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Doctors Medicines MCQs Q&A

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Student A rub solid baking soda on dry litmus paper, B rub metal oxide on dry litmus paper, C dip litmus paper in vinegar, D dip litmus paper in aqueous solution of baking soda. The observations were made by student A, B, C, and D should be- Student Effect on dry red litmus paper Effect on dry blue litmus paper A Color Changed to blue No change B No change Color changed to red C No change Color changed to red D Color Changed to blue       Color changed to red The correct observation was made by the student
Identify the incorrect statement. a. Acids are sour in taste whereas bases are bitter in taste and soapy to touch. b. Acids turn blue litmus red and bases turn red litmus blue. c. Solutions of substances tat show different colours in acidic, basic and neutral solutions are called indicators. d. An acid and a base neutralise each other to form a salt and a salt is always neutral.
The following observations were made by student A, B, C, and D when they rubbed solid baking soda on dry litmus paper : Student Effect on dry red litmus paper Effect on dry blue litmus paper A Color Changed to blue No change B No change Color changed to red C Color changed to blue Color changed to red D No change No change The correct observation was made by the student
Below is the list of colors nominated as the favorite colors by students of class I. Determine the color which has frequency 9. red, blue, red, yellow, green, yellow, green, yellow, yellow, red, green, red, blue, red, yellow, red, blue, yellow, red, blue, blue, yellow, yellow, green, green
An acid turns blue litmus red and base turns red litmus blue. A group of student in a laboratory tested a solution with a red litmus paper which remained red with no change. This result shows that the solution is
Acid turns blue litmus red and base turns red litmus blue. A student tested a liquid with a red litmus paper which remained red with no change. This shows that the liquid
Consider the following statements.
1. Acids are sour in taste and change the colour of blue litmus to red.
2. Bases are bitter and change the colour of red litmus to blue.
3. Litmus is a natural indicator.
Which of the statements given above is/are correct?
Compare the values of the two quantities in the question and answer. Quantity 1: A bag contains 20 balls which are red, green and blue. Find the number of red balls in the bag, if the probability of picking a blue ball is 2/5 and that of either a red or a blue ball is 3/4. Quantity 2: A bag contains 25 balls which are red, green and blue. The probability of picking a red ball first is 2/5. If the first ball was red and without keeping it back, probability of picking a blue ball is 1/3, find the number of green balls.
Which of the following statement is/are true? I. Acid turns red litmus blue. II. Bases turn blue litmus red.
The difference in number of red and blue pants is 70 and average number of red and blue pants in a box is 125. If 25% of red pants and certain percentage of blue pants are sold then, total number of sold quantity of red and blue pants is 67. The number of unsold blue pants are what percent of number of unsold red pants?