closest to it.
17. The process by which a carbonate ore is heated to high temperatures in the absence of oxygen in order to convert it to metal oxide is referred to as
a) roasting
b) reduction
c) calcination
d) smelting.
Answer : c
18. The oxidation of moderately reactive metals such as zinc, iron, nickel, tin, copper, and so on is reduced by using
a) Aluminium as reducing agent
b) Sodium as reducing agent
c) Carbon as reducing agent
d) Calcium as reducing agent
Answer: c
19. …… and…… are ignited with a burning magnesium ribbon in thermite welding, which results in the production of molten iron metal as well as a significant amount of heat being released.
a) Iron (III) oxide and aluminium powder are used in this process.
b) iron (II) oxide and aluminium powder
c) Iron (III) chloride and aluminium powder
d) Iron (III) sulphate and aluminium powder
Answer: a
20. Galvanisation is a technique for protecting iron from corrosion by coating it with a thin layer of
a) Gallium
b) Aluminium
c) Zinc
d) Silver
Answer: c
21. An element X is soft and can be cut with a knife, according to the definition. This is extremely reactive to air and cannot be kept open in the presence of air for long periods of time. When it comes into contact with water, it reacts violently. Choose one of the elements from the list below.
a) Mg
b) Na
c) P
d) Ca
Answer: b
22. The reaction between X and Y results in the formation of compound Z. X loses an electron, and Y gains an electron as a result of this. Which of the following characteristics is not demonstrated by Z?
a) The melting point is high
b) The melting point is low
c) When in a molten state, it conducts electricity
d) It manifests itself as a solid.
Answer: c
Explanation: The reason for this is that Z is an ionic compound. It has a high melting point, making it a good material for making ice.
23. The electronic configurations of three elements X, Y, and Z are as follows:
X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2
Which of the following statements is true?
The following are true: (a) X is a metal (b) Y is a metal (c) Z is a non-metal (d) Z is a metal and Y is a non-metal
Answer: c
Detailed explanation: The reason for this is that, according to the electronic configuration, Y represents chlorine and Z represents magnesium.
24. Amalgam is a combination of the elements
a) copper and tin
b) mercury
c) lead and tin
d) copper and zinc
Answer: b
25. Objects made of copper lose their lustre and develop a green coating made of
a) copper oxide
b) copper hydroxide and copper oxide
c) basic copper carbonate
d) copper carbonate
Answer:c
