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Chemistry
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Chemistry
Chemistry
Chemistry - Section 1
Q1. The structure of NaCl crystal is
1
Body centered cubic
2
Face centered cubic
3
Octahedral
4
Square planar
Q2. “Paramagnetism” is the property of
1
Paired electrons
2
Completely filled electronics subshells
3
Unpaired electrons
4
Completely vacant electronic subshells
Q3. Which of the following phenomenon is considered responsible for Global Warming?
1
Greenhouse effect
2
Fire in coal mines
3
Dry farming
4
Monsoon
Q4. The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
1
atomic structure
2
metallurgy
3
periodic table of contents
4
discovery of elements
Q5. The mass number of an atom is equal to
1
the number of protons
2
the number of protons and electrons
3
the number of nucleons
4
the number of neutrons
Q6. Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be
1
2 : 16 : 2
2
2 : 16 : 1
3
1 : 16 : 2
4
1 : 1 : 1
Q7. The National Chemical Laboratory is situated in
1
New Delhi
2
Bangalore
3
Pune
4
Patna
Q8. The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in
1
1.8 gram of
H_2O
2
12 moles of
KMnO_4
3
0.6N H_2SO_4
4
4.6 gram of
C_2H_5OH
Q9. The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
1
4
2
5
3
2
4
zero
Q10. The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?
1
1/6
2
1/3
3
1/8
4
1/4
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