Salts

Q.

Distinguish between temporary hardness and permanent hardness?

Q.

Which is called Indian Saltpeter?

Q.

Barium chloride on reacting with ammonium sulfate forms barium sulfate and ammonium chloride. Which of the following correctly represents the type of reaction involved?

(i) Displacement reaction

(ii) Precipitation reaction

(iii) Combination reaction

(iv) Double displacement reaction

1. (i) only

2. (ii) only

3. (iv) only

4. (ii) and (iv)

Q.

what happens when

sodium hydroxide reacts with acetic acid

Q.

What is the total number of black-colored sulfides among ${\mathrm{Ag}}_2\mathrm{S},{\mathrm{Bi}}_2{\mathrm{S}}_3,\mathrm{CoS},\mathrm{CuS},\mathrm{HgS},\mathrm{MnS},\mathrm{NiS},\mathrm{PbS},\mathrm{and}{\mathrm{SnS}}_2$.

1. Two

2. Four

3. Six

4. Eight

Q.

What is group reagent?

Q.

Name a strong base and weak base

Q.

Write the chemical formula for Potash alum.

Q.

Which of the following is a basic salt?

1. CH₃COONa

2. SnCl₂

3. HCl

4. NaCl

Q.

What is the effect of sodium chloride on litmus paper?

1. Blue litmus Red

2. Red litmus blue

3. Methyl orange Red

4. No change

Q. The reaction between an acid and a base to form a salt and water is a reaction.

1. combination
2. neutralisation
3. decomposition
4. addition

Q. What information do you get from the equation
H_{​​​​​​2} + Cl2 = 2HCl

Q.

Organic compounds are those which are obtained from minerals.

1. False

2. True

Q.

Brine is ______% solution of common salt.

1. 10

2. 20

3. 15

4. 5

Q. How can we mix and acid and acid ? How can we mix Nitric acid and Hydrochloric Acid withoutgetting hurt?

Q.

What is definition and use of salt in laboratory?

Q.

What substances are present in the urine of a normal person?

Q.

Sulphuric acid and sodium hydroxide reacts to form sodium sulphate and water.

Q. Can an acid react with an acid?
can a base with a base?

Q.

A milkman added a small pinch of baking soda to fresh milk which had pH close to 6. As a result, pH of the medium is

1. become close to 2

2. became to 4

3. did not undergo any change

4. became close to 8

Q.

NaOH (aq)+ HCl (aq) 》NaCl (aq) +H2O + heat. Whats with tje aq in brackets?

Q. Define salt.

Q. Hydrochloric acid reacts with sodium hydroxide solution to form ______ and water.

1. sodium
2. oxygen
3. sodium carbonate
4. sodium chloride

Q.

Choose the correct statements in regard to salts from the following:

Statement 1: All salts are formed by the reaction of HCl and NaOH.

Statement 2: Salts are formed by the neutralization of acids and bases.

Statement 3: Salts are ionic compounds.

Statement 4: Salts are composed of cations and anions.

Statement 5: Salts are always white in colour.

Statement 6: NaCl is called as common salt.

Statement 7: pH of common salt is 7.

1. Statement 1, 3 and 6 are correct.

2. Statements 1, 3 and 5 are correct.

3. Statements 2 , 3 , 4, 6 and 7are correct.

4. Statements 2, 3 and 6 are correct.

Q. To completely neutralized one molecule of Acetic Acid how many Sodium Hydroxide molecules are required?

Q.

An acid A is produced when bee stings. A mild base B can be used to give relief. Name the acid A and base B.

Q. What is a neutralization reaction?

Q. Indicators prepared in the laboratory are known as indicators.

1. natural
2. organic
3. synthetic

Q.

Explain why -

(i) common salt becomes sticky during the rainy season?

Q.

Fresh milk has pH 6. When it changes to curd, pH becomes________.

1. 7

2. more than 7

3. less than 6

4. remain same