Question 9:

The label on the bottle of chemicals is spoiled. How will you find whether the chemical is acidic or not?

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Solution

We can find the nature of that chemical by using Acid-Base indicators like litmus, Phenolphthalein, China rose extract, etc. If the stored chemical is acid then the blue litmus will turn into red and if the chemical was base in nature then the red litmus turn into blue color.

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a. Which acid is used for getting chloride salt ?
b. By squizzing lemon on a piece of rock the gas liberated turned lime water milky. which compound is present in the rock ?
c. The label on the bottle of chemical is spoiled. How will you find whether the chemical is acidic or not ?

Q. Directions:- Study the following information carefully to answer the question given below.

Six chemicals L, M, N, O, P and Q are kept in bottles of different colours viz. green, red, blue, white, pink and violet, not necessarily in the same order. The bottles are arranged from left to right, again not necessarily in the same order.
Chemical M is kept in a white bottle. Chemical L is not kept in a green bottle and is kept to the immediate left of the violet bottle. Chemical O is kept in the blue bottle and is kept exactly between the bottles containing chemicals L and M. The red bottle is at the extreme left end. The bottles containing chemical Q is not kept at either of the ends. The green bottle is kept at the extreme right end. Chemical P is not kept near the white bottle.

If all the six chemicals are arranged alphabetically from left to right, the positions of how many will remain unchanged?

Q. Directions:- Study the following information carefully to answer the question given below.

Six chemicals L, M, N, O, P and Q are kept in bottles of different colours viz. green, red, blue, white, pink and violet, not necessarily in the same order. The bottles are arranged from left to right, again not necessarily in the same order.
Chemical M is kept in a white bottle. Chemical L is not kept in a green bottle and is kept to the immediate left of the violet bottle. Chemical O is kept in the blue bottle and is kept exactly between the bottles containing chemicals L and M. The red bottle is at the extreme left end. The bottles containing chemical Q is not kept at either of the ends. The green bottle is kept at the extreme right end. Chemical P is not kept near the white bottle.

Which of the following combinations of chemical and bottle is correct?

Q. Directions:- Study the following information carefully to answer the question given below.

Six chemicals L, M, N, O, P and Q are kept in bottles of different colours viz. green, red, blue, white, pink and violet, not necessarily in the same order. The bottles are arranged from left to right, again not necessarily in the same order.
Chemical M is kept in a white bottle. Chemical L is not kept in a green bottle and is kept to the immediate left of the violet bottle. Chemical O is kept in the blue bottle and is kept exactly between the bottles containing chemicals L and M. The red bottle is at the extreme left end. The bottles containing chemical Q is not kept at either of the ends. The green bottle is kept at the extreme right end. Chemical P is not kept near the white bottle.

Four of the following five options are alike in a certain way based on their positions in the above arrangement and so form a group. Which is the one that does not belong to the group?

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Question 9: The label on the bottle of chemicals is spoiled. How will you find whether the chemical is acidic or not?

We can find the nature of that chemical by using Acid-Base indicators like litmus, Phenolphthalein, China rose extract, etc. If the stored chemical is acid then the blue litmus will turn into red and if the chemical was base in nature then the red litmus turn into blue color.

Question 9:

The label on the bottle of chemicals is spoiled. How will you find whether the chemical is acidic or not?