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- 1. Multiple Choice
The trend in metallic nature of metals as we go from top to bottom in a group
increases
decreases
neither increases nor decreases
none of the above
- 2. Multiple Choice
The colour change is observed when the solution of magnesium hydroxide is tested with the following indicators:
blue litmus solution turns red
phenolphthalein turns colourless to pink
methyl orange remains orange
phenolphthalein remains colourless
- 3. Multiple Choice
The compound which is a non-electrolyte:
KCl (aq)
H2SO4 (dil)
CCl4 (l)
CH3COOH (aq)
- 4. Multiple Choice
Twice the vapour density gives:
Actual vapour density
Relative vapour density
Molecular mass
Molar volume
- 5. Multiple Choice
The number of lone pair of electrons in the nitrogen atom in ammonia molecule:
1
2
3
4
- 6. Multiple Choice
Elements with similar valence shell configuration in a Periodic Table are placed in:
different groups
same period
different period
same group
- 7. Multiple Choice
The gas liberated when sodium sulphite reacts with dilute sulphuric acid:
Carbon dioxide
Hydrogen
Hydrogen sulphide
Sulphur dioxide
- 8. Multiple Choice
The thickness of metal coating during electroplating depends on:
Duration of the current passage
A low current
Nature of cathode
Purity of anode
- 9. Multiple Choice
Ionic bonding is seen in:
Methane
Hydrogen
Ammonia
Sodium oxide
- 10. Multiple Choice
The molecular formula of an organic compound is C6H12O6 and the empirical formula is CH2O, the value of n is:
2
6
1
12
- 11. Multiple Choice
When an electron is added in the valence shell:
energy is released
energy is absorbed
energy remains same
none of the above
- 12. Multiple Choice
The most electronegative element is:
Sodium
Aluminium
Bromine
Fluorine
- 13. Multiple Choice
The bond in Carbon Tetrachloride is:
Single Covalent Bond
Double Covalent Bond
Ionic bond
Triple Covalent Bond
- 14. Multiple Choice
The type of bonding present in the nitrogen molecule:
Single Covalent Bond
Polar Covalent bond
Triple Covalent Bond
Double Covalent Bond
- 15. Multiple Choice
A compound with Empirical formula XY2, has the vapour density equal to its Empirical formula weight, its molecular formula is
X2Y4
X2Y2
XY
X4Y2
- 16. Multiple Choice
Identify one statement that does not hold true for electrorefining of copper:
Electrolyte is acidified CuSO4 solution
Cathode is a thin strip of impure copper
Anode dissolves in the electrolyte
Anode gets thicker.
- 17. Multiple Choice
The observation when ammonium chloride reacts with potassium hydroxide:
A reddish brown gas
A colourless gas which turns moist red litmus blue.
A green coloured gas which turns moist blue litmus paper red.
A colourless gas which turns lime water milky.
- 18. Multiple Choice
The colour of the precipitate formed when ferrous ions react with ammonium hydroxide solution:
Blue
Reddish-brown
Dirty green
white
- 19. Multiple Choice
During ionisation, metals lose electrons this change can be called:
Oxidation
Reduction
Redox
Displacement
- 20. Multiple Choice
The oxide of a metal that reacts both with acid and alkali to form salt and water:
Sodium oxide
Magnesium oxide
Aluminium oxide
Ferrous oxide
- 21. Multiple Choice
The property which decreases from left to right across the periodic table:
Electron affinity
Electro negativity
Ionisation energy
Metallic character
- 22. Multiple Choice
On the basis of electronic configuration the period and group of 𝐵59 is:
2 and IIIA
3 and IIA
4 and VIA
5 and VIIA
- 23. Multiple Choice
Select the ion that would get selectively discharged from the aqueous mixture of the ions listed below:
SO4-1
NO 3-1
OH-1
Cl-1
- 24. Multiple Choice
Hydronium ion is formed when a molecule of water combines with:
Hydrogen atom
Proton
Hydrogen molecule
Oxygen atom
- 25. Multiple Choice
The condition that is most appropriate for electroplating with nickel:
Electrolyte is molten copper sulphate
Anode should be made of impure nickel plate
Alternating current is used
Periodic replacement of cathode is needed.
- 26. Multiple Choice
The hydroxide which is soluble in excess ammonium hydroxide:
Lead hydroxide
Ferrous hydroxide
Zinc hydroxide
Ferric hydroxide
- 27. Multiple Choice
Which statement is not true for electrolysis?
Cations migrate towards cathode
Anions discharge at anode
Anions get reduced during electrolysis
Cations get reduced during electrolysis
- 28. Multiple Choice
H2Y is the formula of a compound. What is the valency exhibited by Y?
1
2
3
none of the above
- 29. Multiple Choice
The particles which attract one another to form electrovalent compounds are:
Electrons
Protons
Ions
Molecules
- 30. Multiple Choice
Which one of the following statements is NOT correct?
Pure water does not allow a current to flow through it
The electrolyte only conducts when in the molten state.
Electrodes that react with the electrolytes are said to be “active”
Ions must be present in the electrolyte in order that it conducts electricity
- 31. Multiple Choice
The salt formed by partial replacement of hydrogen ions. Of an acid by a basic radical.
Sodium sulphite
Magnesium hydroxide
Potassium sulphate
Zinc hydrogen sulphite
- 32. Multiple Choice
Alkali which dissociates only partially in aqueous solution:
Lithium hydroxide
Calcium hydroxide
Potassium hydroxide
Sodium hydroxide
- 33. Multiple Choice
The property that matches with elements of the halogen family are:
. They are chemically highly reactive
They are metallic in nature
They are monoatomic in their molecular form
They have one electron in the valence shell.
- 34. Multiple Choice
Cathode is a reducing electrode because:
. It has less number of electrons.
. It has deficiency of electrons
Cations gain electrons from cathode
Anions lose electrons to cathode
- 35. Multiple Choice
The simplest ratio of the atoms of carbon and hydrogen is 1:1. Identify the possible molecular formula.
C6H6
C2H4
C6H2
C3H4
- 36. Multiple Choice
The empirical formula of the compound is CH2O, the possible molecular formula can be:
C3H6O3
C2H4O
C4H3O2
C4H6O2
- 37. Multiple Choice
Observe the Periodic Table to answer the questions: In the above table some elements are mentioned with their own symbol and position of the Periodic Table while others are shown with a letter.
Answer the following questions pertaining to the same.
-Identify the most electronegative element.
Li
Ne
Z
J
- 38. Multiple Choice
How many Valence electrons are present in Q?
3
5
15
4
- 39. Multiple Choice
The formula of the compound formed between E and O is
EO
E3O2
E2O3
EO3
- 40. Multiple Choice
The type of bond formed between A and X:
Ionic bond
Metallic bond
Covalent bond
Coordinate bond
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