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Q1. Due to its semiconductor properties the non-metal used in computer, T.V. etc. is
(a) Carbon
(b) Silicon
(c) Bromine
(d) Fluorine
(b) Silicon
Q2. What happens when calcium is treated with water?
(i) It does not react with water.
(ii) It reacts violently with water.
(iii) It reacts less violently with water.
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium.
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (ii)
(d) (iii) and (iv)
(d) (iii) and (iv)
Q3. Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
(a) H2SO4
(b) HCl
(c) HNO3
(d) All of these
(c) HNO3
Q4. Which of the following metals are obtained by electrolysis of their chlorides in molten state?
(i) Na
(ii) Ca
(iii) Fe
(iv) Cu
(a) (i) and (iv)
(b) (iii) and (iv)
(c) (i) and (iii)
(d) (i) and (ii)
(d) (i) and (ii)
Q5. An alloy reacted with dilute hydrochloric acid to produce a gas which ‘pops’ a lighted splint. The residue reacted with dilute nitric acid to form a blue solution. Which one of the following pairs of metals is present in the alloy?
(a) Copper and lead
(b) Lead and magnesium
(c) Copper and magnesium
(d) Lead and zinc
(c) Copper and magnesium
Q6. Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)
(c) (ii) and (iv)
Q7. Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(i) Au
(ii) Cu
(iii) Na
(iv) K
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (iii)and (iv)
(a) (i) and (ii)
Q8. Metal M occurs in the Earth’s crust as its oxide M2O3. An alloy of this metal is used in making aircrafts. The ore of the metal M is
(a) magnetite
(b) haematite
(c) bauxite
(d) pyrolusite
(c) bauxite
[Q9. Consider The Following Statements, Choose The Incorrect One:
[A]. Gold being least reactive metal has been placed at the bottom in the series.
[B]. If a metal is below hydrogen in the activity series, then it will easily react with water and acids to produce hydrogen gas.
[C]. Potassium is the most reactive metal here, so it has been placed at the top in the reactivity series.
[D]. All the metals placed below hydrogen in the reactivity series lose electrons less readily than hydrogen.
[B]. If a metal is below hydrogen in the activity series, then it will easily react with water and acids to produce hydrogen gas.
Q10. Which Of The Following Statement Is Or Are Incorrect?
[A]. Most non-metals produce acidic oxides when dissolve in water.
[B]. Platinum, is an allotrope of carbon, is the hardest natural substance known and has a very high melting and boiling point.
[C]. Alkali metals (lithium, sodium, potassium) are so soft that they can be cut with a knife.
[D]. All metals except mercury exist as solids at room temperature.
[B]. Platinum, is an allotrope of carbon, is the hardest natural substance known and has a very high melting and boiling point.
Q11. Generally, Metals React With Acids To Give Salt And Hydrogen Gas. Which Of The Following Acids Does Not Give Hydrogen Gas On Reacting With Metals (Except Mn And Mg)?
[A]. H2SO4
[B]. HCl
[C]. HNO3
[D]. All of these
[C]. HNO3
Q12. Which Of The Following Are Not Ionic Compounds?
[A]. KCl, HCl
[B]. HCl, CCl4
[C]. CCl4, NaCl
[D]. KCl, CCl4
[B]. HCl, CCl4
Q13. Which Of The Following Statement Is Or Are Correct?
[A]. Metals usually displace hydrogen from dilute acids.
[B]. Metals react with dilute hydrochloric acid to give metal chlorides and hydrogen gas.
[C]. Magnesium reacts quite rapidly with dilute hydrochloric acid forming magnesium chloride and hydrogen gas.
[D]. All the above
[D]. All the above
Q14. Mohan Is Writing Some Statements, Choose The Incorrect Statements And Help Him:
[A]. The most abundant non-metal in the earth’s crust is oxygen.
[B]. The most abundant metal in the earth’s crust is Aluminium.
[C]. Oxygen (O) is a non-metal which forms positively charged oxide ions (O2+) by gaining electrons.
[D]. Carbon is one of the most important non-metals because all the life on this earth is based on carbon compounds.
[C]. Oxygen (O) is a non-metal which forms positively charged oxide ions (O2+) by gaining electrons.
Q15. Consider The Following Statement And Choose The Incorrect One:
[A]. Potassium oxide is also a basic oxide which reacts with water to form an alkali called potassium hydroxide.
[B]. Magnesium oxide dissolves in water partially to form magnesium hydroxide.
[C]. Sulphur dioxide is a basic oxide which reacts with water to form an alkali called sulphur dioxide.
[D]. Magnesium oxide solution turns red litmus to blue, it is basic in nature.
[C]. Sulphur dioxide is a basic oxide which reacts with water to form an alkali called sulphur dioxide.
Q16. Non-metals form:
(a) basic oxides
(b) unstable hydrides
(c) covalent volatile halides
(d) gases on heating.
(c) covalent volatile halides
Q17. Which of the following is an alloy?
(a) steel
(b) bronze
(c) brass
(d) all these
(d) all these
Q18. 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
(a) 18
Q19. 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.
(b) 18
Q20. 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.
(a) Na and K
Q21. 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.
(d) AgNO3 solution and copper metal.
Q22. 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.
(c) Applying a coating of zinc
Q23. 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.
(a) calcium
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