C-07 — Use of Acid, Base and Salt

Acids release which ion in water?

Which property best describes a weak acid?

Which of the following is a weak acid?

Which of the following is a strong acid?

Which mineral acid is a weak acid?

What is the molecular formula of acetic acid?

What is the molecular formula of sulphuric acid?

What is the structural formula of oxalic acid?

What is the molecular formula of citric acid?

In water, strong acids—

Hydrochloric acid is classified as a—

Which of the following is NOT a strong acid?

Carbonic acid is an example of—

When a wasp or scorpion stings, which substance is released causing irritation and swelling?

Histamine is chemically a—

Vinegar relieves wasp/scorpion sting because it—

Which acid is required in the stomach for digestion?

Soft drinks like Coca-Cola and Sprite favour digestion because they are—

Lactic acid favouring digestion is present in—

Vitamin C is also known as—

Deficiency of vitamin C in human body causes—

Which substance is used to preserve pickles of mango and olive?

Cake, biscuit and bread are puffed by using—

In warm condition, baking soda reacts with yeast and releases which gas to puff baked items?

Household toilet cleaners chiefly contain—

Lead storage batteries in vehicles use which acid?

Ammonium nitrate fertilizer is produced from—

Ammonium sulphate fertilizer is produced from—

Ammonium phosphate fertilizer is produced from—

If concentrated strong acid falls on the body by chance, the affected part should be—

Consider the following fruits that contain organic acids:

The effect of strong acids on most common metals is—

According to the study mentioned in the chapter, acid victims are mostly—

Many acid victims hide themselves from society mainly because of—

Punishment for acid throwing in Bangladesh may be—

Acid throwing crime in Bangladesh is governed under—

Toothpaste mixture changes red litmus paper to blue. This indicates the substance is—

Drinks and fruit juices change blue litmus paper to red. This indicates they are—

When the amount of $HCl$ in the stomach increases beyond normal, the condition is termed—

Excessive intake of acidic beverages is especially harmful when the stomach is—

Which of the following does NOT cause acidity in stomach?

Among the following, the non-food cause of stomach acidity is—

Bacterial infection in stomach often causes—

Which vegetable can reduce stomach acidity?

Which milk-based food item is alkaline in nature and reduces acidity?

Which tea is mentioned as effective in reducing acidity?

The pH of pure water (a neutral substance) is—

A solution with $pH < 7$ is—

A solution with $pH > 7$ is—

As the pH of a solution falls further below 7, its acidity becomes—

The pH of arterial blood in a healthy human is—

Alteration of human blood pH by how much may cause severe health problems even death?

Saliva is most effective at pH approximately—

The pH required for digestion in the stomach is approximately—

An alteration of stomach pH by how much may hamper digestion?

Soil pH usually ranges from—

If soil pH becomes lower than 3.0, which nutrients are lost causing reduced fertility?

Acidic soil is corrected by applying fertilizers containing—

Highly alkaline soil has pH—

In highly alkaline soil, which ion is easily transported to plant roots causing significant harm?

The pH of highly alkaline soil is controlled by applying—

Face washes available in shops typically have pH around—

The pH of matured human skin ranges from—

The pH of skin of newborn babies is close to—

A pH value of urine that indicates healthy condition is—

The chart used to determine pH by comparing colour after adding an indicator is the—

Bases change the colour of red litmus paper to—

Phenolphthalein in a basic solution turns—

Methyl orange in a basic solution turns—

Methyl red in a basic solution turns—

Water-soluble bases (alkalis) produce which ion in water?

Dissociation of $NaOH$ in water produces—

Dissociation of $KOH$ in water produces—

Dissociation of $NH_4OH$ in water produces—

When ants bite, the acid released that causes irritation and pain is—

Consider the chemicals secreted when bees sting:

Calamine lotion used to relieve ant bite contains—

The chemical formula of slaked lime is—

The chemical formula of calcium oxide is—

The chemical formula of limestone is—

Which base is broadly used as a household cleaner?

Toothpaste is chemically a—

Laundry soap used for washing clothes is made from—

Soft soap such as shaving foam is prepared from—

Antacid tablets/syrup used to treat acidity contain—

Caution to follow while using alkalis is—

The general neutralization equation is acid + alkali →

Balance the reaction $2HCl + Mg(OH)_2 \to$ ?

The reaction $CaO + H_2SO_4 \to$ produces—

The balanced reaction $Ca(OH)_2 + H_2SO_4 \to$ produces—

The pH of toothpaste usually lies between—

Consider the alkaline substances present in toothpaste:

Salt is the product obtained by the chemical reaction between—

Chemical formula of table salt is—

Table salt ($NaCl$) is by nature—

Chemical formula of baking soda is—

Aqueous solution of baking soda is acidic because it releases—

Aqueous solution of sodium carbonate is—

Consider why aqueous $Na_2CO_3$ solution turns red litmus blue:

Carbonate salt reacts with acid to produce a new salt and—

The reaction $Na_2CO_3 + HCl \to$ produces—

The reaction $CaCO_3 + H_2SO_4 \to$ produces—

Almost all the salts are solid having—

Which of the following pairs of salts is INSOLUBLE in water?

The eggshell is mainly composed of—

Tasting salt used to enhance the taste of food items is chemically—

Sodium stearate, the salt used as washing soap, has the formula—

The salt present in shaving gel or foam is—

Washing soda used for washing clothes is chemically—

The formula of blue vitriol is—

The formula of potash alum is—

Which pair of salts has strong disinfecting power and is used to kill germs?

Inorganic fertilizers like ammonium nitrate, ammonium phosphate, potassium nitrate are classified as—

The agricultural use of blue vitriol (copper sulfate) is to—

Consider the salts used as catalysts in industry:

In textile and dye manufacturing industries, salt is essential to—

In rubber industry, salt is used to—

In pharmaceutical industry, salt is used to—

The reaction between magnesium and dilute hydrochloric acid produces—

The bubble observed when magnesium powder is added to dilute $HCl$ is—

Which of the following is a weak acid?

When $NaOH$ is added to a colorless solution, it turns into violet. What is the solution?

(Based on the paragraph about Raji.) What is the cause of pain in Raji's leg?

The lotion applied to Raji's leg—

What is histamine?

How can soil acidity be removed?

What is a strong acid?

Why is vinegar considered a weak acid?

Mr. Tuhin's stomach pH is reported as 1.6. This means his stomach is—

Mr. Tuhin's arterial blood pH is 7.5, while the normal arterial blood pH is—

Why did the shopkeeper discourage Mr. Tuhin from buying the pH 5.5 lotion for his two-month-old baby?

What type of acid is hydrochloric acid?

Why is vinegar used in ointment to relieve the pain from a scorpion sting?

The reaction occurring when lime is applied to acidic soil to increase fertility is—

Although baking soda is a salt, why does its aqueous solution turn blue litmus red?

Alkalis and acids are opposite in nature. Consider: