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

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Important Questions on Chemistry

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Match the following

I. Bauxite (a) Cu
II. Monazite (b) U
III. Malachite (c) Th
IV. Pitch blende (d) Al

 

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Match List-I and List-II :

  List-I   List-II
a Haematite i Al2O3·xH2O
b Bauxite ii Fe2O3
c Magnetite iii CuCO3·Cu(OH)2
d Malachite iv Fe3O4

Choose the correct answer from the options given below :

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Match List-I with List-II :

  List-I
(Name of ore/mineral)
  List-I
(Chemical formula)
a Calamine i ZnS
b Malachite ii FeCO3
c Siderite iii ZnCO3
d Sphalerite iv CuCO3·Cu(OH)2

Choose the most appropriate answer from the options given below :

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Which one of the following is not true for the form of carbon known as diamond?
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Which among the following is not a mineral of iron?
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In medicine, ______ is a device such as a small metal plate or needle that carries electricity from an instrument to a patient for treatment or surgery.
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Which of the following is the Ore of Cu?

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Which one of the following is used for storing biological tissues?
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Sulphide ores are common for the metals:
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Match List-I with List-II.

List-I List-II
(a) Siderite (i) Cu
(b) Calamine (ii) Ca
(c) Malachite (iii) Fe
(d) Cryolite (iv) Al
    (v) Zn

Choose the correct answer from the options given below:

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Which one of the following elements is involved in the control of water content of the blood?
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The alloy containing a non-metal is:
MEDIUM
Which one of the following metals has both malleability and ductility properties ?
MEDIUM
Which one of the following is the correct reactivity order of metals reacting with dilute HCI?
HARD

What are the constituents of alloy solder?

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Which one of the following does not form oxide on reaction with oxygen?
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Match List-I with List-II.

  List-I
(Ore)
  List-II
(Element Present)
a Kernite p Tin
b Cassiterite q Boron
c Calamine r Fluorine
d Cryolite s Zinc

Choose the most appropriate answer from the options given below:

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Which of the following mixture can form an alloy?