Exploring Substances: Acidic, Basic, and Neutral

The substance that changes color in different types of solutions is called:

Litmus paper is usually available in which two colors?

Mineral acids like $H_2SO_4$ are usually:

Which of these acids is present in Amla?

Litmus is a natural dye and the most widely used indicator in science laboratories. Based on the extraction and property flowchart below, identify the source organism $P$ and the color $Q$ of the litmus solution in a neutral medium.

What happens to the temperature of the reaction mixture during a neutralization reaction?

Which of the following is the strongest base among the given options?

A student performs the experiments shown in the flowchart to study the chemical nature of oxides. After burning each substance in the presence of oxygen and dissolving the resulting products in water, two solutions, Y and Q, are obtained. Based on the properties of these solutions, which of the following observations is correct?

Which of these is the most appropriate way to handle a concentrated acid spill in a lab?

A student adds a few drops of China rose indicator to a solution of soap. What color change will be observed?

Which of these is a base?

Which of the following is a property of acids?

A substance 'Y' tastes bitter and turns red litmus blue. 'Y' is a?

In the laboratory, litmus is most commonly used in the form of?

Carbonated drinks are made by dissolving Carbon Dioxide ($CO_2$) gas in water under pressure, which forms a weak acid called carbonic acid. According to the process shown in the flowchart, what would be the observed 'Result' when the drink is tested?

What is the correct way to test a solid substance (like dry baking soda) with litmus paper?

A student was given a solution which turned red litmus blue. The solution is most likely:

A student is testing a solution that she suspects is 'Milk of Magnesia'. If her suspicion is correct, what color change will she observe with litmus?

If a solution turns red litmus blue, it is likely to react with which of the following to form a neutral salt?

Which of these substances is likely to have a pH less than 7 and turn blue litmus red?

If you have a solution that turns red rose indicator green, it is most likely:

An indicator tells us about the ________ of a substance.

Adding too much base to an acidic solution makes the mixture:

Which of the following is a base?

A student performed an experiment to test three unknown solutions ($L1, L2, L3$) using a homemade red rose indicator. Based on the observations shown in the flowchart, which set of substances correctly identifies $L1, L2,$ and $L3$?

Identify the incorrect match for red rose indicator color changes:

If a solution turns red litmus paper blue, what color will it turn the red rose indicator?

A solution 'M' turns red rose indicator green. When 'M' is reacted with 'N', the green color disappears and the solution becomes light pink. What is 'N'?

Which of the following is a characteristic of natural indicators like red rose extract?

In the reaction between $HCl$ and $NaOH$, if $HCl$ is in excess, the red rose indicator will show:

Which of the following is true about turmeric as an indicator?

If you mix a base and turmeric, you get a reddish-brown color. If you then add a lot of acid to that mixture, what might happen to the color?

What is the color of turmeric in a solution of Salt ($NaCl$)?

Turmeric powder is commonly used in Indian kitchens as a:

What is the expected color change when turmeric paste is added to curd?

A student tests a sample of window cleaner with turmeric paper and it turns red. This confirms the presence of:

Turmeric is not very effective in distinguishing between which two types of substances?

A turmeric stain is found on a white plate. If we pour a solution of $NaOH$ on it, and then immediately pour a solution of $HCl$ on it, what is the sequence of color changes observed?

Which of the following experimental errors would prevent a turmeric indicator from turning red in a basic solution?

A solution has a $pH$ of 8.5. How will turmeric indicator behave in this solution?

The color of China rose indicator in acidic solution is:

Excessive use of chemical fertilizers makes the soil:

When phenolphthalein is added to an acid, the solution remains:

The salt formed in a neutralization reaction can be:

A student performs a neutralization experiment by following the steps shown in the flowchart. If the blue litmus paper still turns red after the base is added and mixed, what can be concluded about the resulting mixture?

In the neutralization of $HCl$ and $NaOH$, which ions combine to form water ($H_2O$)?

What will be the effect of a neutral salt solution on turmeric paper?

When we mix an acidic solution and a basic solution, the property of the resulting mixture depends on:

Which of these is a correct observation during the neutralization of Magnesium Hydroxide by Hydrochloric acid?

If we add a few drops of blue litmus solution to a test tube containing a neutralization mixture where the acid is slightly in excess, what will be the color change?

The role of organic matter in basic soil is to:

The effect of an ant sting can be neutralised by rubbing with:

Salt can be formed by the reaction of:

Which of the following is a basic substance used in daily life?

A common daily practice to prevent tooth decay involves brushing with toothpaste. This process is summarized in the flowchart. Based on your knowledge of neutralisation in daily life, what is the chemical nature of toothpaste and its function?

Excessive use of chemical fertilizers makes the soil:

Which of the following will turn turmeric paper red?

Which of the following represents the correct reaction for the neutralization of stomach acid by 'Milk of Magnesia'?

When neutralizing a spill of Sulfuric acid on a lab bench, which is the safest substance to use?

In a laboratory, a student finds a bottle labeled 'Salt produced from $CH_{3}COOH$ and $NaOH$'. He tests the salt solution with litmus. What is the most likely result?