chemical substances class 7

chemical substances class 7

7th Grade

10 Qs

quiz-placeholder

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chemical substances class 7

chemical substances class 7

Assessment

Quiz

Chemistry

7th Grade

Medium

Created by

Sameeksha Singh

Used 240+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

symbol of sodium

k

Fe

Na

Ag

2.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

balance the equation - H2 + O2 = H2O

2H2 + O2 = 2H2O

3H2 + O2 = 3H2O

H2 + O = H2o

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

decomposition reaction is just revers of combination reaction

true

false

4.

FILL IN THE BLANK QUESTION

20 sec • 1 pt

name the ion =

ch3coo-

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

what is neutralisation reaction

a reaction in which two or more substances combine to form a new substances

a reaction between acid and base

a reaction in which a strong element displaces a weak element

6.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

what is the charge of zinc (Zn)

2+

3-

4-

8+

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

what is the name of -

CaCo3

calcium chloride

calcium phosphate

calcium carbonate

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