CBSE Board 2022-23 - Test Assignment 1 | Science | Class 10th

CBSE Board 2022-23 - Test Assignment 1 | Science | Class 10th

Q.1. You are given balls and stick model of six carbon atoms and fourteen hydrogen atoms and sufficient number of sticks. In how many ways one can join the models of six carbon atoms and fourteen hydrogen atoms to form different molecules of C₆H₁₄.                5

Q.2. A compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. Identify the compound and write its chemical formula. Write the chemical equation for its preparation. Mention any one use of the compound.          3

Q.3. What do you observe when you add a few drops of acetic acid to a test tube containing: (a) Phenolphthalein, (b) Universal indicator, (c) distilled water, (d) sodium hydrogen carbonate.                                      2

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