In the given picture there is a lime water in A and B test tubes. A boy is breathing out the air into the test tubes. Predict your answers for the following : In which test tube did the lime water turn milky after you blew in and sucked out air ?

In the given picture there is a lime water in A and B test tubes. A boy is breathing out the air into the test tubes. Predict your answers for the following : What difference between inspired and expired air ?

In the given picture there is a lime water in A and B test tubes. A boy is breathing out the air into the test tubes. Predict your answers for the following : What was the colour of lime water in test tubes 'A' and 'B' before you began the experiment ?

Observe the set of apparatus and answer the following question. Which gas turns lime-water milky ?

Can you see the oil and water layers separately in both the test tubes.

Take 10 ml of water in a test tube. Add few sodium hydroxide pellets to it. Touch the bottom of the test tube. How do you feel ?

A little of rice flour is taken in a test tube and water is added to it. A drop of iodine solution is added to the contents of test tube. We see the following colour change:

Look at the following experiment. Answer the questions . Which gas turns lime-water milky ?

Take white antacid powder with water in a test tube add methyl orange indicator to it. Which colour do you observe ?

Two test tubes. 'A' and 'B' contains iron nails. In 'A' test tube iron nail is half dipped with water and in 'B' test tube iron nail is completely dipped in water and some oil also added. Then

Take some water in a test tube and add concentrated H_2SO_4 to it. Shake the test tube well. If you touch the bottom of the test tube, you feel it as hot. Now, instead of H_2SO_ 4 , if you add NaOH pellets to water in another test tube and touch the bottom, what do you observe?