Science 1 Marks Question

Is the distilled water acidic/basic/neutral? How would you verify it?

Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?

Give examples of some acids and bases.

Fill in the blank.
Phenolphthalein gives _________ colour with lime water.

State the nature of lemon juice.

Why acids do not show acidic behaviour in absence of water?

Name three organic acids which are used by us as food ingredients.

Rena is trying to wash turmeric stain on her cloth with soap, she noticed the stain colour changed to red, explain why?

What is the colour of methyl orange in acidic solution?

Name the reaction when an acid is mixed with base.

State whether the following statement are true or false. Correct the false statement. Phenolphthalein is a natural indicator.

Tina rubs a solution between fingers and feels soapy, what is the nature of that solution?

State the nature of baking soda.

Red litmus paper is dipped in a solution; it remains red, what is the nature of the solution?

Name one acid which is responsible for acid rain.

Name the acid that is present in fats in our body.

What is the test for acids and bases using litmus paper?

Fill in the blank. Turmeric and litmus are _________ acid-base indicators.

Why baking soda taste sour?

What do you mean by neutral substance, explain with examples?

Blue litmus paper is dipped in a solution. It remains blue, what is the nature of the solution?

What is meant by ‘basicity’ of an acid?

Paheli observed that most of the fish in the pond of her village were gradually dying. She also observed that the waste of a factory in their village is flowing into the pond which probably caused the fish to die. If the factory waste is acidic in nature, how can it be neutralised?

Name the acid present in lemon juice and tomato.

Name a universal indicator.

State whether the following statement are true or false. Correct the false statement. Lemon water is basic in nature.

What name is given to those substances which do not change the colour of either red or blue litmus paper?

Name a substance which is used to cure the discomfort caused by indigestion due to over eating.

Fill in the blank. Lemon juice and vinegar taste ________ because they contain_______.

Which acid is injected into our body by an ant sting that causes pain?

State whether the following statement are true or false. Correct the false statement. Calamine can be used to treat ant’s sting.

State whether the following statement are true or false. Correct the false statement.
Lime water turns red litmus blue.

Name the acid present in vinegar.

What is brine?

Is lime water an acidic or basic solution?

Why is carbonic acid added to soft drinks?

Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?

What is the use of litmus test?

Name the most commonly used indicator.

Why lemon juice and orange juice tastes sour?

The reaction between an acid and a base is known as:

Because it is basic in nature.

The wastes of many factories contain ____________.