Elements and Compounds - ICSE STD 7 CHEMISTRY Questions - Vidyadip

Question types

Elements and Compounds question types

80 questions across 10 question groups — pick any mix to generate a CHEMISTRY paper with step-by-step answer keys.

80

Questions

10

Question groups

5

Question types

MCQ

[1 Mark Question Answer]

[2 Mark Question Answer]

[3 Mark Question Answer]

[5 Mark Question Answer]

Fill in the blanks.

TRUE / FALSE

Match The Following.

Do as Directed.

Draw the diagram of the following.

Sample Questions

Elements and Compounds questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ1 Mark

Which of the following lose electrons to form cations ?

✓
Metals
B
Non-metals
C
Both a. and b.
D
None of these

Answer: A.

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Q 2MCQ1 Mark

Which among the following shows variable valency ?

A
Zinc
B
Sodium
✓
Iron
D
Calcium

Answer: C.

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Q 3MCQ1 Mark

Which of the following is a triatomic molecule ?

A
Oxygen
B
Sulphur
C
Nitrogen
✓
Ozone

Answer: D.

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Q 4MCQ1 Mark

The symbol of radon is

A
Ra
✓
Rn
C
Rd
D
Ro

Answer: B.

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Q 5MCQ1 Mark

The non-metal which is liquid at room temperature is

A
sulphur
B
chlorine
C
iodine
✓
bromine

Answer: D.

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Q 6[1 Mark Question Answer]1 Mark

Name the polyatomic ion that carries a positive charge.

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Q 7[1 Mark Question Answer]1 Mark

How is an anion formed ?

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Q 8[1 Mark Question Answer]1 Mark

How is a cation formed ?

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Q 9[1 Mark Question Answer]1 Mark

Out of atoms and molecules, which can exist independently?

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Q 10[1 Mark Question Answer]1 Mark

Where is the nucleus of an atom present ?

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Q 11[2 Mark Question Answer]2 Marks

What is a chemical formula ?

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Q 12[2 Mark Question Answer]2 Marks

What is a polyatomic ion ?

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Q 13[2 Mark Question Answer]2 Marks

What is meant by the term ‘variable valency’?

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Q 14[2 Mark Question Answer]2 Marks

The formula of the nitride of a metal $X$ is $XN.$ State the formula of its $a.$ Chloride $b.$ Carbonate.

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Q 15[2 Mark Question Answer]2 Marks

$X(Cl_2)$ is the chloride of a metal $X.$ State the formula of the sulphate and the hydroxide of metal $X.$

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Q 16[3 Mark Question Answer]3 Marks

How is a compound formed ?

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Q 17[3 Mark Question Answer]3 Marks

Give the charge and mass of an electron, a proton and a neutron.

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Q 18[5 Mark Question Answer]4 Marks

Write the difference between monoatomic ions and polyatomic ions with the help of examples.

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Q 19[5 Mark Question Answer]4 Marks

What happens when atoms combine to form a compound? Explain with an example.

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Q 20[5 Mark Question Answer]4 Marks

What is the difference between a molecule of an element and a molecule of a compound ? Give an example of each.

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Q 21[5 Mark Question Answer]4 Marks

Describe the structure of an atom.

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Q 22[5 Mark Question Answer]4 Marks

What is the difference between an atom and a molecule?

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Q 23Fill in the blanks.1 Mark

A/An ____________ is the smallest particle of an element or a compound that is capable of an independent existence.

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Q 24Fill in the blanks.1 Mark

The ____________ is an electrically neutral particle present in the nucleus.

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Q 25Fill in the blanks.1 Mark

A/An ____________ has mass 1/183 time that of a hydrogen atom.

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Q 26Fill in the blanks.1 Mark

__________ have unit positive charge while _____________ have unit negative charge.

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Q 27Fill in the blanks.1 Mark

__________ is the Latin name of copper.

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Q 28TRUE / FALSE1 Mark

The particle formed by the loss or gain of electrons by an atom is called an ion.

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Q 29TRUE / FALSE1 Mark

A proton is electrically neutral.

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Q 30TRUE / FALSE1 Mark

The tiny central core of an atom consisting of protons and neutrons is called the nucleus.

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Q 31TRUE / FALSE1 Mark

The smallest particle of an element that exhibits the properties of that element is called an atom.

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Q 32TRUE / FALSE1 Mark

The symbol of cobalt is C.

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Q 33Match The Following.4 Marks

Column A	Column B
1. Charged particle	a. Element
2. ZnS	b. Ion
3. Positively charged ion	c. Nucleus
4. Central core of an atom	d. Zinc sulphide
	e. Cation

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Q 34Do as Directed.1 Mark

Define the terms.
Ion

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Q 35Do as Directed.1 Mark

Define the terms.
Valency

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Q 36Do as Directed.1 Mark

Define the terms.
Chemical bond

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Q 37Do as Directed.1 Mark

Define the terms $:$ Atomicity

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Q 38Do as Directed.1 Mark

Write names of the compounds by formula. $MgCl_2$

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Q 39Draw the diagram of the following.3 Marks

To show the structure of an atom.

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