ICSE Class 10 Chemistry 2022 Semester-1 Sample Paper
1. 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. The colour change observed when the solution of magnesium hydroxide is tested with the following indicators:
- phenolphthalein turns colourless to pink
- methyl orange remains orange
- phenolphthalein remains colourless
- blue litmus solution turns red
3. The compound which is a non-electrolyte:
- KCl (aq)
- H2SO4 (dil)
- CCl4 (l)
- CH3COOH (aq)
4. Twice the vapour density gives:
- Actual vapour density
- Relative vapour density
- Molecular mass
- Molar volume
5. The number of lone pair of electrons in the nitrogen atom in ammonia molecule:
- One
- Two
- Three
- Four
6. Elements with similar valence shell configuration in a Periodic Table are placed in:
- different groups
- same period
- different period
- same group
7. The gas liberated when sodium sulphite reacts with dilute sulphuric acid:
- Carbon dioxide
- Hydrogen
- Hydrogen sulphide
- Sulphur dioxide
8. Thickness of metal coating during electroplating depends on:
- Duration of current passage
- A low current
- Nature of cathode
- Purity of anode
9. Ionic bonding is seen in:
- Methane
- Hydrogen
- Ammonia
- Sodium oxide
10. 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. When an electron is added in the valence shell:
- energy is released
- energy is absorbed
- energy remains same
- none of the above
12. The most electronegative element is:
- Sodium
- Aluminium
- Bromine
- Fluorine
13. The bond in Carbon Tetrachloride is:
- Single Covalent Bond
- Double Covalent Bond
- Ionic bond
- Triple Covalent Bond
14. The type of bonding present in the nitrogen molecule:
- Single Covalent Bond
- Double Covalent Bond
- Polar Covalent bond
- Triple Covalent Bond
15. 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. 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. 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. The colour of the precipitate formed when ferrous ions react with ammonium hydroxide solution:
- Blue
- Reddish brown
- Dirty green
- white
19. During ionisation, metals lose electrons this change can be called:
- Oxidation
- Reduction
- Redox
- Displacement
20. 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. The property which decreases from left to right across the periodic table:
- Electron affinity
- Electro negativity
- Ionisation energy
- Metallic character
22. 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. Select the ion that would get selectively discharged from the aqueous mixture of the ions listed below:
- SO4-2
- NO3-1
- OH-1
- Cl-1
24. Hydronium ion is formed when a molecule of water combines with:
- Hydrogen atom
- Proton
- Hydrogen molecule
- Oxygen atom
25. 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. The hydroxide which is soluble in excess ammonium hydroxide:
- Lead hydroxide
- Ferrous hydroxide
- Zinc hydroxide
- Ferric hydroxide
27. 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. H2Y is the formula of a compound. What is the valency exhibited by Y?
- 1
- 2
- 3
- none of the above
29. The particles which attract one another to form electrovalent compounds are:
- Electrons
- Protons
- Ions
- Molecules
30. 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. The salt formed by partial replacement of hydrogen ion of an acid by a basic radical.
- Sodium sulphite
- Magnesium hydroxide
- Potassium sulphate
- Zinc hydrogen sulphite
32. Alkali which dissociates only partially in aqueous solution:
- Lithium hydroxide
- Calcium hydroxide
- Potassium hydroxide
- Sodium hydroxide
33. 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. 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. The simplest ratio of the atoms of carbon and hydrogen is 1:1. Identify the possible molecular formula.
- C6H6
- C2H4
- C6H2
- C3H4
36. The empirical formula of the compound is CH2O, the possible molecular formula can be:
- C3H6O3
- C2H4O
- C4H3O2
- C4H6O2
37. 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.
(a) Identify the most electronegative element.
- Li
- Ne
- Z
- J
(b) How many Valence electrons are present in Q?
- 3
- 5
- 15
- 4
(c) The formula of the compound formed between E and O is
- EO
- E3O2
- E2O3
- EO3
(d) The type of bond formed between A and X:
- Ionic bond
- Metallic bond
- Covalent bond
- Coordinate bond