Question

STD: VII
DATE: 18/3/2021
MARKS: 10
Lesson no. 13 and 14
Q.1. Fill in the blanks
3M
1. The substance formed by chemical combination of two
or more elements is a
2. Iron articles are given a thin coat of zinc to prevent corrosion
called
3. The changes that can occur in a forward and reverse direction
again and again are called
Q.2.Write the names of the elements from the following Symbols.
3M
He, Be, B, N, Ar, K, Na, Mg, C1
Q.3. Complete the concept map
Methods of separating mixtures
2M
Using separating
funnel
Purification
of impure
liquids
Mixtures of
liquid and
insoluble
Two or more
substances in
small proportion
in same solution
solids
2M
Q.4. Classify into elements, mixtures and compound
Water (H2O), bhel, steel, gold, sugar, sherbet, oxygen,
brass​

Answer 1

Answer:

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Explanation:

STD: VII

DATE: 18/3/2021

MARKS: 10

Lesson no. 13 and 14

Q.1. Fill in the blanks

3M

1. The substance formed by chemical combination of two

or more elements is a

2. Iron articles are given a thin coat of zinc to prevent corrosion

called

3. The changes that can occur in a forward and reverse direction

again and again are called

Q.2.Write the names of the elements from the following Symbols.

3M

He, Be, B, N, Ar, K, Na, Mg, C1

Q.3. Complete the concept map

Methods of separating mixtures

2M

Using separating

funnel

Purification

of impure

liquids

Mixtures of

liquid and

insoluble

Two or more

substances in

small proportion

in same solution

solids

2M

Q.4. Classify into elements, mixtures and compound

Water (H2O), bhel, steel, gold, sugar, sherbet, oxygen,

brass​