NTSE Chemistry Metals and Non Metals MCQs Set A

Question: The most reactive of the following metals is -         

• a) Ca
• b) AI
• c) Ni
• d) Pb

Answer: Ca

Question: Which pair of following metals do not react with dilute sulphuric acid ?

• a) Cu and Na
• b) Au and Pt
• c) Pb and Au
• d) Mg and Pt

Answer: Au and Pt

Question: Metals occur in the native form because of their -

• a) High electro negativity
• b) High reactivity
• c) Low reactivity
• d) Low density

Answer: Low reactivity

Question: Which of the following pair will not produce dihydrogen gas ?

• a) Cu + HCI (dil)
• b) Fe + H2SO4 (dil)
• c) Mg + Steam
• d) Na + H2O

Answer: Cu + HCI (dil)

Question: Which one of the following is needed in photolysis of water ?

• a) Magnesium
• b) Manganese
• c) Iron
• d) Zinc

Answer: Manganese

Question: In the manufacture of iron from haematite, limestone is added to act as -

• a) a flux
• b) a slag
• c) a reducing agent
• d) an oxidising agent

Answer: a flux

Question: Which oil is used as frother in froth floatation process ?

• a) Mustard oil
• b) Coconut oil
• c) Olive oil
• d) Pine oil

Answer: Pine oil

Question: Calcination and roasting processes are carried out in-

• a) Blast furnace
• b) Reverberatory furnace
• c) Electrical furnance
• d) Muffle furnace

Answer: Reverberatory furnace

Question: Poling process is used for the removal of -

• a) Cu2O from Cu  
• b) Al2O3 from Al 
• c) Fe2O3 from Fe
• d) In all the these

Answer: Cu2O from Cu  

Question: Zone refining is a method to obtain -

• a) Ultra pure halides
• b) Ultra pure carbonates
• c) Ultra pure metals
• d) Ultra pure oxides

Answer: Ultra pure metals

More Questions...................

Question: Essential constituent of amalgam is -

• a) An alkali metal
• b) Silver
• c) Mercury
• d) Iron

Answer: Mercury

Question: Aluminum is more reactive than iron. But aluminum is less easily corroded than iron because -

• a) Oxygen forms a protective oxide layer on aluminum
• b) Aluminum is a noble metal
• c) Iron undergoes reaction easily with water
• d) Iron forms mono and divalent ions

Answer: Oxygen forms a protective oxide layer on aluminum

Question: An alloy which does not contain copper, is -

• a) Bronze
• b) Magnesium
• c) Brass
• d) German silver

Answer: Magnesium

Question: To keep correct time, modern watches are fitted with balance wheel made up of -

• a) Steel
• b) Alnico
• c) Invar
• d) Copper

Answer: Invar

Question: Which of the following pairs of elements can form alloy ?

• a) Zn & Pb
• b) Fe & Hg
• c) Fe & C
• d) Hg & Pt

Answer: Fe & C

Question: Sulphur dioxide is

• a) Basic oxide
• b) Acidic oxide
• c) Neutral oxide
• d) None of these

Answer: Acidic oxide

Question: The most favorably conditions of temperature and pressure for the oxidation of SO2 into SO3 are -

• a) High temperature and high pressure
• b) Low temperature and low pressure
• c) High temperature and low pressure
• d) Low temperature and high pressure

Answer: Low temperature and high pressure

Question: Whish of the following statements is true -

• a) Both rhombic and monoclinic sulphur are soluble in water
• b) Both rhombic and monoclinic sulphur are soluble in carbon di sulphide
• c) Both rhombic and monoclinic sulphur are insoluble in carbon di sulphide
• d) Rhombic sulphur can be converted into monoclinic sulphur but reverse is not possible

Answer: Both rhombic and monoclinic sulphur are soluble in carbon di sulphide

Question: Nitric acid oxidises sulphur to-

• a) SO2 
• b) SO3
• c) H3SO4    
• d) None of these

Answer: H3SO4    

Question: The m.p. of sulphur is -

• a) 1150C  
• b) 380 K
• c) 1500C
• d) 315 K

Answer: 1150C  

Question: Anhydride of sulphuric acid is -

• a) SO2
• b) SO3
• c) HSO4-  
• d) SO4^-2

Answer: SO3

Question: When sulphur dioxide is bubbled through sodium hydroxide solution, then-

• a) Sodium sulphate is produced and hydrogen gas is evolved
• b) Solution turns milky or cloudy in color
• c) Sodium sulphide is produced along with water
• d) None of these

Answer: Solution turns milky or cloudy in color

Question: In which of the following reactions sulphur dioxide is not behaving as a reducing agent ?

• a) SO2 + H2O → H2SO3
• b) SO2 + 2H2S →3S + 2H2P
• c) Both (A) & (B)
• d) K2Cr2O2 + H2SO4 + 3SO2 →K2SO4 + Cr2(SO4)3 + H2O

Answer: Both (A) & (B)

Question: When copper turnings are heated with concentrated sulphuric acid, then :

• a) Oxidation of copper metal occurs
• b) Sulphur dioxide gas is produces
• c) CuSO4 is produced and hydrogen gas is evolved
• d) Both (A) & (B)

Answer: Both (A) & (B)

Question: Metaphosphoric acid is-

• a) H3PO3 
• b) H3PO4 
• c) HPO3   
• d) H4P2O7

Answer: HPO3   

Question: P2O5 is mainly used as -         

• a) Oxidizing agent
• b) Reducing agent
• c) Dehydrating agent
• d) Hydrating agent

Answer: Dehydrating agent

Question: When slightly warm phosphorus is taken in the jar of oxygen, what happens ?

• a) Phosphorus Dioxide (PO2) is produced
• b) Phosphorus Monoxide (PO) is produced
• c) An oxidation reaction takes place
• d) None of these

Answer: An oxidation reaction takes place

Question: Chromium oxide is added in glass to impart -

• a) Red color
• b) Blue color
• c) Ruby color
• d) Green color

Answer: Green color

Question: If excess of NH4OH is added to the blue precipitate of copper (II) hydroxide and (NH4)2SO4, a deep blue solution is formed due to the formatting of -

• a) [Cu(NH3)4]CI2 
• b) [Cu(NH3)4](NO3)2 
• c) [Cu(NH3)4]Br2   
• d) [Cu(NH3)4]SO4

Answer: [Cu(NH3)4]SO4

Question: Which of the following substance is present in the photochromatic glass ?

• a) PbO
• b) Cr2O3
• c) Na2B4O7  
• d) AgBr

Answer: AgBr