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Metals and Non-Metals Class 10 MCQs Questions with Answers
Question 1.
If metal is found in a free state in nature, it is called its :
(a) native state
(b) crust state
(c) mineral state
(d) none of these.
Answer:
(a) native state
Question 2.
The element found in free state in nature is :
(a) copper
(b) gold
(c) silver
(d) all these.
Answer:
(d) all these.
Question 3.
Metals are extracted from:
(a) compounds
(b) minerals
(c) ores
(d) both minerals and ores.
Answer:
(c) ores
Question 4.
Calcination is :
(a) heating the ore in a limited supply of air
(b) heating the ore in excess of air
(c) cooling the ore
(d) none of these.
Answer:
(a) heating the ore in a limited supply of air
Question 5.
Uranium is :
(a) alkali metal
(b) non-metal
(c) radioactive element
(d) gas
Answer:
(c) radioactive element
Question 6.
Non-metals are:
(a) electropositive elements
(b) electrostatic elements
(c) electronegative elements
(d) always in liquid state.
Answer:
(c) electronegative elements
Question 7.
Non-metals form:
(a) basic oxides
(b) unstable hydrides
(c) covalent volatile halides
(d) gases on heating.
Answer:
(c) covalent volatile halides
Question 8.
Which of the following is an alloy?
(a) steel
(b) bronze
(c) brass
(d) all these
Answer:
(d) all these
Question 9.
The atomic number of an element A is 19. The number of electrons in its ion A+ will be
(a) 18
(b) 19
(c) 20
(d) 21
Answer:
(a) 18
Question 10.
The atomic number of an element B is 17. The number of electrons in its ion B will be:
(a) 17
(b) 18
(c) 19
(d) 20.
Answer:
(b) 18
Question 11.
The elements whose oxides can turn phenolphithalein solution pink are:
(a) Na and K
(b) K and C
(c) Na and S
(d) K and P.
Answer:
(a) Na and K
Question 12.
Which of the following pairs will give displacement reactions ?
(a) NaCl solution and copper metal
(b) MgCl2 solution and aluminium metal
(c) FeSO4 solution and silver metal
(d) AgNO3 solution and copper metal.
Answer:
(d) AgNO3 solution and copper metal.
Question 13.
Which of the following methods is suitable for preventing an iron frying pan from rusting ?
(a) Applying grease
(b) Applying paint
(c) Applying a coating of zinc
(d) All of above.
Answer:
(c) Applying a coating of zinc
Question 14.
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:
(a) calcium
(b) carbon
(c) silicon
(d) iron.
Answer:
(a) calcium
Question 15.
Food cans are coated with tin and not with zinc because :
(a) zinc is costlier than tin .
(b) zinc has a higher melting point than tin
(c) zinc is more reactive than tin
(d) zinc is less reactive than tin.
Answer:
(c) zinc is more reactive than tin
Question 16.
Malleability is exhibited by:
(a) sulphur
(b) iodine
(c) phosphorus
(d) copper.
Answer:
(d) copper.
Question 17.
Which of the following metal will release hydrogen gas on reaction with cold water at room temperature ?
(a) Ag
(b) Al
(c) Cu
(d) Na
Answer:
(d) Na
Question 18.
In case of bond formation between sodium and chlorine, the electron transfer takes place from:
(a) sodium to chlorine
(b) chlorine to sodium
(c) Both (a) and (b)
(d) None of these.
Answer:
(a) sodium to chlorine
Question 19.
The earthly or undersired materials associated with an ore are called :
(a) gangue
(b) mineral
(c) matrix
(d) Both (a) and (c)
Answer:
(d) Both (a) and (c)
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