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Case Based Questions Test: Acids, Bases & Salts - 1


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15 Questions MCQ Test Science Class 10 | Case Based Questions Test: Acids, Bases & Salts - 1

Case Based Questions Test: Acids, Bases & Salts - 1 for Class 10 2022 is part of Science Class 10 preparation. The Case Based Questions Test: Acids, Bases & Salts - 1 questions and answers have been prepared according to the Class 10 exam syllabus.The Case Based Questions Test: Acids, Bases & Salts - 1 MCQs are made for Class 10 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Case Based Questions Test: Acids, Bases & Salts - 1 below.
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Case Based Questions Test: Acids, Bases & Salts - 1 - Question 1

Read the following and answer any questions:

The reaction between MnO2 with HCl is depicted in the following diagram. It was observed that a gas with bleaching abilities was released.

The chemical reaction between MnO2 and HCl is an example of:

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 1 MnO2 gets reduced to MnCl2 as it loses Oxygen

HCl gets oxidised to H2O

Case Based Questions Test: Acids, Bases & Salts - 1 - Question 2

Identify the correct statement from the following:

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 2 MnO2 is getting reduced whereas HCl is getting oxidized

Reaction of MnO2 with aqueous HCI

Case Based Questions Test: Acids, Bases & Salts - 1 - Question 3

What will happen if we take dry HCl gas instead of aqueous solution of HCl?

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 3 Reaction will not occur

Reaction of MnO2 with Aqueous and Dry HCI

Case Based Questions Test: Acids, Bases & Salts - 1 - Question 4

Read the following and answer any questions:

Frothing in Yamuna:

The primary reason behind the formation of the toxic foam is high phosphate content in the wastewater because of detergents used in dyeing industries, dhobi ghat Yamuna’s pollution level is so bad that parts of it have been labelled ‘dead’ as there is no oxygen in it for aquatic life to survive.

Predict the pH value of the water of river Yamuna if the reason for froth is high content of detergents dissolved in it.

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 4 Detergents are bases . Bases have a pH greater than 7
Case Based Questions Test: Acids, Bases & Salts - 1 - Question 5

The table provides the pH value of four solutions P, Q, R and S

Which of the following correctly represents the solutions in increasing order of their hydronium ion concentration?

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 5

If the hydronium concentration increases, the pH decreases , causing the solution to become more acidic

pH → 11 < 9="" />< 5="" />< />

So, hydronium ion concentration will be of the order, S < q="" />< r="" />< />

pH SCALE

Case Based Questions Test: Acids, Bases & Salts - 1 - Question 6

If a sample of water containing detergents is provided to you, which of the following methods will you adopt to neutralize it?

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 6 Neutralization takes place when Acid and Base react to form Salt and Water

Acid + Base → Salt + Water

Detergent is a base and Vinegar is an acid, thus neutralisation takes place.

Neutralization Reaction

Case Based Questions Test: Acids, Bases & Salts - 1 - Question 7

Study the given table and answer the following questions. It shows the pH value of the plaque (which collects around teeth) surrounding the teeth of a child over 3 hrs.

The three constituents of plaque are

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 7

The constituents of plaque are acid, saliva, bacteria and food.

Case Based Questions Test: Acids, Bases & Salts - 1 - Question 8

State the time during the day when the condition is most favourable for the process of tooth decay.

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 8 Time 4.0, lowest pH indicates the highest amount of acid produced by the bacteria.
Case Based Questions Test: Acids, Bases & Salts - 1 - Question 9

Suhana takes three beakers A, B and C filled with aqueous solutions of glucose, alcohol and hydrochloric acid respectively as shown in the following figure:

Which of the following statements is correct in terms of glowing of the bulb when the switch is ON?

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 9 Bulb A and B do not glow but bulb C glows.
Case Based Questions Test: Acids, Bases & Salts - 1 - Question 10

Which of the following are present in a dilute aqueous solution of hydrochloric acid?

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 10 In a dilute aqueous solution of hydrochloric acid, H3O+ + Cl ions are present.
Case Based Questions Test: Acids, Bases & Salts - 1 - Question 11

Study the given experimental set-up and answer the following questions.

The above experimental set up shows reaction between metal and

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 11 It is a reaction between a metal (Zn) and an acid (H2SO4)
Case Based Questions Test: Acids, Bases & Salts - 1 - Question 12

Write the products formed in the above process:

 Zn (s) + H 2 SO 4 (g) → 

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 12

Zinc sulphate and hydrogen gas

Zn (s) + H 2 SO 4 (g) → ZnSO 4 (s) + H 2 (Zinc) 

Case Based Questions Test: Acids, Bases & Salts - 1 - Question 13

A metal is treated with dilute sulphuric acid. The gas evolved is collected by the method shown in the figure:

Name the gas evolved:

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 13 Hydrogen gas. It is soluble in water.
Case Based Questions Test: Acids, Bases & Salts - 1 - Question 14

What nature of hydrogen is used as a fuel in rocket:

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 14 Liquid hydrogen is the fuel used in rockets and various spaceships. It is light and extremely powerful rocket propellant, has lowest molecular weight and burns with extreme intensity. In combination with an oxidizer such as liquid oxygen, liquid hydrogen yields the highest specific impulse.
Case Based Questions Test: Acids, Bases & Salts - 1 - Question 15

P, Q, R are different colourless solids, while S is a colourless solution. They are (in random order) Sodium chloride (NaCl), Calcium Carbonate (CaCO3), Acetic acid (CH3COOH) and Phenolphthalein indicator. Small amount of the above substances were added in pairs (e.g. P with Q; Q with R etc.) to a small amount of water in a test tube. They give the following results as shown in the observation table. Observation Table:

Which of the following reaction is incorrect:

Detailed Solution for Case Based Questions Test: Acids, Bases & Salts - 1 - Question 15

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