ICSE 7 Chemistry
Atomic Structure
Question 1:
Electrons are
(d) highly positively charged [Level: Easy]
Question 2:
Which of the following metal has radicals exhibiting more than one specific valency?
(a) Ca
(b) Na
(c) Mg
(d) Fe [Level: Difficult]
Question 3:
Radical with negative charge is
(a) basic radical
(c) polyatomic radical
(d) neutral radical [Level: Easy]
Question 4:
The valency of Cu in CuSO4 is
(a) 3
(b) 1
(d) 4 [Level: Difficult]
Question 5:
What is correct formula for aluminium nitride?
(a) Al3N
(c) Al2N
(d) AlN3 [Level: Difficult]
Question 6:
Valency of Mg2+ radical is 2. Write the molecular formula of following compounds of magnesium.
(b) Magnesium sulphate
(c) Magnesium carbonate
(d) Magnesium hydroxide
(e) Magnesium nitrate [Level: Difficult]
Question 7:
Total how many atoms are present in 2H2O?
(a) 5
(c) 8
(d) 6 [Level: Moderate]
Question 8:
Chemical name of caustic potash is
(b) aluminium hydroxide
(c) sodium hydroxide
(d) calcium hydroxide [Level: Moderate]
Question 9:
Which of the following element/elements have valency 3?
I. Na
II. C
III. Al
IV. P
(a) only III
(b) only II
(c) only I
(d) both III & IV [Level: Moderate]
Question 10:
Write the names of elements present in the following compounds:
2) Potassium hydroxide
3) Calcium sulphate
4) Sodium nitrate [Level: Moderate]
Question 11:
Which among the following is polyatomic molecule?
(a) H2O
(b) O3
(d) CO2 [Level: Moderate]
Question 12:
Ion with positive charge is
(b) anion
(c) polyatomic ion
(d) neutral ion [Level: Easy]
Question 13:
Name the following radicals:
1) HSO4-
2) SO3-
3) MnO4-
4) N3- [Level: Moderate]
Question 14:
No. of atoms in a molecule of element or compound is
(a) variable valency
(b) valency
(c) atomicity
(d) charge [Level: Easy]
Question 15:
Give the group number of the following elements present in the periodic table
2) Argon
3) Silicon
4) Oxygen [Level: Moderate]
Question 16:
Carbon atom combines with 4 hydrogen atoms to form methane. Valency of carbon is
(a) 4
(c) 2
(d) 1 [Level: Moderate]
Question 17:
Symbolic representation of molecule of element or compound is
(a) formula
(b) charge
(d) valency [Level: Easy]
Question 18:
Which among the following is not a radical?
(a) S2-
(b) NH4+
(c) Cr2O72-
(d) O3 [Level: Moderate]
Question 19:
An element belongs to group 17. What would be its valency? Name 2 such elements. [Level: Moderate]
Question 20:
Element X and Y have valencies 2 and 1 respectively. What would be the chemical formula of the compound they would form? [Level: Difficult]
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All About Daily Practice Problems on ICSE 7 Chemistry Atomic Structure NCERT Chapter 4
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