Chemistry Questions and answers

Topics

  1. General Science
    1. Assertions and Reasons
    2. Biology
    3. Chemistry
    4. Physics
    5. Inventions
31). Match the following :
A. Aluminium 1. Monazite
B. Uranium 2. Pith blende
C. Thorium 3. Bauxite
D. Lead 4. Galena
5. Haematite
Below options are given in A B C D order.
A). 5 3 2 4
B). 3 2 4 1
C). 3 2 1 4
D). 2 3 1 5
32). An alloy used in making heating elements for electric heating devices is :
A). solder
B). alloy steel
C). nichrome
D). German silver
33). The filament of an electric bulb is made of :
A). iron
B). nichrome
C). tungsten
D). graphite
34). Consider the following statements regarding graphite :
1. It is an allotrope of carbon.
2. It is a good conductor of heat and electricity.
3. It can be artificially produced.
Of these statements :
A). 1, 2 and 3 are correct
B). 1 and 2 are correct
C). 1 and 3 are correct
D). 2 and 3 are correct
35). Carbon, diamond and graphite are together called :
A). isomers
B). allotropes
C). isomorphs
D). isotopes


36). Galvanised iron sheets have a coating of :
A). tin
B). lead
C). zinc
D). chromium
37). Which of the following metals was first discovered by man?
A). Bronze
B). Silver
C). Iron
D). Copper
38). Among the various allotropes of carbon :
A). diamond is the hardest, lamp black is the softest
B). diamond is the hardest, coke is the softest
C). coke is the hardest, graphite is the softest
D). diamond is the hardest, graphite is the softest
39). Which of the following is the correct sequence of the following elements in increasing order of their relative densities?
1. Mercury 2. Gold 3. Lead 4. Aluminium
A). 3, 2, 1, 4
B). 3, 1, 4, 2
C). 4, 1, 3, 2
D). 4, 3, 1, 2
40). Which one of the following is the basis of modern periodic table?
A). Atomic mass
B). Atomic number
C). Atomic size
D). Atomic volume
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