Sub code 3011 7.

Hydrogen cannot be obtained from

Shanti Model Secondary School, Tilottama 5 a. Na + H2O b. Cu + dil H2SO4 c. Fe + dil HCl d. Zn + dil
Manigram H2SO4
First Terminal Examination 2080 8. Diamond is harder than Graphite because
Subject: Chemistry F.M=75 Class: 11 a. diamond has free electrons.
Candidates are required to give their answers in their own words as b. graphite has free electrons
far as practicable. The figures in the margin indicate full marks. c. diamond is sp3 hybridized
Group A d. graphite is sp2 hybridized.
Copy the correct answer in your copy. [1x11=11]
9. The order in which the following oxides are arranged according
1. How many protons, electrons and neutrons are present in the
to decreasing basic nature
element 𝑋5′′
a. Na2O, MgO, Al3O3, CuO
a. 5,5,5 b. 5,4,6 c. 6,6,5 d. 5,5,6
b. MgO, Al3O3, CuO, Na2O
2. What is the maximum number of electrons in an atom that can
c. MgO, Al3O3, Na2O,CuO
have quantum number n=4, m= +1
d. CuO, Na2O, MgO, Al3O3
a. 4 b. 16 c. 3 d. 6
10. Which of the following statement is not true about hydrogen
3. An element having atomic mass 40 and electronic configuration
peroxide?
2, 8, 8, 2 which one of the following statement regarding this
a. It is used as bleaching agent.
element is not correct?
b. It is used as antiseptic.
a. It belongs to IIA group.
c. It is used as oxidizing agent.
b. It forms amphoteric oxide.
d. It is used in the manufacture of heavy water.
c. It belongs to IV period.
11. Catenation is the property of
d. It has 20 neutrons.
a. Oxygen b. Sulphur c. Carbon d. none of the above
4. Which of the following has the lowest ionization potential?
a. K+ b. Ca++ c. Cl- d. S2-
5. Which of the following shows redox reaction?
Group B [5x8=40]
a. KNO3 + H2SO4  HNO3 + KHSO4 12. Neil Bohr proposed an atomic theory regarding the atomic
b. 4NO2 + 2H2O + O2  4HNO3 structure. He gave the concept of quantization of atomic orbits using
c. AgNO3 + NaCl  AgCl + NaNO3 physical values of angular momentum and Plank Constant.
d. all of the above a. What is angular momentum of an electron? (1)
6. The oxidation number of Fe in K3[Fe(CN)6] is b. If the radius of first orbit of an atom is 2 units then what will be
a. +2 b. +3 c. +4 d. +6 the radius of third orbit? (2)
c. How does the electron generate light radiation? (1)
d. What is hydrogen spectrum? (1) c. Make lewis structures of N2O and NH3
13. In the reaction Cl2 + NaOH  NaCl + NaClO3 + H2O, d. What is catenation?
a. Is there oxidation and reduction? If yes, indicate. (1) e. What happens when ammonia gas is heated with CuO powder?
b. What is disproportionation reaction? (1)
c. Identify oxidizing and reducing agents in above reaction. ((2) Group C [3x8-24]
d. Give one example of a non-redox reaction. (1) 20. An atom has six electrons in ‘s’ orbitals and eleven electrons in
14. Modern periodic table has been divided into four blocks. ‘p’ orbitals.
a. What are these block? a. Write electronic configuration of that atom in atomic orbitals. [2]
b. How are they classified? b. Identify the group and period of that element. Explain with reason.
c. Why is this table very important for a chemist? [2]
d. Is there any dilemma in saying the positon of Hydrogen is c. What do you expect its electronegativity in its period? Highest or
Periodic table? lowest and how? [2]
e. Define electron affinity. d. Write its reaction with excess of ammonia. [2]
15. a. What are the application of Hydrogen peroxides? (2) 21. Electrolysis is a chemical process in the presence of electricity.
b. How does the use of chloroflorocarbon destroyed the ozone a. Does electricity flow in a solution? If yes then what kind of
layer in stratosphere? (2) solution should it be? [1]
c. Give one test reaction to identify the Ozone. [1] b. What are electrodes? Name the types of electrodes and respective
16. Hydrogen is a diatomic gas. It has wide range of application. reactions that occurs on them. [2]
a. What are the isotopic forms of it? c. What is one Faraday? How many electrons make one Faraday? [2]
b. What are ortho and para hydrogen? d. Find the increase in thickness of an Iron plate having 2 cm2 area
c. Why do scientist choose this gas as a fuel for rocket? that was electroplated with Cu using CuSO4 Solution passing 5A
d. What is electrochemical series? current for two hours. Write the reactions too. [2+1]
e. What is occlusion? 22. Ammonia gas is very important chemical used as a source of
17. Nitric acid is a useful industrial chemical. It is manufactured by chemical fertilizer. Explain its manufacture principle, plant
Ostwald’s process. Describe it with principle reaction, and plant description. What happens when it is passed into CuSO4 for long
structure diagram. time. How is this gas tested in laboratory? [5+2+1]
18. a. What is allotropy? Mention the allotropes of carbon.
b. Why is diamond hardest substance known?
c. Graphite is soft form of Carbon and used an electrical electrode.
Why?
d. What is lamp black? How is it prepared?
19. a. Write the set of quantum numbers for all electrons of Li
b. What happens when ammonium chloride is warmed with NaOH?