Ch 7 - Salts
Worksheet 7.1
For each of the following statements, write true or false.
1 All acids contain oxygen.
2 Acids turn the Universal Indicator solution yellow or red.
3 Citric acid is found in oranges.
4 The formula for magnesium sulfate shows that there are four atoms of sulfur.
5 Some acids are corrosive.
6 Acids react with some metals to form salts.
7 Acids have a pH of more than 7.
8 The formula for sulfuric acid is H2SO4.
9 Sodium hydroxide is an acid.
10 To test for hydrogen, you should place a lighted splint in the gas. If it makes a squeaky pop
sound when it burns, it is hydrogen.
11 Acids have a pH of less than 7.
12 Copper reacts with dilute acid.
13 Acids turn Universal Indicator solution green.
14 Chlorides can be formed by the reaction of a metal with hydrochloric acid.
15 Citrates are formed using citric acid.
16 It is safe to put the metal sodium into dilute acid.
17 Ammonium sulfate is a salt.
18 The gas hydrogen is released when an acid reacts with a metal.
19 The formula for nitric acid is HCl.
20 The salt magnesium nitrate is made using citric acid.
21 Carbon dioxide forms an acid when dissolved in water.
22 The salt formed from hydrochloric acid and zinc is zinc hydrochloride.
23 You should wear safety glasses when you use acids in the laboratory.
24 All acids are harmful.
25 Acids all contain hydrogen.
Guys please solve all of the question I will mark as brainlist
Answers
True statements: 1,3,4,5,6,8,9,11,14,17,19,20,21,23,24 and 25
other are false, but please read the book to clarify your doubts if you have any
plz....mark my answer brainliest
Force is push or pull acting on a body which tends to change its state of rest or of motion.
It is denoted by "F".
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Additional information-
SI unit of force is Newton(N).
C.G.S (centimetre gram second) unit of force is dyne.
The direction in Which the body is pushed or pulled is called direction of the force.
Effects of force -
A force can change the direction of a moving object.
A force can change the shape and size of an object.
A force can change the speed of a moving object.
A force acting on a body can change its state of motion or rest.
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