Class 10

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daanish

Asked: July 12, 2021In: Class 10 Science

A student takes about 4 mL of distilled water in four test tubes marked P, Q, R and S. He then dissolves in each test tube an equal amount of one salt in one test tube, namely, sodium sulphate in P potassium sulphate in Q, calcium sulphate in R and magnesium sulphate in S. After that he adds an equal amount of soap solution in each test tube. On shaking each of these test tubes well, he observes a good amount of lather (foam) in the test tubes marked.

CBSC Session 2022-23. Sample Papers of Class 10th, Science. NCERT Important Questions of Class 10th Science. NCERT Science Solutions of Class 10th. NCERT book extra Questions. CBSC Board and other State board. Important MCQ Science Questions of Class 10th.

Poll

daanish

Asked: July 12, 2021In: Class 10 Science

While preparing soap a small quantity of common salt is generally added to the reaction mixture of vegetable oil and sodium hydroxide. Which one of the following may be the purpose of adding common salt?

CBSC Session 2022-23. Sample Papers of Class 10th, Science. NCERT Important Questions of Class 10th Science. NCERT Science Solutions of Class 10th. NCERT book extra Questions. CBSC Board and other State board. Important MCQ Science Questions of Class 10th.

Poll

daanish

Asked: July 12, 2021In: Class 10 Science

While preparing soap, in a school laboratory, which one of the following is added with a vegetable oil:

CBSC Session 2022-23. Sample Papers of Class 10th, Science. NCERT Important Questions of Class 10th Science. NCERT Science Solutions of Class 10th. NCERT book extra Questions. CBSC Board and other State board. Important MCQ Science Questions of Class 10th.

daanish

Asked: July 12, 2021In: Class 10 Science

Write the importance of ciliary muscles in the human eye. Name the defect of vision that arises due to gradual weakening of the ciliary muscles in old age. What type of lenses are required by the persons suffering from this defect to see the objects clearly?

CBSC Session 2022-23. Sample Papers of Class 10th, Science. NCERT Important Questions of Class 10th Science. NCERT Science Solutions of Class 10th. NCERT book extra Questions. CBSC Board and other State board.

Anonymous

Asked: July 11, 2021In: Class 10 Science

Write the number of covalent bonds in the molecule of ethane.

CBSC Session 2022-23. Sample Papers of Class 10th, Science. NCERT Important Questions of Class 10th Science. NCERT Science Solutions of Class 10th. NCERT book extra Questions. CBSC Board and other State board.

Category: Class 10

While preparing soap a small quantity of common salt is generally added to the reaction mixture of vegetable oil and sodium hydroxide. Which one of the following may be the purpose of adding common salt?

While preparing soap, in a school laboratory, which one of the following is added with a vegetable oil:

Write the importance of ciliary muscles in the human eye. Name the defect of vision that arises due to gradual weakening of the ciliary muscles in old age. What type of lenses are required by the persons suffering from this defect to see the objects clearly?

Write the number of covalent bonds in the molecule of ethane.

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